U-HAUL HOLDING CO /NV/, 10-K filed on 02 Jun 23
 | XBRL Documents
v3.23.1
Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2023
May 19, 2023
Sep. 30, 2022
Document and Entity Information [Abstract]      
Entity Registrant Name U-Haul Holding Company    
Entity Central Index Key 0000004457    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Current Fiscal Year End Date --03-31    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 5,021,122,054
Document Fiscal Year Focus 2023    
Document Type 10-K    
Document Fiscal Period Focus FY    
Document Period End Date Mar. 31, 2023    
Amendment Flag false    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity File Number 001-11255    
Entity Tax Identification Number 88-0106815    
Entity Address Address Line 1 5555 Kietzke Lane    
Entity Address Address Line 2 Ste. 100    
Entity Address City Or Town Reno    
Entity Address State Or Province NV    
Entity Address Postal Zip Code 89511    
City Area Code 775    
Local Phone Number 688-6300    
Entity Interactive Data Current Yes    
Entity Incorporation State Country Code NV    
Document Annual Report true    
Document Transition Report false    
Auditor Name BDO USA, LLP    
Auditor Location Phoenix, Arizona    
Auditor Firm ID 243    
Nonvoting Common Stock [Member]      
Document and Entity Information [Abstract]      
Entity Common Stock, Shares Outstanding   176,470,092  
Security 12b Title Series N Non-Voting Common Stock, $0.001 par value    
Trading Symbol UHAL.B    
Security Exchange Name NYSE    
Common Stock [Member]      
Document and Entity Information [Abstract]      
Entity Common Stock, Shares Outstanding   19,607,788  
Security 12b Title Common stock, $0.25 par value    
Trading Symbol UHAL    
Security Exchange Name NYSE    
v3.23.1
Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
ASSETS:    
Cash and cash equivalents $ 2,060,524 $ 2,704,137
Reinsurance recoverables and trade receivables, net 189,498 229,343
Inventories, net 151,474 158,888
Prepaid expenses 241,711 236,915
Investments, fixed maturities and marketable equities 2,770,394 2,893,399
Investments, other 575,540 543,755
Deferred policy acquisition costs, net 152,377 103,828
Other assets 51,052 60,409
Right of use assets, financing, net 474,765 620,824
Right of use assets, operating 58,917 74,382
Related party assets 48,308 47,851
Subtotal assets 6,774,560 7,673,731
Property, plant and equipment, at cost:    
Land 1,537,206 1,283,142
Buildings and improvements 7,088,810 5,974,639
Furniture and equipment 928,241 846,132
Property, plant and equipment (gross) 15,660,293 13,358,406
Less: Accumulated depreciation (4,310,205) (3,732,556)
Total property, plant and equipment 11,350,088 9,625,850
Total assets 18,124,648 17,299,581
Liabilities:    
Accounts payable and accrued expenses 761,039 677,785
Notes, loans and leases payable 6,108,042 6,022,497
Operating lease liabilities 58,373 74,197
Finance Lease Liability 223,205  
Policy benefits and losses, claims and loss expenses payable 875,034 890,254
Liabilities from investment contracts 2,398,884 2,336,238
Other policyholders' funds and liabilities 8,232 10,812
Deferred income 52,282 49,157
Deferred income taxes, net 1,334,427 1,286,149
Total liabilities 11,596,313 11,347,089
Commitments and contingencies (notes 9, 16, 17 and 18)
Stockholders' equity:    
Additional paid-in capital 453,643 453,819
Accumulated other comprehensive loss (267,046) 46,384
Retained earnings 7,008,715 6,119,442
Total stockholders' equity 6,528,335 5,952,492
Total liabilities and stockholders' equity 18,124,648 17,299,581
Series A Preferred Stock [Member]    
Stockholders' equity:    
Preferred stock, value, issued 0 0
Series B Preferred Stock [Member]    
Stockholders' equity:    
Preferred stock, value, issued 0 0
Series A Common Stock [Member]    
Stockholders' equity:    
Common stock, value, issued 0 0
Amerco Common Stock [Member]    
Stockholders' equity:    
Common stock, value, issued 10,497 10,497
Nonvoting Common Stock [Member]    
Stockholders' equity:    
Common stock, value, issued 176 0
Common Stock in Treasury [Member]    
Stockholders' equity:    
Treasury stock, value (525,653) (525,653)
Preferred Stock in Treasury [Member]    
Stockholders' equity:    
Treasury stock, value (151,997) (151,997)
Rental Trailers and Other Rental Equipment [Member]    
Property, plant and equipment, at cost:    
Property subject to or available for operating lease, gross 827,696 615,679
Rental Trucks [Member]    
Property, plant and equipment, at cost:    
Property subject to or available for operating lease, gross $ 5,278,340 $ 4,638,814
v3.23.1
Condensed Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Revenues:      
Self-moving equipment rentals $ 3,877,917 $ 3,958,807 $ 3,083,317
Self-storage revenues 744,492 617,120 477,262
Self-moving and self-storage products and service sales 357,286 351,447 344,929
Property management fees 37,073 35,194 31,603
Life insurance premiums 99,149 111,027 121,609
Property and casualty insurance premiums 93,209 86,518 68,779
Net investment and interest income 176,679 148,261 122,938
Other revenue 478,886 431,373 291,548
Total revenues 5,864,691 5,739,747 4,541,985
Costs and expenses:      
Operating expenses 3,024,547 2,676,541 2,187,684
Commission expenses 416,315 429,581 329,609
Cost of sales 263,026 259,585 214,059
Benefits and losses 165,553 186,647 179,512
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Lease expense 30,829 29,910 28,470
Depreciation, net of (gains) losses on disposals 486,795 482,752 609,930
Net gains on disposal of real estate 5,596 (4,120) 3,281
Total costs and expenses 4,420,585 4,094,750 3,580,838
Earnings from operations 1,444,106 1,644,997 961,147
Other components of net periodic benefit costs (1,216) (1,120) (987)
Interest expense (223,958) (167,424) (163,502)
Fees and amortization on early extinguishment of debt (1,009) (956) 0
Pretax earnings 1,217,923 1,475,497 796,658
Income tax expense (294,925) (352,211) (185,802)
Earnings available to common shareholders 922,998 1,123,286 610,856
Common Stock [Member]      
Costs and expenses:      
Earnings available to common shareholders $ 0 $ 0 $ 0
Basic and diluted earnings per common share $ 5.54 $ 7.08 $ 5.37
Weighted average common shares outstanding: basic and diluted 19,607,788 19,607,788 19,607,788
Nonvoting Common Stock [Member]      
Costs and expenses:      
Earnings available to common shareholders $ 0 $ 0 $ 0
Basic and diluted earnings per common share $ 4.62 $ 5.58 $ 2.87
Weighted average common shares outstanding: basic and diluted 176,470,092 176,470,092 176,470,092
Nonvoting Common Stock [Member] | Common Stock [Member]      
Costs and expenses:      
Weighted average common shares outstanding: basic and diluted 196,077,880 196,077,880 196,077,880
v3.23.1
Condensed Consolidated Statements of Operations Parenthetical - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Depreciation:      
Net gains on disposal of personal property $ (247,084) $ (214,203) $ (54,071)
v3.23.1
Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Comprehensive income (loss) (pretax):      
Net earnings $ 1,217,923 $ 1,475,497 $ 796,658
Comprehensive income (loss) (tax effect):      
Net earnings (294,925) (352,211) (185,802)
Comprehensive income (loss) (net of tax):      
Net earnings 922,998 1,123,286 610,856
Other comprehensive income (loss):      
Foreign currency translation (pretax) (782) (2,828) (5,694)
Foreign currency translation (tax effect) 0 0 0
Foreign currency translation (net of tax) (782) (2,828) (5,694)
Unrealized gain (loss) on investments (pretax) (405,144) (78,452) 96,170
Unrealized gain (loss) on investments (tax effect) 85,954 15,826 (19,201)
Unrealized gain (loss) on investments (net of tax) (319,190) (62,626) 76,969
Change in fair value cash flow hedges (pretax) 6,672 605 (569)
Change in fair value of cash flow hedges (tax effect) (1,639) (148) 140
Change in fair value of cash flow hedges, (net of tax) 5,033 457 (429)
Amounts reclassified into earnings on hedging activities, (pre tax) (772) 3,948 3,640
Amounts reclassified into earnings on hedging activities (tax effect) 190 (970) (894)
Amounts reclassified into earnings on hedging,( net of tax) (582) 2,978 2,746
Postretirement benefit obligation gain (loss) (pretax) 2,772 2,049 (1,838)
Postretirement benefit obligation gain (loss) (tax effect) (681) (503) 451
Postretirement benefit obligation gain (loss) (net of tax) 2,091 1,546 (1,387)
Total other comprehensive income (loss) (pretax) (397,254) (74,678) 91,709
Total other comprehensive income (loss) (tax effect) 83,824 14,205 (19,504)
Total other comprehensive income loss, net (313,430) (60,473) 72,205
Total comprehensive income (pretax) 820,669 1,400,819 888,367
Total comprehensive income (tax effect) (211,101) (338,006) (205,306)
Total comprehensive income (loss) ( net of tax) $ 609,568 $ 1,062,813 $ 683,061
v3.23.1
Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Less: Treasury Common Stock [Member]
Less: Treasury Preferred Stock [Member]
Nonvoting Common Stock [Member]
Balance at Mar. 31, 2020 $ 4,287,929 $ 10,497 $ 453,819 $ 34,652 $ 4,466,611 $ (525,653) $ (151,997) $ 0
Consolidated statement of change in equity                
Adjustment for adoption of ASU 2016-13 (2,880) 0 0 0 (2,880) 0 0 0
Foreign currency translation (5,694) 0 0 (5,694) 0 0 0 0
Unrealized net gain (loss) on investments, net of tax 76,969 0 0 76,969 0 0 0 0
Change in fair value of cash flow hedges, net of tax (429) 0 0 (429) 0 0 0 0
Amounts reclassified into earnings on hedging activities 2,746 0 0 2,746 0 0 0 0
Change in post retirement benefit obligations (1,387) 0 0 (1,387) 0 0 0 0
Net earnings 610,856 0 0 0 610,856 0 0 0
Common stock dividends (49,019) 0 0 0 (49,019) 0 0 0
Series N Non-Voting Common Stock Dividends 0              
Net activity 631,162 0 0 72,205 558,957 0 0 0
Balance at Mar. 31, 2021 4,919,091 10,497 453,819 106,857 5,025,568 (525,653) (151,997) 0
Consolidated statement of change in equity                
Foreign currency translation (2,828) 0 0 (2,828) 0 0 0 0
Unrealized net gain (loss) on investments, net of tax (62,626) 0 0 (62,626) 0 0 0 0
Change in fair value of cash flow hedges, net of tax 457 0 0 457 0 0 0 0
Amounts reclassified into earnings on hedging activities 2,978 0 0 2,978 0 0 0 0
Change in post retirement benefit obligations 1,546 0 0 1,546 0 0 0 0
Net earnings 1,123,286 0 0 0 1,123,286 0 0 0
Common stock dividends (29,412) 0 0 0 (29,412) 0 0 0
Series N Non-Voting Common Stock Dividends 0              
Net activity 1,033,401 0 0 (60,473) 1,093,874 0 0 0
Balance at Mar. 31, 2022 5,952,492 10,497 453,819 46,384 6,119,442 (525,653) (151,997) 0
Consolidated statement of change in equity                
Common stock dividend 0 0 (176) 0 0 0 0 176
Foreign currency translation (782) 0 0 (782) 0 0 0 0
Unrealized net gain (loss) on investments, net of tax (319,190) 0 0 (319,190) 0 0 0 0
Change in fair value of cash flow hedges, net of tax 5,033 0 0 5,033 0 0 0 0
Amounts reclassified into earnings on hedging activities (582) 0 0 (582) 0 0 0 0
Change in post retirement benefit obligations 2,091 0 0 2,091 0 0 0 0
Net earnings 922,998 0 0 0 922,998 0 0 0
Common stock dividends (19,608) 0 0 0 (19,608) 0 0 0
Series N Non-Voting Common Stock Dividends (14,117) 0 0 0 (14,117) 0 0 0
Net activity 575,843 0 (176) (313,430) 889,273 0 0 176
Balance at Mar. 31, 2023 $ 6,528,335 $ 10,497 $ 453,643 $ (267,046) $ 7,008,715 $ (525,653) $ (151,997) $ 176
v3.23.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Cash flow from operating activities:      
Net earnings $ 922,998 $ 1,123,286 $ 610,856
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 733,879 696,955 664,001
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Amortization of premiums and accretion of discounts related to investments, inc 20,066 19,749 14,229
Amortization of debt issuance costs 7,087 5,659 5,948
Interest credited to policyholders 55,822 64,692 55,321
Change in allowance for losses on trade receivables (4,860) 4,227 1,206
Change in allowance for inventory reserves 9,490 15,235 1,298
Net gains on disposal of personal property (247,084) (214,203) (54,071)
Net gains on disposal of real estate 5,596 (4,120) 3,281
Net gains on sales of investments 8,300 (11,872) (10,058)
Net (gains) losses on equity investments 9,091 (7,837) (394)
Deferred income taxes 131,754 101,091 68,411
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 44,714 (9,187) (39,516)
Inventories and parts (2,225) (68,536) (5,775)
Prepaid expenses (5,575) 232,342 94,359
Capitalization of deferred policy acquisition costs (25,202) (32,626) (36,162)
Other assets 16,027 15,349 44,251
Related party assets (544) (10,357) (487)
Accounts payable and accrued expenses 34,263 10,514 78,718
Policy benefits and losses, claims and loss expenses payable (13,708) (19,692) (1,992)
Other policyholders' funds and liabilities (2,580) (1,608) 2,230
Deferred income 5,137 5,399 11,388
Related party liabilities (760) (2,079) 60
Net cash provided by operating activities 1,729,610 1,946,235 1,535,395
Cash flow from investing activities:      
Escrow deposits 9,298 (9,328) (5,221)
Purchase of:      
Property, plant and equipment (2,723,901) (2,136,537) (1,441,475)
Short term investments (60,037) (74,418) (69,929)
Fixed maturities investments (563,452) (627,326) (606,233)
Equity Securities (4,932) (19,299) (962)
Preferred stock 0 (8,000) (16,144)
Real estate (8,685) (261) (622)
Mortgage loans (204,579) (158,147) (158,071)
Proceeds from sale and paydowns of:      
Property, plant and equipment 701,331 623,235 537,484
Short term investments 74,457 51,591 69,718
Fixed maturities investments 196,635 360,937 529,239
Equity Securities 1,286 2,046 207
Preferred stock 0 2,000 2,700
Real estate 0 113 255
Mortgage loans 161,194 126,218 29,525
Net cash used by investing activities (2,421,385) (1,867,176) (1,129,529)
Cash flow from financing activities:      
Borrowings from credit facilities 1,017,898 1,969,474 922,008
Principal repayments on credit facilities (801,994) (437,506) (662,588)
Debt issuance costs (5,237) (13,156) (5,793)
Capital lease payments (124,188) (166,262) (221,247)
Securitization deposits 217 0 0
Voting Common stock dividends paid (19,608) (29,412) (49,019)
Series N Non-Voting Common Stock Dividends (14,117) 0 0
Investment contract deposits 341,483 347,520 517,856
Investment contract withdrawals (334,659) (237,503) (213,864)
Net cash provided by financing activities 59,795 1,433,155 287,353
Effects of exchange rate on cash (11,633) (2,089) 6,441
Increase (decrease) cash and cash equivalents (643,613) 1,510,125 699,660
Cash and cash equivalents at beginning of period 2,704,137 1,194,012 494,352
Cash and cash equivalents at the end of period $ 2,060,524 $ 2,704,137 $ 1,194,012
v3.23.1
Basis of Presentation
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Basis of Presentation U-Haul Holding Company, a Nevada Corporation, formerly known as AMERCO (“U-Haul Holding Company”), has a fiscal year that ends on the 31 st of March for each year that is referenced. Our insurance company subsidiaries have fiscal years that end on the 31 st of December for each year that is referenced. They have been consolidated on that basis. Our insurance companies’ financial reporting processes conform to calendar year reporting as required by state insurance departments. Management believes that consolidating their calendar year into our fiscal year financial statements does not materially affect the financial position or results of operations. We disclose material events, if any, occurring during the intervening period. Consequently, all references to our insurance subsidiaries’ years 2022, 2021 and 2020 correspond to fiscal 2023, 2022 and 2021 for U-Haul Holding Company. Accounts denominated in non-U.S. currencies have been translated into U.S. dollars.   Please see Note 3, Accounting Policies – Adoption of New Accounting Pronouncements, of the Notes to Consolidated Financial Statements.
v3.23.1
Principles of Consolidation
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Principles of Consolidation We apply Accounting Standards Codification (“ASC”) 810 - Consolidation (“ASC 810”) in our principles of consolidation. ASC 810 addresses arrangements where a company does not hold a majority of the voting or similar interests of a variable interest entity (“VIE”). A company is required to consolidate a VIE if it has determined it is the primary beneficiary, which is the entity with the power to direct activities that most significantly affect the economic performance of the VIE and has the obligation to absorb the majority of the losses or benefits. ASC 810 also addresses the policy when a company owns a majority of the voting or similar rights and exercises effective control. A VIE is not self-supportive due to having one or both of the following conditions: (i) it has an insufficient amount of equity for it to finance its activities without receiving additional subordinated financial support or (ii) its owners do not hold the typical risks and rights of equity owners. This determination is made upon the creation of a variable interest and is re-assessed on an on-going basis should certain changes in the operations of a VIE, or its relationship with the primary beneficiary trigger a reconsideration. After a reconsideration event occurs the most recent facts and circumstances are utilized in determining whether or not a company is a VIE, which other company(ies) have a variable interest in the entity, and whether or not the company’s interest is such that it is the primary beneficiary. We will continue to monitor our relationships with the other entities regarding who is the primary beneficiary, which could change based on facts and circumstances of any reconsideration events. Please see Note 20, Related Party Transactions, of the Notes to Consolidated Financial Statements. The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries, which are consolidated under the voting interest model. Intercompany accounts and transactions have been eliminated. Description of Legal Entities U-Haul Holding Company is the holding company for: U-Haul International, Inc. (“U-Haul”); Amerco Real Estate Company (“Real Estate”); Repwest Insurance Company (“Repwest”); and Oxford Life Insurance Company (“Oxford”). Unless the context otherwise requires, the terms “Company,” “we,” “us” or “our” refer to U-Haul Holding Company and all of its legal subsidiaries.   Description of Operating Segments U-Haul Holding Company has three ( 3 ) reportable segments. They are Moving and Storage, Property and Casualty Insurance and Life Insurance.   Moving and Storage includes U-Haul Holding Company, U-Haul, and Real Estate and the wholly-owned subsidiaries of U-Haul and Real Estate. Operations consist of the rental of trucks and trailers, sales of moving supplies, sales of towing accessories, sales of propane, and the rental of fixed and portable moving and storage units to the “do-it-yourself” mover and management of self-storage properties owned by others. Operations are conducted under the registered trade name U-Haul ® throughout the United States and Canada. Property and Casualty Insurance includes Repwest and its wholly-owned subsidiaries and ARCOA Risk Retention Group (“ARCOA”). Property and Casualty Insurance provides loss adjusting and claims handling for U-Haul through regional offices in the United States and Canada. Property and Casualty Insurance also underwrites components of the Safemove ® , Safetow ® , Safemove Plus ® , Safestor ® and Safestor Mobile ® protection packages to U-Haul customers. The business plan for Property and Casualty Insurance includes offering property and casualty products in other U-Haul related programs. ARCOA is a group captive insurer owned by us and our wholly owned subsidiaries whose purpose is to provide insurance products related to our moving and storage business. Life Insurance includes Oxford and its wholly owned subsidiaries. Life Insurance provides life and health insurance products primarily to the senior market through the direct writing and reinsuring of life insurance, Medicare supplement and annuity policies.
v3.23.1
Earnings Per Share
 12 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Earnings Per Share We calculate earnings per share using the two-class method in accordance with Accounting Standards Codification Topic 260, Earnings Per Share . The two-class method allocates the undistributed earnings available to common stockholders to the Company’s outstanding common stock, $0.25 par value (the “Voting Common Stock”) and the Series N Non-Voting Common Stock, $0.001 par value (the “Non-Voting Common Stock”) based on each share’s percentage of total weighted average shares outstanding. The Voting Common Stock and Non-Voting Common Stock are allocated 10% and 90%, respectively, of our undistributed earnings available to common stockholders. This represents earnings available to common stockholders less the dividends declared for both the Voting Common Stock and Non-Voting Common Stock. Our undistributed earnings per share is calculated by taking the undistributed earnings available to common stockholders and dividing this number by the weighted average shares outstanding for the respective stock. If there was a dividend declared for that period, the dividend per share is added to the undistributed earnings per share to calculate the basic and diluted earnings per share. The process is used for both Voting Common Stock and Non-Voting Common Stock. The calculation of basic and diluted earnings per share for the years ending March 31, 2023, 2022 and 2021 for our Voting Common Stock and Non-Voting Common Stock is as follows:     For the Year Ending     March 31,     2023   2022   2021               (In thousands, except share and per share amounts)               Weighted average shares outstanding of Voting Common Stock   19,607,788   19,607,788   19,607,788 Total weighted average shares outstanding for Voting Common Stock and Non-Voting Common Stock   196,077,880   196,077,880   196,077,880 Percent of weighted average shares outstanding of Voting Common Stock   10%   10%   10%               Net earnings available to common stockholders $ 922,998 $ 1,123,286 $ 610,856 Voting Common Stock dividends declared   (19,608)   (29,412)   (49,019) Non-Voting Common Stock dividends declared   (14,117)   –   – Undistributed earnings available to common stockholders $ 889,273 $ 1,093,874 $ 561,837 Undistributed earnings available to common stockholders allocated to Voting Common Stock $ 88,927 $ 109,387 $ 56,184               Undistributed earnings per share of Voting Common Stock $ 4.54 $ 5.58 $ 2.87 Dividends declared per share of Voting Common Stock $ 1.00 $ 1.50 $ 2.50 Basic and diluted earnings per share of Voting Common Stock $ 5.54 $ 7.08 $ 5.37                             Weighted average shares outstanding of Non-Voting Common Stock   176,470,092   176,470,092   176,470,092 Total weighted average shares outstanding for Voting Common Stock and Non-Voting Common Stock   196,077,880   196,077,880   196,077,880 Percent of weighted average shares outstanding of Non-Voting Common Stock   90%   90%   90%               Net earnings available to common stockholders $ 922,998 $ 1,123,286 $ 610,856 Voting Common Stock dividends declared   (19,608)   (29,412)   (49,019) Non-Voting Common Stock dividends declared   (14,117)   –   – Undistributed earnings available to common stockholders $ 889,273 $ 1,093,874 $ 561,837 Undistributed earnings available to common stockholders allocated to Non-Voting Common Stock $ 800,346 $ 984,487 $ 505,653               Undistributed earnings per share of Non-Voting Common Stock $ 4.54 $ 5.58 $ 2.87 Dividends declared per share of Non-Voting Common Stock $ 0.08 $ – $ – Basic and diluted earnings per share of Non-Voting Common Stock $ 4.62 $ 5.58 $ 2.87   Please see Note 13, Stockholders’ Equity, of the Notes to Consolidated Financial Statements for more information on the Non-Voting Common Stock.
v3.23.1
Reinsurance Recoverables and Trade Receivables, Net
 12 Months Ended
Mar. 31, 2023
Reinsurance Disclosures [Abstract]  
Reinsurance Recoverables and Trade Receivables, Net Note 5.   Reinsurance Recoverables and Trade Receivables, Net Reinsurance recoverables and trade receivables, net were as follows:     March 31,     2023   2022     (In thousands) Reinsurance recoverable $ 42,362 $ 50,586 Trade accounts receivable   110,281   150,285 Paid losses recoverable   400   345 Accrued investment income   29,553   28,689 Premiums and agents' balances   4,075   1,650 Independent dealer receivable   292   73 Other receivables   6,324   6,364     193,287   237,992 Less: Allowance for credit losses   (3,789)   (8,649)   $ 189,498 $ 229,343
v3.23.1
Other Assets
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Other Assets Note 7.   Other Assets Other assets were as follows:     March 31,     2023   2022     (In thousands) Deposits (debt-related) $ 35,573 $ 37,588 Deposits (real estate related)   15,479   22,821   $ 51,052 $ 60,409
v3.23.1
Net Investment and Interest Income
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Net Investment and Interest Income Note 8.   Net Investment and Interest Income Net investment and interest income, were as follows:       Years Ended March 31,     2023   2022   2021     (In thousands) Fixed maturities $ 171,814 $ 111,625 $ 102,021 Real estate   5,734   5,648   5,769 Insurance policy loans   869   705   829 Mortgage loans   23,854   25,850   18,248 Short-term, amounts held by ceding reinsurers, net and other investments   (17,257)   11,713   3,103 Investment income   185,014   155,541   129,970 Less: investment expenses   (8,335)   (7,280)   (7,032) Net investment and interest income $ 176,679 $ 148,261 $ 122,938
v3.23.1
Borrowings
 12 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Borrowings Note 9.   Borrowings Long-Term Debt Long-term debt was as follows:                     March 31,   2023 Rates   Maturities   2023   2022                     (In thousands) Real estate loan (amortizing term) (a) 4.29 % - 6.14 % 2027   2037 $ 289,647 $ 50,259 Senior mortgages 2.70 % - 5.50 % 2024 - 2042   2,371,231   2,206,268 Real estate loans (revolving credit) – % - – %     2027   –   535,000 Fleet loans (amortizing term) 1.61 % - 5.68 % 2023 - 2029   111,856   124,651 Fleet loans (revolving credit) 2.36 % - 5.97 % 2025 - 2027   615,000   560,000 Finance leases (rental equipment) 2.18 % - 5.04 % 2023 - 2026   223,205   347,393 Finance liability (rental equipment) 1.60 % - 5.98 % 2024 - 2031   1,255,763   949,936 Private placements 2.43 % - 2.88 % 2029 - 2035   1,200,000   1,200,000 Other obligations 1.50 % - 8.00 % 2023 - 2049   76,648   86,206 Notes, loans and finance leases payable                 $ 6,143,350 $ 6,059,713 Less: Debt issuance costs                   (35,308)   (37,216) Total notes, loans and finance leases payable, net         $ 6,108,042 $ 6,022,497                           (a) Certain loans have interest rate swaps fixing the rate between 2.72% and 2.86% based on current margin         Real Estate Backed Loans Real Estate Loan Certain subsidiaries of Real Estate and U-Haul Company of Florida are borrowers under real estate loans. These loans require monthly or quarterly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. These loans are secured by various properties owned by the borrowers. The interest rates, per the provisions of $ 206.3 million of these loans, are the applicable Secured Overnight Funding Rate (“SOFR”) plus the applicable margins and a credit spread adjustment of 0.10 %. As of March 31, 2023, the applicable SOFR was between 4.62 % and 4.83 % and applicable margin was between 0.65 % and 1.38 %, the sum of which, including the credit spread, was between 5.58 % and 6.14 %. The remaining $ 83.3 million of these loans was fixed with an interest rate of 4.29 %. The default provisions of these real estate loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. Senior Mortgages Various subsidiaries of Real Estate and U-Haul are borrowers under certain senior mortgages. The senior mortgages require monthly principal and interest payments. The senior mortgages are secured by certain properties owned by the borrowers. The fixed interest rates, per the provisions of the senior mortgages, range between 2.70% and 5.50%. The weighted average interest rate of these loans as of March 31, 2023 was 4.09%.  Certain senior mortgages have an anticipated repayment date and a maturity date. If these senior mortgages are not repaid by the anticipated repayment date, the interest rate on these mortgages would increase from the current fixed rate. We are using the anticipated repayment date for our maturity schedule. Real Estate and U-Haul have provided limited guarantees of the senior mortgages. The default provisions of the senior mortgages include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. There are limited restrictions regarding our use of the funds. Real Estate Loans (Revolving Credit) U-Haul Holding Company is a borrower under a multi-bank syndicated real estate loan. As of March 31, 2023, the maximum credit commitment is $ 465.0 million. As of March 31, 2023, the full capacity was available to borrow. This loan agreement provides for revolving loans, subject to the terms of the loan agreement. This loan requires monthly interest payments with the unpaid loan balance and accrued and unpaid interest due at maturity. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. There is a 0.30 % fee charged for unused capacity. This loan was amended in October 2022 and the maximum credit limit was increased from $ 150 million to $ 465 million, the maturity extended to October 2027 and LIBOR based rates were replaced with SOFR based rates. Fleet Loans Rental Truck Amortizing Loans The amortizing loans require monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. These loans were used to purchase new trucks. The interest rates, per the provision of the loan agreements, are carried at fixed rates ranging between 1.61 % and 5.68 %.   All of our rental truck amortizing loans are collateralized by the rental equipment purchased.   The majority of these loans are funded at 70%, but some may be funded at 100%. U-Haul Holding Company, and in some cases U-Haul, is guarantor of these loans. The default provisions of these loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. The net book value of the corresponding rental equipment was $213.1 million and $253.3 million as of March 31, 2023 and 2022, respectively. Rental Truck Revolvers Various subsidiaries of U-Haul entered into three revolving fleet loans with an aggregate borrowing capacity of $ 615.0 million. The aggregate outstanding balance for these revolvers as of March 31, 2023 was $ 615.0 million. The interest rates, per the provision of the loan agreements, are SOFR plus the applicable margin and a credit spread adjustment of 0.10 %. As of March 31, 2023, SOFR was between 4.52 % and 4.67 % and the margin was between 1.15 % and 1.25 %, the sum of which, including the credit spread, was between 5.77 % and 5.97 %. Of the $ 615.0 million outstanding, $ 100.0 million was fixed with an interest rate of 2.36 %. Only interest is paid on the loans until the last nine months of the respective loan terms when principal becomes due monthly. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. These fleet loans are collateralized by the rental equipment purchased. The net book value of the corresponding rental equipment was $822.0 million and $654.6 million as of March 31, 2023 and 2022, respectively. Finance Leases The Finance Lease balance represents our sale-leaseback transactions of rental equipment. The agreements are generally seven (7) year terms with interest rates ranging from 2.18% to 5.04%.  All of our finance leases are collateralized by our rental fleet. The net book value of the corresponding rental equipment was $474.8 million and $620.8 million as of March 31, 2023 and March 31, 2022, respectively. There were no new financing leases, as assessed under the new leasing guidance, entered into during fiscal 2023. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. Finance Liabilities Finance liabilities represent our rental equipment financing transactions, and we assess if these sale-leaseback transactions qualify as a sale at initiation by determining if a transfer of ownership occurs.   We have determined that our equipment sale-leasebacks do not qualify as a sale, as the buyer-lessors do not obtain control of the assets in our ongoing sale-leaseback arrangements. As a result, these sale-leasebacks are accounted for as a financial liability and the leased assets are capitalized at cost.     Our finance liabilities have an average term of seven (7) years and interest rates ranging from 1.60 % to 5.98 %. These finance liabilities are collateralized by the related assets of our rental fleet.   The net book value of the corresponding rental equipment was $1,499.1 million and $1,068.3 million as of March 31, 2023 and March 31, 2022, respectively. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. Private Placements In September 2021, U-Haul Holding Company entered into a note purchase agreement to issue $ 600.0 million of fixed rate senior unsecured notes in a private placement offering.   These notes consist of four tranches each totaling $ 150.0 million and funded in September 2021.   The fixed interest rates range between 2.43 % and 2.78 % with maturities between 2029 and 2033 .   Interest is payable semiannually. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. In December 2021, U-Haul Holding Company entered into a note purchase agreement to issue $ 600.0 million of fixed rate senior unsecured notes in a private placement offering. These notes consist of three tranches each totaling $ 100.0 million and two tranches each totaling $ 150.0 million.   The fixed interest rates range between 2.55 % and 2.88 % with maturities between 2030 and 2035 .   Interest is payable semiannually. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of March 31, 2023. Other Obligations In February 2011, U-Haul Holding Company and U.S. Bank Trust Company, NA, as successor in interest to U.S. Bank National Association (the “Trustee”), entered into the U-Haul Investors Club ® Indenture.   U-Haul Holding Company and the Trustee entered into this indenture to provide for the issuance of notes by us directly to investors over our proprietary website, uhaulinvestorsclub.com (“U-Notes ® ”). The U-Notes ® are secured by various types of collateral, including, but not limited to, certain rental equipment and real estate.   U-Notes ® are issued in smaller series that vary as to principal amount, interest rate and maturity.   U-Notes ® are obligations of the Company and secured by the associated collateral; they are not guaranteed by any of the Company’s affiliates or subsidiaries. As of March 31, 2023, the aggregate outstanding principal balance of the U-Notes ® issued was $ 78.4 million, of which $ 1.7 million is held by our insurance subsidiaries and eliminated in consolidation. Interest rates range between 1.50 % and 8.00 % and maturity dates range between 2023 and 2049 . Oxford is a member of the Federal Home Loan Bank (“FHLB”) and, as such, the FHLB has made deposits with Oxford. As of December 31, 2022, the deposits had an aggregate balance of $60.0 million, with an availability of $78.9 million, for which Oxford pays fixed interest rates between 0.49% and 4.21% with maturities between March 30, 2023 and September 30, 2027. As of December 31, 2022, available-for-sale investments held with the FHLB totaled $88.4 million, of which $62.8 million were pledged as collateral to secure the outstanding advances. The balances of these advances are included within Liabilities from investment contracts on the condensed consolidated balance sheets. Annual Maturities of Notes, Loans and Finance Leases Payable The annual maturities of our notes, loans and finance leases payable, before debt issuance costs, as of March 31, 2023 for the next five years and thereafter are as follows:     Years Ended March 31,     2024   2025   2026   2027   2028   Thereafter   Total     (In thousands) Notes, loans and finance leases payable, secured $ 563,153 $ 698,301 $ 667,490 $ 819,153 $ 647,409 $ 2,747,844 $ 6,143,350
v3.23.1
Interest on Borrowings
 12 Months Ended
Mar. 31, 2023
Interest Expense, Borrowings [Abstract]  
Interest on Borrowings Note 10.   Interest on Borrowings Interest Expense Components of interest expense include the following:       Years Ended March 31,     2023   2022   2021     (In thousands) Interest expense $ 229,559 $ 167,618 $ 165,484 Capitalized interest   (11,814)   (9,700)   (11,573) Amortization of transaction costs   6,987   5,556   5,949 Interest expense resulting from cash flow hedges   (774)   3,950   3,642 Total interest expense   223,958   167,424   163,502   Interest paid in cash amounted to $ 225.8 million, $ 166.1 million and $ 166.4 million for fiscal 2023, 2022 and 2021, respectively. Interest paid (received) in cash on derivative contracts was ($0.8) million, $4.0 million and $3.6 million, for fiscal 2023, 2022 and 2021, respectively. Interest Rates Interest rates and our revolving credit borrowings were as follows:       Revolving Credit Activity       Years Ended March 31,       2023   2022   2021       (In thousands, except interest rates)   Weighted average interest rate during the year   3.93 % 1.40 % 1.40 % Interest rate at year end   5.89 % 1.49 % 1.40 % Maximum amount outstanding during the year $ 1,105,000 $ 1,105,000 $ 1,175,000   Average amount outstanding during the year $ 824,211 $ 1,085,074 $ 1,088,293   Facility fees $ 733 $ 253 $ 261  
v3.23.1
Derivatives
 12 Months Ended
Mar. 31, 2023
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Derivatives Note 11.   Derivatives We manage exposure to changes in market interest rates. Our use of derivative instruments is limited to highly effective interest rate swaps to hedge the risk of changes in cash flows (future interest payments) attributable to changes in SOFR swap rates with the designated benchmark interest rate being hedged on certain of our SOFR indexed variable rate debt.   The interest rate swaps effectively fix our interest payments on certain SOFR indexed variable rate debt through July 2032. We monitor our positions and the credit ratings of our counterparties and do not currently anticipate non-performance by the counterparties. Interest rate swap agreements are not entered into for trading purposes.   These fair values are determined using pricing valuation models which include broker quotes for which significant inputs are observable. They include adjustments for counterparty credit quality and other deal-specific factors, where appropriate and are classified as Level 2 in the fair value hierarchy. The derivative fair values reflected in prepaid expense and accounts payable and accrued expenses in the consolidated balance sheet were as follows:           March 31, 2023   March 31, 2022     (In thousands) Interest rate swaps designated as cash flow hedges         Assets $ 5,311 $ – Liabilities   –   587 Notional amount   206,347   235,000       The Effect of Interest Rate     Contracts on the Statements of Operations     Years Ended March 31,     2023   2022   2021     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (5,900) $ (4,553) $ (3,071) (Gain) loss reclassified from AOCI into income $ 772 $ (3,948) $ (3,640)   (Gains) or losses recognized in income on interest rate derivatives are recorded as interest expense in the consolidated statements of operations. During fiscal years 2023, 2022 and 2021, we recognized an increase (decrease) in the fair value of our cash flow hedges of $5.0, $0.5 million and ($0.4) million, respectively, net of taxes. During fiscal years 2023, 2022 and 2021, we reclassified ($0.8) million, $3.9 million and $3.6 million, respectively, from AOCI to interest expense. As of March 31, 2023, we expect to reclassify $ 3.7 million of net gains on interest rate contracts from AOCI to earnings as interest expense over the next twelve months. We use derivatives to economically hedge our equity market exposure to indexed annuity products sold by our Life Insurance company. These contracts earn a return for the contractholder based on the change in the value of the S&P 500 index between annual index point dates. We buy and sell listed equity and index call options and call option spreads. The credit risk is with the party in which the options are written. The net option price is paid up front and there are no additional cash requirements or additional contingent liabilities. These contracts are held at fair value on our balance sheet.  At December 31, 2022 and 2021, these derivative hedges had a fair value of $4.3 million and $7.5 million, with notional amounts of $465.7 million and $416.7 million, respectively. At December 31, 2022 and 2021, these derivative instruments are included in Investments, other, on the consolidated balance sheets. Net (gains) losses recognized in net investment and interest income for fiscal year 2023, 2022 and 2021 were $8.9 million, ($3.7) million and ($2.6) million, respectively. The fair values of these call options are determined based on quoted market prices from the relevant exchange and are classified as Level 1 in the fair value hierarchy.     Derivatives Fair Values as of     March 31, 2023   March 31, 2022               (In thousands) Equity market contracts as economic hedging instruments         Assets $ 4,295 $ 7,474 Liabilities $ – $ – Notional amount $ 465,701 $ 416,739 Although the call options are employed to be effective hedges against our policyholder obligations from an economic standpoint, they do not meet the requirements for hedge accounting under GAAP. Accordingly, the changes in fair value of the call options are recognized each reporting date as a component of net investment and interest income. The changes in fair value of the call options include the gains or losses recognized at the expiration of the option term and the changes in fair value for open contracts.
v3.23.1
Accumulated Other Comprehensive Income
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Other Comprehensive Income Noncontrolling Interest [Text Block] Note 12.   Accumulated Other Comprehensive Income (Loss) A summary of our AOCI components, net of tax, were as follows:       Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $   (2,601) $   34,652 Foreign currency translation   (5,694)   –   –   –   (5,694) Unrealized net gain on investments   –   76,969   –   –   76,969 Change in fair value of cash flow hedges   –   –   (429)   –   (429) Amounts reclassified into earnings on hedging activities   –   –   2,746   –   2,746 Change in post retirement benefit obligations   –   –   –   (1,387)   (1,387) Other comprehensive income (loss)   (5,694)   76,969   2,317   (1,387)   72,205 Balance as of March 31, 2021 $ (52,929) $ 167,653 $ (3,879) $   (3,988) $   106,857 Foreign currency translation   (2,828)   –   –   –   (2,828) Unrealized net loss on investments   –   (62,626)   –   –   (62,626) Change in fair value of cash flow hedges   –   –   457   –   457 Amounts reclassified into earnings on hedging activities   –   –   2,978   –   2,978 Change in post retirement benefit obligations   –   –   –   1,546   1,546 Other comprehensive income (loss)   (2,828)   (62,626)   3,435   1,546   (60,473) Balance as of March 31, 2022 $ (55,757) $ 105,027 $ (444) $   (2,442) $ 46,384 Foreign currency translation   (782)   –   –   –   (782) Unrealized net loss on investments   –   (319,190)   –   –   (319,190) Change in fair value of cash flow hedges   –   –   5,033   –   5,033 Amounts reclassified into earnings on hedging activities   –   –   (582)   –   (582) Change in post retirement benefit obligations   –   –   –   2,091   2,091 Other comprehensive income (loss)   (782)   (319,190)   4,451   2,091   (313,430) Balance as of March 31, 2023$( 56,539 )$( 214,163 )$ 4,007 $ ( 351 )$ (267,046)
v3.23.1
Stockholders' Equity
 12 Months Ended
Mar. 31, 2023
Stockholders' Equity Attributable to Parent [Abstract]  
Stockholders' Equity Note 13. Stockholders’ Equity The following table lists the dividends that have been declared and issued for fiscal years 2023 and 2022. Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               August 18, 2022 $ 0.50   September 6, 2022   September 20, 2022 April 6, 2022 $ 0.50   April 18, 2022   April 29, 2022 October 6, 2021 $ 0.50   October 18, 2021   October 29, 2021 August 19, 2021 $ 0.50   September 7, 2021   September 21, 2021 June 9, 2021 $ 0.50   June 24, 2021   July 8, 2021   Non-Voting Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               March 3, 2023 $ 0.04   March 14, 2023   March 27, 2023 December 7, 2022 $ 0.04   December 19, 2022   December 30, 2022   As of March 31, 2023, no awards had been issued under the 2016 AMERCO Stock Option Plan. Creation of the Series N Non-Voting Common Stock Effective October 24, 2022, the Company created a new series of common stock, designated as Non-Voting Common Stock. The Non-Voting Common Stock has a par value of $ 0.001 per share, 250,000,000 shares authorized and trades on the New York Stock Exchange (“NYSE”) under the ticker symbol “UHAL.B”.   Shares of the Company’s Voting Common Stock also trade on the NYSE under the ticker symbol ”UHAL.” 9-for-1 Stock Dividend Involving Non-Voting Common Stock On October 24, 2022, the Company issued shares of the Non-Voting Common Stock through a stock dividend, on a 9-for-1 basis, to then-existing holders of the Company’s Voting Common Stock. The shares of Non-Voting Common Stock were distributed after the close of trading on November 9, 2022, to stockholders of record of Voting Common Stock at the close of business on November 3, 2022. Trading of the 176,470,092 shares of Non-Voting Common Stock began on November 10, 2022. Dividend Policy for Non-Voting Common Stock In response to the Committee’s recommendation to consider a dividend policy, the Board adopted a dividend policy for the new Non-Voting Common Stock. Unless the Board in its sole discretion determines otherwise, it shall be the policy of the Company to declare and pay a quarterly cash dividend on each share of the Company’s Non-Voting Common Stock, in the amount of $ 0.04 per share. This policy commenced in the third quarter of fiscal year 2023. On December 19, 2022, the Company transferred the listings of both UHAL and UHAL.B to the NYSE from the NASDAQ Global Select Market.
v3.23.1
Provision for Taxes
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Provision for Taxes Note 14.   Provision for Taxes Earnings before taxes and the provision for taxes consisted of the following:     Years Ended March 31,     2023   2022   2021     (In thousands) Pretax earnings:             U.S. $ 1,178,264 $ 1,431,155 $ 773,030 Non-U.S.   39,659   44,342   23,628 Total pretax earnings $ 1,217,923 $ 1,475,497 $ 796,658               Current provision             Federal $ 115,171 $ 189,488 $ 100,521 State   42,121   55,518   16,572 Non-U.S.   5,150   6,893   3,404     162,442   251,899   120,497 Deferred provision             Federal   114,355   90,852   53,957 State   14,077   6,355   9,795 Non-U.S.   4,051   3,105   1,553     132,483   100,312   65,305               Provision for income tax expense $ 294,925 $ 352,211 $ 185,802               Income taxes paid (received) $ 145,680 $ ( 4,548 ) $ 29,044   The difference between the tax provision at the statutory federal income tax rate and the tax provision attributable to income before taxes was as follows:     Years Ended March 31,       2023   2022   2021       (In percentages)   Statutory federal income tax rate   21.00 % 21.00 % 21.00 % Increase (reduction) in rate resulting from:               State taxes, net of federal benefit   3.56 % 3.24 % 2.53 % Foreign rate differential   0.08 % 0.05 % – % Federal tax credits   (0.48) % (0.19) % (0.99) % Tax-exempt income   (0.08) % (0.03) % (0.08) % Dividend received deduction   (0.01) % – % (0.01) % Other   0.15 % (0.20) % 0.87 % Actual tax expense of operations   24.22 % 23.87 % 23.32 % Significant components of our deferred tax assets and liabilities were as follows:     March 31,     2023   2022 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 33,778 $ 36,394 Accrued expenses   112,971   103,723 Policy benefit and losses, claims and loss expenses payable, net   31,436   30,572 Unrealized losses on investments   48,179   – Operating leases   12,058   15,540 Total deferred tax assets $ 238,422 $ 186,229           Deferred tax liabilities:         Property, plant and equipment $ 1,545,628 $ 1,405,604 Operating leases   12,175   15,540 Deferred policy acquisition costs   12,038   12,962 Unrealized gains on investments   –   36,299 Other   3,008   1,973 Total deferred tax liabilities   1,572,849   1,472,378 Net deferred tax liability $ 1,334,427 $ 1,286,149 On March 27, 2020, former President Trump signed into U.S. federal law the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”), which was aimed at providing emergency assistance and health care for individuals, families, and businesses affected by COVID-19 global pandemic and generally supporting the U.S. economy.   The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer side social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations, increased limitations on qualified charitable contributions, and technical corrections to tax depreciation methods for qualified improvement property. In particular, the CARES Act allows for net operating losses (“NOL“) generated in 2018, 2019, or 2020 to be carried back 5 years.    As a result, we filed applicable forms with the IRS to carryback NOLs. The statutory tax rate for the carryback years was 35% as compared to 21% at present.   Consequently, we recognized a benefit amount of $ 146 million for fiscal year 2020. These refund claims total approximately $ 366 million, of which we have received approximately $ 243 million in fiscal 2022 and are reflected in prepaid expense. As refunds are received, they will reduce this amount. We have estimated and recorded the overall effects of the CARES Act and do not anticipate a material change. As a result, the NOL and credit carry-forwards in the above table are primarily attributable to state NOLs. As of March 31, 2023 and 2022, we had state NOLs of $ 480.0 million and $ 458.5 million, respectively, that will begin to expire March 31, 2024, if not utilized. On March 3, 2021, the IRS notifiied us that our federal inome tax returns for the tax years March 31, 2014, 2015, 2016, 2018 and 2019 were selected for examination. The IRS agent in charged confirmed that this is a limited scope examination arising out of NOL carryback claims and is a standard procedure for the IRS to process the refund. As such, the scope of the exam is expected to be limited to the items reported on Forms 1139 and related schedules only. As of now, we are still working with the IRS agent and there is no audit adjustment for any of the above tax periods. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to transition tax, or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities (i.e., basis difference in excess of that subject to the one-time transition tax) is not practicable. We account for uncertainty in income taxes by recognizing the tax benefit or expense from an uncertain tax position only if it is more likely than not that the tax position will be sustained upon examination by the taxing authorities, based on the technical merits of the position. The Company measures the tax benefits and expenses recognized in the consolidated financial statements from such a position based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. A reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period are as follows:     Unrecognized Tax Benefits     March 31,     2023   2022     (In thousands)           Unrecognized tax benefits beginning balance $ 48,851 $ 31,069 Additions based on tax positions related to the current year   7,226   8,257 Reductions for tax positions of prior years   (443)   – Additions for tax provisions of prior years   2,473   9,525 Unrecognized tax benefits ending balance $ 58,107 $ 48,851 We recognize interest related to unrecognized tax benefits as interest expense, and penalties as income tax expenses. As of March 31, 2023 and 2022, the amount of interest accrued on unrecognized tax benefits was $ 17.7 million and $ 15.7 million, respectively, net of tax. During the current year, we recorded expense from interest in the amount of $ 2.0 million, net of tax. We file income tax returns in the U.S. federal jurisdiction, and various states and Canadian jurisdictions. While the Company has ongoing audits in Canada and various state jurisdictions, there have been no proposed or anticipated adjustments that would materially impact the financial statements. With some exceptions, we are no longer subject to audit for years prior to the fiscal year ended March 31, 2020.
v3.23.1
Employee Benefit Plans
 12 Months Ended
Mar. 31, 2023
Compensation and Retirement Disclosure [Abstract]  
Employee Benefit Plans Note 15.   Employee Benefit Plans Profit Sharing Plans We provide tax-qualified profit sharing retirement plans for the benefit of eligible employees, former employees and retirees in the United States and Canada. The plans are designed to provide employees with an accumulation of funds for retirement on a tax-deferred basis and provide for annual discretionary employer contributions. Amounts to be contributed are determined by the President and Chairman of the Board of Directors (the “Board”) of the Company under the delegation of authority from the Board, pursuant to the terms of the Profit Sharing Plan. No contributions were made to the profit sharing plan during fiscal 2023, 2022 or 2021. We also provide an employee savings plan which allows participants to defer income under Section 401(k) of the Internal Revenue Code of 1986. ESOP Plan We sponsor an Employee Stock Ownership Plan (“ESOP”) that generally covers all employees with one year or more of service. The ESOP began as a leveraged plan where shares were pledged as collateral for its debt which was originally funded by U-Haul. We made annual contributions to the ESOP equal to the ESOP’s debt service. As the debt was repaid, shares were released from collateral and allocated to active employees, based on the proportion of debt service paid in the year. ESOP shares were committed to be released monthly and ESOP compensation expense was recorded based on the current market price at the end of the month. These shares then become outstanding for the earnings per share computations.  In fiscal 2021 we de-levered the plan and now contributions are made at the discretion of management with expense being recognized upon the decision to contribute.  ESOP compensation expense was $22.1 million, $23.0 million and $23.0 million for fiscal 2023, 2022 and 2021, respectively, which are included in operating expenses in the consolidated statements of operations. In fiscal 2023, 2022 and 2021, the Company made non-leveraged contributions of $ 22.1 million, $ 23.0 million and $ 23.0 million, respectively to the Plan Trust. During fiscal 2023, ESOP purchased for allocation 424,484 of non-leveraged Non-Voting Common Stock shares and during fiscal 2022, ESOP purchased for allocation 33,954 of non-leveraged Voting Common Stock shares.   Shares held by the ESOP were as follows:     Years Ended March 31,     2023   2022     (In thousands) Allocated shares - Voting Common Stock   836   890 Allocated shares - Non-Voting Common Stock   7,821   –   Post Retirement and Post Employment Benefits We provide a health reimbursement benefit to our eligible U.S. employees and their eligible dependents upon retirement from the Company. The retiree must have attained age sixty-five and earned twenty years of full-time service upon retirement to be awarded the health reimbursement benefit. The health reimbursement benefit is capped at a $ 20,000 lifetime maximum per covered person. Reimbursements are for amounts requested that are paid out of pocket after Medicare and any other medical policies in force. In addition, retirees who have attained age sixty-five and earned at least twenty years of full-time service upon retirement from the Company are entitled to group term life insurance benefits. The life insurance benefit is $ 3,000 plus $ 100 for each year of employment over twenty years. The benefits are not funded, and claims are paid as they are incurred. We use a March 31 measurement date for our post retirement benefit disclosures. The components of net periodic post retirement benefit cost were as follows:     Years Ended March 31,     2023   2022   2021     (In thousands) Service cost for benefits earned during the period $ 1,326 $ 1,401 $ 1,267 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   1,148   908   919 Other components   68   212   68 Total other components of net periodic benefit costs   1,216   1,120   987 Net periodic postretirement benefit cost $ 2,542 $ 2,521 $ 2,254 The fiscal 2023 and fiscal 2022 post retirement benefit liability included the following components:     Years Ended March 31,     2023   2022     (In thousands) Beginning of year $ 30,206 $ 30,755 Service cost for benefits earned during the period   1,326   1,401 Interest cost on accumulated post retirement benefit   1,148   908 Net benefit payments and expense   (1,207)   (1,021) Actuarial gain   (2,703)   (1,837) Accumulated postretirement benefit obligation   28,770   30,206           Current liabilities   1,625   1,449 Non-current liabilities   27,145   28,757           Total post retirement benefit liability recognized in statement of financial position   28,770   30,206 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (465)   (3,237) Cumulative net periodic benefit cost (in excess of employer contribution) $ 28,305 $ 26,969   The discount rate assumptions in computing the information above were as follows:     Years Ended March 31,     2023 2022 2021     (In percentages)   Accumulated postretirement benefit obligation   5.08 % 3.76 % 2.93 %   In December 2003, the Medicare Prescription Drug Improvement and Modernization Act of 2003 became law. Net periodic post retirement benefit cost above includes the effect of the subsidy. The discount rate represents the expected yield on a portfolio of high grade (AA to AAA rated or equivalent) fixed income investments with cash flow streams sufficient to satisfy benefit obligations under the plan when due. Fluctuations in the discount rate assumptions primarily reflect changes in U.S. interest rates. The assumed health care cost trend rate used to measure the accumulated postretirement benefit obligation as of the end of fiscal 2023 was 6.0 % in the initial year and was projected to decline annually to an ultimate rate of 4.0 % in fiscal 2047. The assumed health care cost trend rate used to measure the accumulated post retirement benefit obligation as of the end of fiscal 2022 (and used to measure the fiscal 2023 net periodic benefit cost) was 4.9% in the initial year and was projected to decline annually to an ultimate rate of 4.0% in fiscal 2046. Post-employment benefits provided by us, other than upon retirement, are not material. Future net benefit payments are expected as follows:     Future Net Benefit Payments     (In thousands) Year-ended:     2024 $ 1,546 2025   1,768 2026   2,021 2027   2,270 2028   2,532 2029 Through 2033   13,291 Total $ 23,428
v3.23.1
Fair Value Measurements
 12 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements Note 16.   Fair Value Measurements Certain assets and liabilities are recorded at fair value on the consolidated balance sheets and are measured and classified based upon a three-tiered approach to valuation. Financial assets and liabilities recorded at fair value and are classified and disclosed in one of the following three categories: Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;   Level 2 – Quoted prices for identical or similar financial instruments in markets that are not considered to be active, or similar financial instruments for which all significant inputs are observable, either directly or indirectly, or inputs other than quoted prices that are observable, or inputs that are derived principally from or corroborated by observable market data through correlation or other means; and Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and are unobservable. These reflect management’s assumptions about the assumptions a market participant would use in pricing the asset or liability. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Fair values of cash equivalents approximate carrying value due to the short period of time to maturity. Fair values of short-term investments are based on quoted market prices. Fair values of investments available-for-sale are based on quoted market prices, dealer quotes or discounted cash flows. Fair values on interest rate swap contracts are based on using pricing valuation models which include broker quotes. Fair values of long-term investments and mortgage loans and notes on real estate are based on quoted market prices, dealer quotes or discounted cash flows. Fair values of trade receivables approximate their recorded value. Our financial instruments that are exposed to concentrations of credit risk consist primarily of temporary cash investments, trade receivables, reinsurance recoverables and notes receivable. Limited credit risk exists on trade receivables due to the diversity of our customer base and their dispersion across broad geographic markets. We place our temporary cash investments with financial institutions and limit the amount of credit exposure to any one financial institution. We have mortgage receivables, which potentially expose us to credit risk. The portfolio of notes is principally collateralized by self-storage facilities and commercial properties. We have not experienced any material losses related to the notes from individual or groups of notes in any particular industry or geographic area. The estimated fair values were determined using the discounted cash flow method and using interest rates currently offered for similar loans to borrowers with similar credit ratings. Other investments including short-term investments are substantially current or bear reasonable interest rates. As a result, the carrying values of these financial instruments approximate fair value. The carrying values and estimated fair values for the financial instruments stated above and their placement in the fair value hierarchy are as follows:       Fair Value Hierarchy As of March 31, 2023   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 189,498 $ – $ – $ 189,498 $ 189,498 Mortgage loans, net   466,531   –   –   444,957   444,957 Other investments   109,009   –   –   109,009   109,009 Total $ 765,038 $ – $ – $ 743,464 $ 743,464                                             Liabilities                     Notes, loans and finance leases payable $ 6,143,350 $ – $ 5,710,735 $ – $ 5,710,735 Total $ 6,143,350 $ – $ 5,710,735 $ – $ 5,710,735   .   Fair Value Hierarchy As of March 31, 2022   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 229,343 $ – $ – $ 229,343 $ 229,343 Mortgage loans, net   423,163   –   –   450,347   450,347 Other investments   120,592   –   –   120,592   120,592 Total $ 773,098 $ – $ – $ 800,282 $ 800,282                                             Liabilities                     Notes, loans and finance leases payable $ 5,875,781   – $ 5,875,781 $ – $ 5,875,781 Total $ 5,875,781 $ – $ 5,875,781 $ – $ 5,875,781 The following tables represent the financial assets and liabilities on the consolidated balance sheets as of March 31, 2023 and 2022, that are measured at fair value on a recurring basis and the level within the fair value hierarchy.   As of March 31, 2023   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 1,809,441 $ 1,808,797 $ 644 $ – Fixed maturities - available for sale   2,709,037   251,832   2,457,146   59 Preferred stock   21,982   21,982   –   – Common stock   39,375   39,375   –   – Derivatives   9,606   4,295   5,311   – Total $ 4,589,441 $ 2,126,281 $ 2,463,101 $ 59                                     Liabilities                 Derivatives $ – $ – $ – $ – Total $ – $ – $ – $ –   As of March 31, 2022   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 2,482,154 $ 2,482,154 $ – $ – Fixed maturities - available for sale   2,821,092   26,914   2,794,086   92 Preferred stock   26,095   26,095   –   – Common stock   46,212   46,212   –   – Derivatives   7,474   7,474   –   – Total $ 5,383,027 $ 2,588,849 $ 2,794,086 $ 92                                     Liabilities                 Derivatives $ 587 $ – $ 587 $ – Total $ 587 $ – $ 587 $ –   The fair value measurement of our assets using significant unobservable inputs (Level 3) were $0.1 million for both March 31, 2023 and 2022, respectively.
v3.23.1
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable Note 17.   Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable During their normal course of business, our insurance subsidiaries assume and cede reinsurance on both a coinsurance and a risk premium basis. They also obtain reinsurance for that portion of risks exceeding their retention limits. The maximum amount of life insurance retained on any one life is $150,000.     Direct Amount (a)   Ceded to Other Companies   Assumed from Other Companies   Net Amount (a)   Percentage of Amount Assumed to Net       (In thousands)   Year ended December 31, 2022                       Life insurance in force $ 970,454 $ 48 $ 304,891 $ 1,275,297   24 % Premiums earned:                       Life $ 52,298 $ 1 $ 4,181 $ 56,478   7 % Accident and health   41,354   152   983   42,185   2 % Annuity   80   –   406   486   84 % Property and casualty   96,242   –   –   96,242   – % Total $ 189,974 $ 153 $ 5,570 $ 195,391                               Year ended December 31, 2021                       Life insurance in force $ 1,029,537 $ 72 $ 328,030 $ 1,357,495   24 % Premiums earned:                       Life $ 56,353 $ 2 $ 4,514 $ 60,865   7 % Accident and health   48,385   160   1,166   49,391   2 % Annuity   444   –   327   771   42 % Property and casualty   89,667   –   –   89,667   – % Total $ 194,849 $ 162 $ 6,007 $ 200,694                               Year ended December 31, 2020                       Life insurance in force $ 1,031,634 $ 73 $ 356,266 $ 1,387,827   26 % Premiums earned:                       Life $ 58,048 $ 1 $ 5,049 $ 63,096   8 % Accident and health   57,081   211   1,388   58,258   2 % Annuity   221   –   34   255   13 % Property and casualty   70,285   –   –   70,285   – % Total $ 185,635 $ 212 $ 6,471 $ 191,894       (a)   Balances are reported net of inter-segment transactions.   Reserves for recognizing a premium deficiency included in future policy benefits are established, if necessary, when the liability for future policy benefits plus the present value of expected future gross premiums are determined to be materially insufficient to provide for expected future policy benefits and expenses. Additionally, in certain instances the policyholder liability for a particular line of business may not be deficient in the aggregate to trigger loss recognition, but the pattern of earnings may be such that profits are expected to be recognized in earlier years followed by losses in later years. In these situations, accounting standards require that an additional liability be recognized by an amount necessary to sufficiently offset the losses that would be recognized in later years. The Company has not recognized any reserves related to premium deficiencies in the years ended December 31, 2022 and December 31, 2021. To the extent that a reinsurer is unable to meet its obligation under the related reinsurance agreements, Repwest would remain liable for the unpaid losses and loss expenses. Pursuant to certain of these agreements, Repwest holds letters of credit as of December 31, 2022 in the amount of $0.1 million from re-insurers. Policy benefits and losses, claims and loss expenses payable for Property and Casualty Insurance were as follows:     December 31,     2022   2021     (In thousands) Unpaid losses and loss adjustment expense $ 151,874 $ 159,162 Reinsurance losses payable   1,133   1,217 Total $ 153,007 $ 160,379   Activity in the liability for unpaid losses and loss adjustment expenses for Property and Casualty Insurance is summarized as follows:       December 31,     2022   2021   2020     (In thousands) Balance at January 1 $ 159,162 $ 177,963 $ 209,127 Less: reinsurance recoverable   47,394   64,873   87,083 Net balance at January 1   111,768   113,090   122,044 Incurred related to:             Current year   27,570   28,980   20,670 Prior years   (5,828)   (6,290)   (3,865) Total incurred   21,742   22,690   16,805 Paid related to:             Current year   10,572   11,040   7,664 Prior years   12,393   12,972   18,095 Total paid   22,965   24,012   25,759 Net balance at December 31   110,545   111,768   113,090 Plus: reinsurance recoverable   41,329   47,394   64,873 Balance at December 31 $ 151,874 $ 159,162 $ 177,963   Prior year incurred losses were impacted by favorable development on numerous Excess Workers Compensation claims. The liability for incurred losses and loss adjustment expenses (net of reinsurance recoverable of $41.3 million) decreased by $7.3 million as of December 31, 2022. The information about property and casualty incurred and paid loss and loss adjustment expense development for the years ended December 31, 2016 through 2022, and the average annual percentage payout of incurred claims by age as of December 31, 2022, is presented as supplementary information. Claims data for December 31, 2016 through 2021 is unaudited. Claims data for December 31, 2022 is audited. Cumulative Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance                                 As of                                 December 31, 2022                                 Total of                                     Incurred-but-                                     Not-Reported                                     Liabilities Plus                                     Expected   Cumulative                                 Development   Number of Accident                               on Reported   Reported Year   2016   2017   2018   2019   2020   2021   2022   Claims   Claims     (In thousands, except claim counts)     2016   13,297   13,011   13,056   11,790   11,764   11,764   11,750   –   11,681 2017       15,748   16,109   17,078   15,538   15,273   15,264   –   12,306 2018           19,580   18,386   18,027   17,157   16,819   –   12,182 2019               22,138   26,316   27,316   27,831   1,663   12,026 2020                   20,671   17,485   17,107   3,653   11,530 2021                       28,982   25,337   5,809   14,150 2022                           27,570   11,076   12,860                             Total   22,201       The following table presents paid claims development as of December 31, 2022, net of reinsurance. Claims data for 2016 through 2021 is unaudited. Claims data for 2022 is audited.   Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance           Accident                             Year   2016   2017   2018   2019   2020   2021   2022 2016   7,777   10,665   11,643   11,746   11,764   11,764   11,750 2017       8,970   11,638   14,825   15,012   15,263   15,264 2018           8,838   12,689   15,150   16,766   16,809 2019               7,366   14,737   19,215   21,598 2020                   7,665   11,114   12,521 2021                       11,040   14,831 2022                           10,572                     Total   Total   103,345 All outstanding liabilities before 2016, net of reinsurance       72,211 Liabilities for claims and claim adjustment expenses, net of reinsurance       110,545 The reconciliation of the net incurred and paid claims development tables for the liability for claims and claims adjustment expenses is as follows:     December 31, 2022     (In thousands) Liabilities for unpaid Property and Casualty claims     and claim adjustment expenses, net of reinsurance $ 110,545       Total reinsurance recoverable on unpaid     Property and Casualty claims $ 41,329       Total gross liability for unpaid Property and Casualty     claims and claim adjustment expense $ 151,874 The following is supplementary information about average historical claims duration as of December 31, 2022. The following is unaudited.   Average Annual Percentage Payout of Incurred Claims by Age, net of Reinsurance     (In percentages)   Years   1   2   3   4   5   6   7   Property and Casualty Insurance  47.2 % 21.1 % 13.6 % 5.1 % 0.7 % – % – %
v3.23.1
Leases
 12 Months Ended
Mar. 31, 2023
Leases [Abstract]  
Leases Of Lessee Disclosure [Text Block] Note 18. Leases We have lease agreements with lease and non-lease components, which are generally not accounted for separately. Additionally, for certain leases, we apply a portfolio approach to account for the operating lease ROU assets and liabilities as the leases are similar in nature and have nearly identical contract provisions.   These leases, which are comprised primarily of storage rental locations, have lease terms up to 88 years, except for easements which are indefinite in term. Covenants include the Company’s responsibility for all maintenance and repairs during the term of the agreement. Our equipment sale/leaseback transactions do not qualify as a sale.   New sale leaseback transactions that fail to qualify as a sale are accounted for as a financial liability. We use our incremental borrowing rate based on information available at commencement date, including the rate for a fully collateralized loan that can either be fully amortized or financed with a residual at the end of the lease term, for a borrower with similar credit quality in order to determine the present value of lease payments. Our lease terms are generally 7 years, may include options to extend or terminate the lease, which are included in the calculation of ROU assets when it is reasonably certain that we will exercise those options. Lease expense for lease payments is recognized on a straight-line basis over the lease term.   Please see Note 9, Borrowings, of the Notes to Consolidated Financial Statements for additional information. The following table shows the components of our right-of-use (“ROU“ assets, net:     As of March 31, 2023     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 128,221 $ 128,221 Furniture and equipment   9,687   –   9,687 Rental trailers and other rental equipment   152,294   –   152,294 Rental trucks   949,838   –   949,838 Right-of-use assets, gross   1,111,819   128,221   1,240,040 Less: Accumulated depreciation   (637,054)   (69,304)   (706,358) Right-of-use assets, net $ 474,765 $ 58,917 $ 533,682       As of March 31, 2022     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 136,444 $ 136,444 Furniture and equipment   14,731   –   14,731 Rental trailers and other rental equipment   169,514   –   169,514 Rental trucks   1,114,248   –   1,114,248 Right-of-use assets, gross   1,298,493   136,444   1,434,937 Less: Accumulated depreciation   (677,669)   (62,062)   (739,731) Right-of-use assets, net $ 620,824 $ 74,382 $ 695,206   As of March 31, 2023 and 2022, we had finance leases for the ROU assets, net of $ 223.2 million and $ 347.4 million, respectively and operating leases of $ 58.4 million and $ 74.2 million, respectively.     Financing leases       March 31,       2023   2022   Weighted average remaining lease term (years)   2   3   Weighted average discount rate   3.8 % 3.7 %       Operating leases       March 31,       2023   2022   Weighted average remaining lease term (years)   19.2   16.5   Weighted average discount rate   4.7 % 4.6 % For fiscal years 2023, 2022 and 2021, cash paid for leases included in our operating cash flow activities were $ 32.1 million, $ 30.2 million and $ 29.3 million, respectively, and our financing cash flow activities were $ 124.2 million, $ 166.3 million and $ 221.2 million, respectively.   Non-cash activities of ROU assets in exchange for lease liabilities were $ 9.5 million, $ 3.7 million and $ 6.8 million for fiscal years 2023, 2022 and 2021, respectively. The components of lease costs, including leases of less than 12 months, were as follows:     Twelve Months Ended March 31,     2023   2022     (In thousands)           Operating lease costs $ 32,878 $ 30,239           Finance lease cost:         Amortization of right-of-use assets $ 81,006 $ 115,199 Interest on lease liabilities   11,199   15,289 Total finance lease cost $ 92,205 $ 130,488   The short-term lease costs for fiscal years 2023 and 2022 were not material. Maturities of lease liabilities were as follows:     Finance leases   Operating leases Year ending March 31,   (In thousands)           2024 $ 110,812 $ 24,338 2025   77,621   11,540 2026   46,763   4,957 2027   –   3,555 2028   –   2,951 Thereafter   –   56,615 Total lease payments   235,196   103,956 Less: imputed interest   (11,991)   (45,583) Present value of lease liabilities $ 223,205 $ 58,373
v3.23.1
Contingencies
 12 Months Ended
Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Contingencies Note 19.   Contingencies Cybersecurity Incident On September 9, 2022, we announced that the Company was made aware of a data security incident involving U-Haul‘s information technology network. U-Haul detected a compromise of two unique passwords used to access U-Haul customers‘ information. U-Haul took immediate steps to contain the incident and promptly enhanced its security measures to prevent any further unauthorized access. U-Haul retained cybersecurity experts and incident response counsel to investigate the incident and implement additional security safeguards. The investigation determined that between November 5, 2021 and April 8, 2022, the threat actor accessed customer contracts containing customers’ names, dates of birth, and driver’s license or state identification numbers. None of U-Haul’s financial, payment processing or email systems were involved. U-Haul has notified impacted customers and relevant governmental authorities. Several class action lawsuits related to the incident have been filed against U-Haul. The lawsuits have been consolidated into one action in the U.S. District Court for the District of Arizona and will be vigorously defended by the Company; however, the outcome of such lawsuits cannot be predicted or guaranteed with any certainty. Environmental Compliance with environmental requirements of federal, state, provincial and local governments may affect Real Estate’s business operations. Among other things, these requirements regulate the discharge of materials into the air, land and water and govern the use and disposal of hazardous substances. Real Estate is aware of issues regarding hazardous substances on some of its properties. Real Estate regularly makes capital and operating expenditures to stay in compliance with environmental laws and has put in place a remedial plan at each site where it believes such a plan is necessary. Based upon the information currently available to Real Estate, compliance with the environmental laws and its share of the costs of investigation and cleanup of known hazardous waste sites are not expected to result in a material adverse effect on the Company’s financial position or results of operations. Other We are named as a defendant in various other litigation and claims arising out of the normal course of business. In management’s opinion, none of these other matters will have a material effect on our financial position and results of operations.
v3.23.1
Related Party Transactions
 12 Months Ended
Mar. 31, 2023
Related Party Transactions [Abstract]  
Related Party Transactions Note 20.   Related Party Transactions As set forth in the Company’s Audit Committee Charter and consistent with the NYSE Listed Company Manual, our Audit Committee (the “Audit Committee”) reviews and maintains oversight over related party transactions, which are required to be disclosed under the SEC rules and regulations and in accordance with GAAP. Accordingly, all such related party transactions are submitted to the Audit Committee for ongoing review and oversight. Our internal processes are designed to ensure that our legal and finance departments identify and monitor potential related party transactions that may require disclosure and Audit Committee oversight. U-Haul Holding Company has engaged in related party transactions and has continuing related party interests with certain major stockholders, directors and officers of the consolidated group as disclosed below. SAC Holding Corporation and SAC Holding II Corporation (collectively “SAC Holdings”) were established in order to acquire and develop self-storage properties. These properties are being managed by us pursuant to management agreements.   SAC Holdings, Four SAC Self-Storage Corporation, Five SAC Self-Storage Corporation, Galaxy Investments, L.P. and 2015 SAC Self-Storage, LLC are substantially controlled by Blackwater Investments, Inc. (“Blackwater”). Blackwater is wholly owned by Willow Grove Holdings LP, which is owned by Mark V. Shoen (a significant stockholder), and various trusts associated with Edward J. Shoen (our Chairman of the Board, President and a significant stockholder) and Mark V. Shoen. Related Party Revenues     Years Ended March 31,     2023   2022   2021     (In thousands) U-Haul management fee revenue from Blackwater $ 29,825 $ 28,546 $ 25,512 U-Haul management fee revenue from Mercury   7,248   6,648   6,091   $ 37,073 $ 35,194 $ 31,603   We currently manage the self-storage properties owned or leased by Blackwater and Mercury Partners, L.P. (“Mercury”), pursuant to a standard form of management agreement, under which we receive a management fee of between 4 % and 10 % of the gross receipts plus reimbursement for certain expenses. We received management fees, exclusive of reimbursed expenses, of $ 37.0 million, $ 38.5 million and $ 31.2 million from the above-mentioned entities during fiscal 2023, 2022 and 2021, respectively. The decrease in management fees received in fiscal 2023 compared with fiscal 2022 was due to a timing difference of the incentive fee of $ 4.0 million being paid in March of fiscal 2022.   This management fee is consistent with the fee received for other properties we previously managed for third parties. Mark V. Shoen controls the general partner of Mercury. The limited partner interests of Mercury are owned indirectly by James P. Shoen and various trusts benefitting Edward J. Shoen and James P. Shoen or their descendants.   Mercury holds the option to purchase a portfolio of properties currently leased by Mercury and a U-Haul subsidiary, which option is exercisable in 2024. Mercury has notified W.P. Carey, the lessor, of its intent to purchase these properties. Related Party Costs and Expenses     Years Ended March 31,     2023   2022   2021     (In thousands) U-Haul lease expenses to Blackwater $ 2,416 $ 2,445 $ 2,612 U-Haul commission expenses to Blackwater   88,067   88,288   69,212   $ 90,483 $ 90,733 $ 71,824 We lease space for marketing company offices, vehicle repair shops and hitch installation centers from subsidiaries of Blackwater. The terms of the leases are similar to the terms of leases for other properties owned by unrelated parties that are leased to us. As of March 31, 2023, subsidiaries of Blackwater acted as U-Haul independent dealers. The financial and other terms of the dealership contracts with the aforementioned companies and their subsidiaries are substantially identical to the terms of those with our other independent dealers whereby commissions are paid by us based upon equipment rental revenues. These agreements with subsidiaries of Blackwater, excluding Dealer Agreements, provided revenues of $ 29.8 million, $ 28.5 million and $ 25.5 million, expenses of $ 2.4 million, $ 2.4 million and $ 2.6 million and cash flows of $ 27.4 million, $ 25.9 million and $ 22.6 million during fiscal 2023, 2022 and 2021, respectively.   Revenues were $ 418.9 million, $ 417.9 million and $ 323.8 million and commission expenses were $ 88.1 million, $ 88.3 million and $ 69.2 million, respectively, related to Dealer Agreements for fiscal 2023, 2022 and 2021. Management determined that we do not have a variable interest pursuant to the VIE model under ASC 810 in the holding entities of Blackwater. Related Party Assets     March 31,     2023   2022     (In thousands) U-Haul receivable from Blackwater $ 42,141 $ 41,364 U-Haul receivable from Mercury   8,402   5,708 Other (a)   (2,235)   779   $ 48,308 $ 47,851 (a) Timing differences for intercompany balances with insurance subsidiaries resulting from the three month difference in reporting periods.
v3.23.1
Statutory Financial Information of Insurance Subsidiaries
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Statutory Financial Information of Insurance Subsidiaries Note 21.   Statutory Financial Information of Insurance Subsidiaries Applicable laws and regulations of the States of Arizona and Nevada require Property and Casualty Insurance and Life Insurance to maintain minimum capital and surplus determined in accordance with statutory accounting principles. Audited statutory net income and statutory capital and surplus for the years ended are listed below:     Years Ended December 31,     2022   2021   2020     (In thousands) Repwest:             Audited statutory net income $ 34,963 $ 33,314 $ 22,898 Audited statutory capital and surplus   294,515   266,875   227,380 ARCOA:             Audited statutory net income (loss)   2,319   (752)   2,438 Audited statutory capital and surplus   13,340   14,697   15,928 Oxford:             Audited statutory net income (loss)   (771)   23,217   6,296 Audited statutory capital and surplus   227,667   230,202   218,301 CFLIC:             Audited statutory net income   3,637   6,019   8,082 Audited statutory capital and surplus   20,591   17,098   25,980 NAI:             Audited statutory net income   1,017   1,874   2,127 Audited statutory capital and surplus   8,906   7,961   13,980   The amount of dividends that can be paid to shareholders by insurance companies domiciled in the State of Arizona is limited. There are restrictions on the ability of our insurance subsidiaries to transfer funds to us in the form of cash dividends, loans or advances. Their ordinary dividends are limited to the lower of 10% of prior year statutory surplus or prior year net income. Any extraordinary dividend, loans or advances to us from the insurance subsidiaries must be approved by the domiciliary insurance commissioner. Any dividend in excess of the limit requires prior regulatory approval. The statutory surplus for Repwest as of December 31, 2022 that could be distributed as ordinary dividends was $29.5 million. Oxford had a statutory net loss as of December 31, 2022, so no dividends can be distributed in calendar year 2023. Repwest paid a dividend of $22.6 million to U-Haul Holding Company during fiscal 2021. Repwest did not pay a dividend to U-Haul Holding Company in fiscal 2023 or 2022. Oxford paid a dividend of $18.6 million to U-Haul Holding Company during fiscal 2021.   Oxford did not pay a dividend to U-Haul Holding Company in fiscal 2023 or 2022. Restricted net assets for our insurance subsidiaries were $95.8 million and $91.7 million as of December 31, 2022 and 2021, respectively. For our insurance subsidiaries, statutory accounting principles (“SAP”) differ from GAAP primarily in that: (i) premiums from deferred annuities are recognized as revenue under SAP, while they are accounted for as liabilities from investment contracts under GAAP; (ii) policy acquisition costs are expensed as incurred under SAP, while they are deferred and amortized over the effective period of the related life insurance policies or the present value of actual and expected gross profits from annuity deposits; (iii) policy benefits and losses are established using different actuarial assumptions; and (iv) investments are valued on a different basis and valuation allowances attributable to investments are different. In addition, certain assets are not admitted under SAP and are charged directly to surplus.
v3.23.1
Financial Information by Geographic Area Data
 12 Months Ended
Mar. 31, 2023
Segments, Geographical Areas [Abstract]  
Industry Segment and Geographic Area Data Note 22.   Financial Information by Geographic Area     United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2023             Total revenues $ 5,570,264 $ 294,427 $ 5,864,691 Depreciation and amortization, net of gains on disposal   514,043   6,272   520,315 Interest expense   221,008   2,950   223,958 Pretax earnings   1,178,264   39,659   1,217,923 Income tax expense   285,724   9,201   294,925 Identifiable assets   17,453,015   671,633   18,124,648       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2022             Total revenues $ 5,452,027 $ 287,720 $ 5,739,747 Depreciation and amortization, net of gains on disposal   509,517   2,969   512,486 Interest expense   163,586   3,838   167,424 Pretax earnings   1,431,155   44,342   1,475,497 Income tax expense   342,213   9,998   352,211 Identifiable assets   16,776,070   523,511   17,299,581       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2021             Total revenues $ 4,334,083 $ 207,902 $ 4,541,985 Depreciation and amortization, net of gains on disposal   631,344   10,160   641,504 Interest expense   160,429   3,073   163,502 Pretax earnings   773,030   23,628   796,658 Income tax expense   180,845   4,957   185,802 Identifiable assets   14,212,978   438,628   14,651,606
v3.23.1
Consolidating Financial Information by Industry Segment
 12 Months Ended
Mar. 31, 2023
Segment Reporting [Abstract]  
Consolidating Financial Information by Industry Segment Note 22A.   Consolidating Financial Information by Industry Segment U-Haul Holding Company’s three reportable segments are: Moving and Storage, comprised of U-Haul Holding Company, U-Haul, and Real Estate and the subsidiaries of U-Haul and Real Estate; Property and Casualty Insurance, comprised of Repwest and its subsidiaries and ARCOA; and Life Insurance, comprised of Oxford and its subsidiaries. Management tracks revenues separately, but does not report any separate measure of the profitability for rental vehicles, rentals of self-storage spaces and sales of products that are required to be classified as a separate operating segment and accordingly does not present these as separate reportable segments. Deferred income taxes, net are shown as liabilities on the consolidating statements. The information includes elimination entries necessary to consolidate U-Haul Holding Company, the parent, with its subsidiaries. Investments in subsidiaries are accounted for by the parent using the equity method of accounting.
v3.23.1
Revenue Recognition
 12 Months Ended
Mar. 31, 2023
Revenue From Contract With Customer [Abstract]  
Revenue Recognition Note 23.   Revenue Recognition Revenue Recognized in Accordance with ASC Topic 606 ASC Topic 606, Revenue from Contracts with Customers (Topic 606) , outlines a five-step model for entities to use in accounting for revenue arising from contracts with customers. The standard applies to all contracts with customers except for leases, insurance contracts, financial instruments, certain nonmonetary exchanges and certain guarantees. The standard also requires disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. We entered into contracts that may include various combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. Revenue is recognized net of amounts collected from customers for taxes, such as sales tax, and remitted to the applicable taxing authorities. We account for a contract under Topic 606 when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For contracts scoped into this standard, revenue is recognized when (or as) the performance obligations are satisfied by means of transferring goods or services to the customer as applicable to each revenue stream as discussed below. There were no material contract assets or liabilities for fiscal 2023. Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. The performance obligations identified for this portfolio of contracts include moving and storage product sales, installation services and/or propane sales. Each of these performance obligations has an observable stand-alone selling price. We concluded that the performance obligations identified are satisfied at a point in time. The basis for this conclusion is that the customer does not receive the product/propane or benefit from the installation services until the related performance obligation is satisfied. These products/services being provided have an alternative use as they are not customized and can be sold/provided to any customer. In addition, we only have the right to receive payment once the products have been transferred to the customer or the installation services have been completed. Although product sales have a right of return policy, our estimated obligation for future product returns is not material to the financial statements at this time. Property management fees are recognized over the period that agreed-upon services are provided. The performance obligation for this portfolio of contracts is property management services, which represents a series of distinct days of service, each of which is comprised of activities that may vary from day to day. However, those tasks are activities to fulfill the property management services and are not separate promises in the contract. We determined that each increment of the promised service is distinct. This is because the customer can benefit from each increment of service on its own and each increment of service is separately identifiable because no day of service significantly modifies or customizes another and no day of service significantly affects either the entity’s ability to fulfill another day of service or the benefit to the customer of another day of service. As such, we concluded that the performance obligation is satisfied over time. Additionally, in certain contracts the Company has the ability to earn an incentive fee based on operational results. We measure and recognize the progress toward completion of the performance obligation on a quarterly basis using the most likely amount method to determine an accrual for the incentive fee portion of the compensation received in exchange for the property management service. The variable consideration recognized is subject to constraints due to a range of possible consideration amounts based on actual operational results. Other revenue consists of numerous services or rentals, of which U-Box contracts and service fees from Moving Help® are the main components. The performance obligations identified for U-Box contracts are fees for rental, storage and shipping of U-Box containers to a specified location, each of which are distinct. A contract may be partially within the scope of Topic 606 and partially within the scope of other topics. The rental and storage obligations in U-Box contracts meet the definition of a lease in Topic 842, while the shipping obligation represents a contract with a customer accounted for under Topic 606. Therefore, we allocate the total transaction price between the performance obligations of storage fees and rental fees and the shipping fees on a standalone selling price basis. U-Box shipping fees are collected once the shipment is in transit. Shipping fees in U-Box contracts are set at the initiation of the contract based on the shipping origin and destination, and the performance obligation is satisfied over time. U-Box shipping contracts span over a relatively short period of time, and the majority of these   contracts begin and end within the same fiscal year. Moving Help ® services fees are recognized in accordance with Topic 606. Moving Help services are generated as we provide a neutral venue for the connection between the service provider and the customer for agreed upon services. We do not control the specified services provided by the service provider before that service is transferred to the customer. Revenue Recognized in Accordance with Topic 842 The Company’s self-moving rental revenues meet the definition of a lease pursuant to the guidance in Topic 842 because those substitution rights do not provide an economic benefit to the Company that would exceed the cost of exercising the right.   Self-moving rentals are recognized over the contract period that trucks and moving equipment are rented. We offer two types of self-moving rental contracts, one-way rentals and in-town rentals, which have varying payment terms. Customer payment is received at the initiation of the contract for one-way rentals which covers an allowable limit for equipment usage. An estimated fee in the form of a deposit is received at the initiation of the contract for in-town rentals, and final payment is received upon the return of the equipment based on actual fees incurred. The contract price is estimated at the initiation of the contract, as there is variable consideration associated with ratable fees incurred based on the number of days the equipment is rented and the number of miles driven. Variable consideration is estimated using the most likely amount method which is based on the intended use of the rental equipment by the customer at the initiation of the contract. Historically, the variability in estimated transaction pricing compared to actual is not significant due to the relatively short duration of rental contracts. Each performance obligation has an observable stand-alone selling price. The input method of passage of time is appropriate as there is a direct relationship between our inputs and the transfer of benefit to the customer over the life of the contract. Self-moving rental contracts span a relatively short period of time, and the majority of these contracts began and ended within the same fiscal year. Self-storage revenues are recognized as earned over the contract period based upon the number of paid storage contract days. We lease portions of our operating properties to tenants under agreements that are classified as operating leases. We recognize the total minimum lease payments provided for under the leases on a straight-line basis over the lease term. Generally, under the terms of our leases, the majority of our rental expenses, including common area maintenance, real estate taxes and insurance, are recovered from our customers. The following table summarizes the minimum lease payments due from our customers and operating property tenants on leases for the next five years and thereafter:       Year Ended March 31,     2024   2025   2026   2027   2028   Thereafter           (In thousands)                           Self-moving equipment rentals $ 5,750 $ – $ – $ – $ – $ – Property lease revenues   19,223   12,378   9,552   7,680   5,050   38,998 Total $ 24,973 $ 12,378 $ 9,552 $ 7,680 $ 5,050 $ 38,998   The amounts above do not reflect future rental revenue from the renewal or replacement of existing leases. Revenue Recognized in Accordance with Other Topics Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Property and casualty insurance premiums are recognized as revenue over the policy periods. Interest and investment income are recognized as earned. Net investment and interest income has multiple components. Interest income from bonds and mortgage notes are recognized when earned. Dividends on common and preferred stocks are recognized on the ex-dividend dates. Realized gains and losses on the sale or exchange of investments are recognized at the trade date. In the following tables, the revenue is disaggregated by timing of revenue recognition:       Years Ended March 31,     2023   2022   2021           (In thousands)               Revenues recognized over time $   320,822 $   284,401 $   182,278 Revenues recognized at a point in time   425,584   414,985   396,600 Total revenues recognized under ASC 606   746,406   699,386   578,878               Revenues recognized under ASC 842   4,744,746   4,690,434   3,644,798 Revenues recognized under ASC 944   196,860   201,666   195,371 Revenues recognized under ASC 320   176,679   148,261   122,938 Total revenues $   5,864,691 $   5,739,747 $   4,541,985   In the above table, the revenues recognized over time include property management fees, the shipping fees associated with U-Box rentals and a portion of other revenues. Revenues recognized at a point in time include self-moving equipment rentals, self-moving and self-storage products and service sales and a portion of other revenues. We recognized liabilities resulting from contracts with customers for self-moving equipment rentals, self-storage revenues, U-Box revenues and tenant revenues, in which the length of the contract goes beyond the reported period end, although rental periods of the equipment, storage and U-Box contract are generally short-term in nature. The timing of revenue recognition results in liabilities that are reflected in deferred income on the balance sheet.
v3.23.1
Allowance for Credit Losses
 12 Months Ended
Mar. 31, 2023
Allowance For Credit Loss [Abstract]  
Allowance For Credit Losses [Text Block] Note 24 . Allowance for Credit Losses Mortgage loans, net Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at amortized cost.   Modeling for the Company’s mortgage loans is based on inputs most highly correlated to defaults, including loan-to-value, occupancy, and payment history.   Historical credit loss experience provides additional support for the estimation of expected credit losses. In assessing the credit losses, the portfolio is reviewed on a collective basis, using loan-specific cash flows to determine the fair value of the collateral in the event of default.   Adjustments to this analysis are made to assess loans with a loan-to-value of 65% or greater. These loans are evaluated on an individual basis and loan specific risk characteristics such as occupancy levels, expense, income growth and other relevant available information from internal and external sources relating to past events, current conditions, and reasonable and supportable forecasts. When management determines that credit losses are expected to occur, an allowance for expected credit losses based on the fair value of the collateral is recorded. Reinsurance recoverables Reinsurance recoverable on paid and unpaid benefits was less than 1% of the total assets as of January 1, 2022 which is immaterial based on historical loss experience and high credit rating of the reinsurers. Premium receivables Premiums receivables   were $ 4.1 million and $ 1.7 million as of December 31, 2022 and 2021, respectively, in which the credit loss allowance is immaterial based on our ability to cancel the policy if the policyholder doesn‘t pay premiums. The following details the changes in the Company’s reserve allowance for credit losses for trade receivables, fixed maturities and investments, other:       Allowance for Credit Losses     Trade Receivables   Investments, Fixed Maturities   Investments, other   Total                       (In thousands)     Balance as of March 31, 2021 $ 4,421 $ 1,320 $ 501 $ 6,242 Provision for (reversal of) credit losses   4,228   (1,260)   –   2,968 Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of March 31, 2022 $ 8,649 $ 60 $ 501 $ 9,210 Provision for (reversal of) credit losses   (4,860)   2,041   16   (2,803) Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of March 31, 2023 $ 3,789 $ 2,101 $ 517 $ 6,407
v3.23.1
Notes to Condensed Financial Information - U-Haul Holding Company [Member]
 12 Months Ended
Mar. 31, 2023
1. Summary of Significant Accounting Policies U-Haul Holding Company, a Nevada corporation, was incorporated in April, 1969, and is the holding Company for U-Haul International, Inc., Amerco Real Estate Company, Repwest Insurance Company and Oxford Life Insurance Company. The financial statements of the Registrant should be read in conjunction with the Consolidated Financial Statements and notes thereto included in this Annual Report. U-Haul Holding Company is included in a consolidated Federal income tax return with all of its U.S. subsidiaries. Accordingly, the provision for income taxes has been calculated for Federal income taxes of U-Haul Holding Company and subsidiaries included in the consolidated return of U-Haul Holding Company. State taxes for all subsidiaries are allocated to the respective subsidiaries. The financial statements include only the accounts of U-Haul Holding Company, which include certain of the corporate operations of U-Haul Holding Company. The interest in U-Haul Holding Company’s majority owned subsidiaries is accounted for using the equity method. The intercompany interest income and expenses are eliminated in the Consolidated Financial Statements.
2. Guarantees U-Haul Holding Company has guaranteed performance of certain long-term leases and other obligations. See Note 18, Leases, and Note 20, Related Party Transactions, of the Notes to Consolidated Financial Statements.
v3.23.1
Schedule II - U-Haul Holding Company and Consolidated Subsidiaries Valuation and Qualifying Accounts
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block] SCHEDULE II U-Haul Holding Company AND CONSOLIDATED SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS       Balance at Beginning of Year   Additions Charged to Costs and Expenses   Additions Charged to Other Accounts   Deductions   Balance at Year End                       Year ended March 31, 2023   (In thousands) Allowance for obsolescence                     (deducted from inventory) $ 1,080 $ – $ – $ (151) $ 929 Allowance for LIFO                     (deducted from inventory) $ 37,400 $ 9,665 $ – $ – $ 47,065                       Year ended March 31, 2022     Allowance for obsolescence                     (deducted from inventory) $ 1,416 $ – $ – $ (336) $ 1,080 Allowance for LIFO                     (deducted from inventory) $ 21,832 $ 15,568 $ – $ – $ 37,400                       Year ended March 31, 2021                     Allowance for credit losses                     (deducted from trade receivable) $ 535 $ 2,179 $ 2,680 $ (973) $ 4,421 Allowance for obsolescence                     (deducted from inventory) $ 3,063 $ – $ – $ (1,647) $ 1,416 Allowance for LIFO                     (deducted from inventory) $ 18,886 $ 2,946 $ – $ – $ 21,832 Allowance for probable losses                     (deducted from mortgage loans)$ 493 $ – $ – $( 45 )$ 448
v3.23.1
Schedule V - Supplemental Information (for Property-Casualty Insurance Operations)
 12 Months Ended
Mar. 31, 2023
Disclosure Text Block [Abstract]  
Schedule Of Supplemental Information For Property Casualty Insurance Underwriters [Text Block] SCHEDULE V U-Haul Holding Company AND CONSOLIDATED SUBSIDIARIES SUPPLEMENTAL INFORMATION (FOR PROPERTY-CASUALTY INSURANCE Operations) Years Ended December 31, 2022, 2021, AND 2020   Fiscal Year   Affiliation with Registrant   Deferred Policy Acquisition Cost   Reserves for Unpaid Claims and Adjustment Expenses   Discount if any, Deducted   Unearned Premiums   Net Earned Premiums (1)   Net Investment Income (2)   Claim and Claim Adjustment Expenses Incurred Related to Current Year   Claim and Claim Adjustment Expenses Incurred Related to Prior Year   Amortization of Deferred Policy Acquisition Costs   Paid Claims and Claim Adjustment Expense   Net Premiums Written (1) (In thousands) 2023   Consolidated property casualty entity $ – $ 151,874 $ –   (97) $ 96,242 $ 7,314 $ 27,570 $ (5,828) $ – $ 22,965 $ 96,145 2022   Consolidated property casualty entity   –   159,162   –   334   89,667   24,385   28,980   (6,290)   –   24,012   90,002 2021   Consolidated property casualty entity   –   177,963   –   (294)   70,285   16,335   20,670   (3,865)   –   25,759   69,989   (1)The earned and written premiums are reported net of intersegment transactions. There were $2.9 million, $3.1 million and $1.5 million in written premiums and $3.0 million, $2.8 million and $1.8 million in earned premiums eliminated for the years ended December 31, 2022, 2021 and 2020, respectively. (2) Net Investment Income excludes net realized (gains) losses on investments of $0.1 million, ($1.0) million and ($0.1) million for the years ended December 31, 2022, 2021 and 2020, respectively.
v3.23.1
Accounting Policies (Policy Text Block)
 12 Months Ended
Mar. 31, 2023
Policy Text Block [Abstract]  
Use of Estimates Use of Estimates The preparation of financial statements in conformity with the generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. The accounting policies that we deem most critical to us and that require management’s most difficult and subjective judgments include the principles of consolidation, the recoverability of property, plant and equipment, the adequacy of insurance reserves, the recognition and measurement of impairments for investments accounted for under ASC 320 - Investments - Debt and Equity Securities and the recognition and measurement of income tax assets and liabilities. The actual results experienced by us may materially differ from management’s estimates.
Cash and Cash Equivalents Cash and Cash Equivalents We consider cash equivalents to be highly liquid debt securities with insignificant interest rate risk with original maturities from the date of purchase of three months or less. Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash deposits. Accounts at each United States financial institution are insured by the Federal Deposit Insurance Corporation up to $ 250,000 . Accounts at each Canadian financial institution are insured by the Canada Deposit Insurance Corporation up to $ 100,000 CAD per account. As of March 31, 2023 and March 31, 2022, we held cash equivalents in excess of these insured limits. To mitigate this risk, we select financial institutions based on their credit ratings and financial strength.
Investments Investments Fixed Maturities and Marketable Equities. Fixed maturity investments consist of either marketable debt, equity or redeemable preferred stocks. As of the balance sheet dates, all of our investments in these securities were classified as available-for-sale. Available-for-sale investments are reported at fair value, with unrealized gains or losses recorded net of taxes and applicable adjustments to accumulated other comprehensive income (loss) in stockholders’ equity.  For available-for-sale debt securities in an unrealized loss position, we first assess whether the security is below investment grade. For securities that are below investment grade, we evaluate whether the decline in fair value has resulted from credit losses or other factors such as the interest rate environment. Declines in value due to credit are recognized as an allowance. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse market conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, cumulative default rates based on ratings are used to determine the potential cost of default, by year. The present value of these potential costs is then compared to the amortized cost of the security to determine the credit loss, limited by the amount that the fair value is less   than the amortized cost basis. Declines in fair value that have not been recorded through an allowance for credit losses, such as declines due to changes in market interest rates, are recorded through accumulated other comprehensive income, net of applicable taxes. If we intend to sell a security, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis, the security is written down to its fair value and the write down is charged against the allowance for credit losses, with any incremental impairment reported in earnings. Reversals of the allowance for credit losses are permitted and should not exceed the allowance amount initially recognized.   Changes in the market value of common stocks are recognized in earnings. Fair value for these investments is based on quoted market prices, dealer quotes or discounted cash flows. The cost of investments sold is based on the specific identification method. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Mortgage Loans and Notes on Real Estate. Mortgage loans and notes on real estate are reported at their unpaid balance, net of any allowance for expected losses and any unamortized premium or discount. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Recognition of Investment Income. Interest income from bonds and mortgage notes is recognized when earned. Dividends on common and preferred stocks are recognized on the ex-dividend dates. Realized gains and losses on the sale or exchange of investments are recognized at the trade date.
Derivative Financial Instruments Accrued Interest Receivable Accrued interest receivables on available-for-sale securities totaled $29.6 million and $28.7 million as of December 31, 2022 and 2021, respectively and are excluded from the estimate of credit losses. We have elected not to measure an allowance on accrued interest receivables as our practice is to write off the uncollectible balance that are 90 days or more past due. Furthermore, we have elected to write off accrued interest receivables by reversing interest income. Derivative Financial Instruments Our objective for holding derivative financial instruments is to manage interest rate risk exposure primarily through entering interest rate swap agreements and call options. We do not enter into these instruments for trading purposes. Counterparties to the interest rate swap agreements are major financial institutions. We have elected to apply hedge accounting to our derivatives. Derivatives that are designated in hedging relationships are evaluated for effectiveness using regression analysis at the time they are designated and throughout the hedge period. Derivatives are recognized at fair value on the balance sheet and are classified as prepaid expenses (asset) or accrued expenses (liability). Derivatives that are not designated as cash flow hedges for accounting purposes must be adjusted to fair value through income. If the derivative qualifies and is designated as a cash flow hedge, changes in its fair value will be recorded in accumulated other comprehensive income (loss) (“AOCI”), upon the maturity of the hedge relationship, amounts remaining in AOCI are released to earnings. When the cash flow hedge is de-designated, or when the derivative is terminated before maturity, the fair value adjustment to the hedged debt continues to be reported as part of the carrying value of the debt and is recognized in interest expense over the remaining life. See Note 11, Derivatives, of the Notes to Consolidated Financial Statements.
Inventory, net Inventories and parts, net Inventories and parts, net were as follows:       March 31,     2023   2022     (In thousands) Truck and trailer parts and accessories (a) $ 150,319 $ 148,237 Hitches and towing components (b)   30,927   32,508 Moving supplies and propane (b)   18,222   16,623 Subtotal   199,468   197,368 Less: LIFO reserves   (47,065)   (37,400) Less: excess and obsolete reserves   (929)   (1,080) Total $ 151,474 $ 158,888           (a) Primarily held for internal usage, including equipment manufacturing and repair (b) Primarily held for retail sales         Inventories consist primarily of truck and trailer parts and accessories used to manufacture and repair rental equipment as well as products and accessories available for retail sale. Inventory is held at our owned locations; our independent dealers do not hold any of our inventory. Inventories are stated at the lower of cost or net realizable value. Inventory cost is primarily determined using the last-in first-out method (“LIFO”). Inventories valued using LIFO consisted of approximately 94 % and 93 % of the total inventories for March 31, 2023 and 2022, respectively. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $ 47.1 million and $ 37.4 million higher as of March 31, 2023 and 2022, respectively. In fiscal 2023, 2022 and 2021, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 1.6 million, $ 0.1 million and $ 0.4 million, respectively.
Property, Plant and Equipment Property, Plant and Equipment Our property, plant and equipment is stated at cost. Interest expense, if any, incurred during the initial construction of buildings is considered part of cost. Depreciation is computed for financial reporting purposes using the straight line or an accelerated method based on a declining balance formula over the following estimated useful lives: rental equipment 2-20 years and buildings and non-rental equipment 3-55 years. Routine maintenance costs are charged to operating expense as they are incurred. Gains and losses on dispositions of property, plant and equipment, other than real estate (“personal property”), are netted against depreciation expense when realized. The net amount of gains, netted against depreciation expense, were $ 247.1 million, $ 214.2 million and $ 54.1 million during fiscal 2023, 2022 and 2021, respectively. Equipment depreciation is recognized in amounts expected to result in the recovery of estimated residual values upon disposal, i.e., minimize gains or losses. In determining the depreciation rate, historical disposal experience, holding periods and trends in the market for vehicles are reviewed. We regularly perform reviews to determine whether facts and circumstances exist which indicate that the carrying amount of assets, including estimates of residual value, may not be recoverable or that the useful life of assets are shorter or longer than originally estimated. Reductions in residual values (i.e., the price at which we ultimately expect to dispose of revenue earning equipment) or useful lives will result in an increase in depreciation expense over the remaining life of the equipment. Reviews are performed based on vehicle class, generally the subcategories of trucks and trailers. We assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their estimated remaining lives against their respective carrying amounts. We consider factors such as current and expected future market price trends on used vehicles and the expected life of vehicles included in the fleet. Impairment, if any, is based on the excess of the carrying amount over the fair value of those assets. If asset residual values are determined to be recoverable, but the useful lives are shorter or longer than originally estimated, the net book value of the assets is depreciated over the newly determined remaining useful lives. For our box truck fleet we utilize an accelerated method of depreciation based upon a declining formula. Under the declining balances method (2.4 times declining balance), the book value of a rental truck is reduced approximately 16 %, 13 %, 11 %, 9 %, 8 %, 7 %, and 6 % during years one through seven, respectively and then reduced on a straight line basis to a salvage value of 15 % by the end of year fifteen. Comparatively, a standard straight line approach would reduce the book value by approximately 5.7 % per year over the life of the truck. Although we intend to sell our used vehicles for prices approximating book value, the extent to which we realize a gain or loss on the sale of used vehicles is dependent upon various factors including, but not limited to, the general state of the used vehicle market, the age and condition of the vehicle at the time of its disposal and the depreciation rates with respect to the vehicle . We typically sell our used vehicles at our sales centers throughout the United States and Canada, on our website at uhaul.com/trucksales or by phone at 1-866-404-0355. Additionally, we sell a large portion of our pickup and cargo van fleet at automobile dealer auctions. In addition to our property, plant and equipment, we had real estate held for future development or use of $ 72.2 million and $ 67.8 million for fiscal 2023 and 2022, respectively, which is included in Investments, other and are held at cost.
Receivables Receivables Trade receivables include trade accounts from moving and self-storage customers and dealers, insurance premiums and amounts due from re-insurers, less management’s estimate of expected losses. Moving and Storage has two (2) primary components of trade receivables, receivables from corporate customers and credit card receivables from sales and rentals of equipment.   For credit card receivables, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivables. The Company rents equipment to corporate customers in which payment terms are 30 days. The Company performs ongoing credit evaluations of its customers and assesses each customer’s credit worthiness. In addition, the Company monitors collections and payments from its customers and maintains an allowance based upon applying an expected credit loss rate to receivables based on the historical loss rate from similar high risk customers adjusted for current conditions, including any specific customer collection issues identified, and forecasts of economic conditions. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. Management believes that the historical loss information it has compiled is a reasonable base on which to determine expected credit losses for trade receivables because the composition of trade receivables as of that date is consistent with that used in developing the historical credit-loss percentages (i.e., the similar risk characteristics of its customers and its lending practices have not changed significantly over time). To adjust the historical loss rates to reflect the effects of these differences in current conditions and forecasted changes, management assigns a rating to each customer which varies depending on the assessment of risk.   Management estimated the loss rate at approximately 4% and 6% as of March 31, 2023 and 2022, respectively. Management developed this estimate based on its knowledge of past experience. As a result, management applied the applicable credit loss rates to determine the expected credit loss estimate for each aging category. Insurance premiums receivable for policies that are billed through contracted agents are recorded net of commissions payable. A commission payable is recorded as a separate liability for those premiums that are billed direct. Reinsurance recoverables include case reserves and actuarial estimates of claims incurred but not reported ("IBNR"). These receivables are not expected to be collected until after the associated claim has been adjudicated and billed to the re-insurer. The reinsurance recoverables may have little or no allowance for credit losses due to the fact that reinsurance is typically procured from carriers with strong credit ratings. Furthermore, we do not cede losses to a re-insurer if the carrier is deemed financially unable to perform on the contract. Reinsurance recoverables also include insurance ceded to other insurance companies. The allowance for expected credit losses on trade receivables were $3.8 million and $8.6 million as of March 31, 2023 and 2022, respectively. Notes and mortgage receivables include accrued interest and are reduced by discounts and amounts considered by management to be uncollectible.
Policy Benefits and Losses, Claims and Loss Expenses Payable Policy Benefits and Losses, Claims and Loss Expenses Payable Liabilities for future policy benefits related to life insurance, medical supplement insurance, and deferred annuities are determined by management utilizing the net premium valuation methodology and are accrued when premium revenue is recognized. The liability, which represents the present value of future benefits to be paid to policyholders and related expenses less the present value of future net premiums, is estimated using assumptions applicable at the time the insurance contracts are written, with provisions for the risk of adverse deviation, as appropriate. Assumptions include expected mortality and morbidity experience, policy lapses and surrenders, current asset yields and expenses, and expected interest rate yields. The Company periodically performs a gross premium valuation and reviews original assumptions, including capitalized expenses which reduce the gross premium valuation, to evaluate whether the assets and liabilities are adequate and whether a loss reserve should be recognized. Liabilities for health, disability and other policies include estimates of payments to be made on insurance claims for reported losses and estimates of IBNR losses. Oxford’s liabilities for deferred annuity contracts consist of contract account balances that accrue to the benefit of the policyholders. The consolidated balance sheets include $386.8 million and $399.0 million of liabilities related to these programs as of December 31, 2022 and 2021, respectively. Oxford’s liabilities for fixed rate deferred annuities and fixed equity indexed annuities are reported on the balance sheet as liabilities from investment contracts. These liabilities do not subject the Company to significant mortality or morbidity risk and are stated at the account balance of the policyholder. The consolidated balance sheets include $2,398.9 million and $2,336.2 million of liabilities for these contracts as of December 31, 2022 and 2021, respectively. Property and Casualty Insurance’s liability for reported and unreported losses is based on Repwest’s historical data along with industry averages. The liability for unpaid loss adjustment expenses is based on historical ratios of loss adjustment expenses paid to losses paid. Amounts recoverable from re-insurers on unpaid losses are estimated in a manner consistent with the claim liability associated with the re-insured policy. Adjustments to the liability for unpaid losses and loss expenses as well as amounts recoverable from re-insurers on unpaid losses are charged or credited to expense in the periods in which they are made. Due to the nature of the underlying risks and high degree of uncertainty associated with the determination of the liability for future policy benefits and claims, the amounts to be ultimately paid to settle these liabilities cannot be precisely determined and may vary significantly from the estimated liability, especially for long-tailed casualty lines of business such as excess workers’ compensation.   As a result of the long-tailed nature of the excess workers’ compensation policies written by Repwest during 1983 through 2001, it may take a number of years for claims to be fully reported and finally settled. On a regular basis insurance reserve adequacy is reviewed by management to determine if existing assumptions need to be updated. In determining the assumptions for calculating workers’ compensation reserves, management considers multiple factors including the following: Claimant longevity; Cost trends associated with claimant treatments; Changes in ceding entity and third-party administrator reporting practices; Changes in environmental factors including legal and regulatory; Current conditions affecting claim settlements; and Future economic conditions, including inflation. We have reserved each claim based upon the accumulation of current claim costs projected through each claimant’s life expectancy and then adjusted for applicable reinsurance arrangements.  Management reviews each claim bi-annually, or more frequently if there are changes in facts or circumstances, to determine if the estimated life-time claim costs have increased and then adjusts the reserve estimate accordingly at that time.  We have factored in an estimate of what the potential cost   increases could be in our IBNR liability.   We have not assumed settlement of the existing claims in calculating the reserve amount, unless it is in the final stages of completion. Continued increases in claim costs, including medical inflation and new treatments and medications could lead to future adverse development resulting in additional reserve strengthening.   Conversely, settlement of existing claims or if injured workers return to work or expire prematurely, could lead to future positive development.
Self-Insurance Reserves Self-Insurance Reserves U-Haul retains the risk for certain public liability and property damage programs related to our rental equipment. The consolidated balance sheets include $335.2 million and $330.9 million of liabilities related to these programs as of March 31, 2023 and 2022, respectively. These liabilities are recorded in policy benefits and losses, claims and loss expenses payable. Management takes into account losses incurred based upon actuarial estimates, past experience, current claim trends, as well as social and economic conditions. In the current year, management determined that an adjustment to the self-insurance reserve balance was necessary, as a result of an identification of an inappropriate approach taken that did not adequately consider all applicable inputs in determining the estimate. Upon analysis, this adjustment was considered to not impact the previous years’ income statement presented and as such, management recorded a reduction of the self-insurance reserve by $88 million, net of $20.8 million of tax effect, resulting in an increase to retained earnings of $67.2 million as of March 31, 2022 and 2021. This liability is subject to change in the future based upon changes in the underlying assumptions including claims experience, frequency of incidents, and severity of incidents. Additionally, as of March 31, 2023 and 2022, the consolidated balance sheets include liabilities of $ 21.6 million and $ 19.7 million, respectively, related to medical plan benefits we provide for eligible employees. We estimate this liability based on actual claims outstanding as of the balance sheet date as well as an actuarial estimate of IBNR claims. These amounts are recorded in Accounts payable and accrued expenses on the consolidated balance sheets.
Revenue Recognition Revenue Recognition Self-moving rentals are recognized for the period that trucks and moving equipment are rented. Self-storage revenues, based upon the number of paid storage contract days, are recognized as earned during the period.   Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. Property and casualty insurance premiums are recognized as revenue over the policy periods. Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Interest and investment income are recognized as earned. Amounts collected from customers for sales tax are recorded on a net basis. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements.
Advertising Lessor We have determined that revenues derived by providing self-moving equipment rentals, self-storage rentals and certain other revenues, including U-Box rentals, are within the scope of the accounting guidance contained in Topic 842. We combined all lease and non-lease components of lease contracts for which the timing and pattern of transfer are the same and the lease component meets the classification of an operating lease, and account for them in accordance with Topic 842. The revenue streams accounted for in accordance with Topic 842 are recognized evenly over the period of rental. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements. Lessee We determine if an arrangement is a lease at inception. Operating leases, which are comprised primarily of storage rental locations, with lease terms up to 88 years, except for our easements which are indefinite in term, are included in ROU assets – operating, net and operating lease liabilities in our consolidated balance sheets. Finance leases, which are comprised primarily of rental equipment leases, with primarily 7-year terms are included in ROU assets - financing, net, and notes, loans and finance leases payable, net in our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the expected remaining lease term. We use our incremental borrowing rate based on information available at commencement date, including the rate for a fully collateralized loan that can either be fully amortized or financed with a residual at the end of the lease term, for a borrower with similar credit quality in order to determine the present value of lease payments. Our lease terms may include options to extend or terminate the lease, which are included in the calculation of ROU assets when it is reasonably certain that we will exercise those options. Covenants include the Company’s responsibilty for all maintenance and repairs during the term of the agreement. Lease expense for lease payments is recognized on a straight-line basis over the lease term. We have lease agreements with lease and non-lease components, which are generally not accounted for separately. Additionally, for certain leases, we apply a portfolio approach to account for the operating lease ROU assets and liabilities as the leases are similar in nature and have nearly identical contract provisions. Our equipment sale/leaseback transactions do not qualify as a sale.   New sale leaseback transactions that fail to qualify as a sale are accounted for as a financial liability. Please see Note 18, Leases, of the Notes to Consolidated Financial Statements. Advertising All advertising costs are expensed as incurred. Advertising expenses were $ 11.1 million, $ 13.7 million and $ 18.0 million in fiscal 2023, 2022 and 2021, respectively and are included in operating expenses.
Deferred Policy Acquisition Cost Deferred Policy Acquisition Costs Commissions and other costs that fluctuate with and are primarily related to the successful acquisition or renewal of certain insurance premiums are deferred. For our Life Insurance’s life and health insurance products, these costs are amortized, with interest, in relation to revenue such that costs are realized as a constant percentage of revenue. For its annuity insurance products the costs are amortized, with interest, in relation to the present value of actual and expected gross profits. Starting in fiscal 2014, new annuity contract holders were provided with a sales inducement in the form of a premium bonus (the “Sales Inducement Asset”).   Sales inducements are recognized as an asset with a corresponding increase to the policyholder liability and are amortized in a similar manner to deferred policy acquisition costs (“DAC”).   As of December 31, 2022 and 2021, the Sales Inducement Asset included with DAC amounted to $ 16.6 million and $ 15.7 million, respectively on the consolidated balance sheet and amortization expense totaled $ 3.7 million, $ 4.7 million and $ 4.3 million for the periods ended December 31, 2022, 2021 and 2020, respectively.
Environmental Costs Environmental Costs Liabilities are recorded when environmental assessments and remedial efforts, if applicable, are probable and the costs can be reasonably estimated. The amount of the liability is based on management’s best estimate of undiscounted future costs. Certain recoverable environmental costs related to the removal of underground storage tanks or related contamination are capitalized and amortized over the estimated useful lives of the properties. These costs are capitalized if they improve the safety or efficiency of the property or are incurred in preparing the property for sale.
Income Taxes Income Taxes U-Haul Holding Company files a consolidated tax return with all of its legal subsidiaries. The provision for income taxes reflects deferred income taxes resulting from changes in temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. Deferred tax assets and liabilities represent the future tax consequence for those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses that are available to offset future taxable income. Valuation allowances are established when it is more likely than not that the deferred tax assets will not be realized.
Comprehensive Income (Loss) Earnings Per Share See Note 4, Earnings Per Share, of the Notes to Consolidated Financial Statements. Comprehensive Income (Loss) Comprehensive income (loss), on a tax effected basis, consists of net earnings, foreign currency translation adjustments, unrealized gains and losses on investments, the change in fair value of cash flow hedges and the change in postretirement benefit obligations.
Debt issuance costs Debt Issuance Costs We defer costs directly associated with acquiring third-party financing. Debt issuance costs are deferred and amortized to interest expense using the effective interest method. Debt issuance costs related to our long-term debt are reflected as a direct deduction from the carrying amount of the debt. Please see Note 8, Borrowings, of the Notes to Consolidated Financial Statements.
Adoption of New Accounting Pronouncements Recent Accounting Pronouncements In August 2018, the Financial Accounting Standards Board ( ” FASB ”) issued Accounting Standards Update (“ASU“) 2018-12, Financial Services-Insurance (Topic 944):   Targeted Improvements to the Accounting for Long-Duration Contracts . The updated accounting guidance requires changes to the measurement and disclosure of long-duration contracts. For the Company, this includes all life insurance products, annuities, Medicare Supplement products and our long-term care business. Entities will be required to review, and update if there is a change, cash flow assumptions (including morbidity and persistency) at least annually, and to update discount rate assumptions quarterly using an upper-medium grade fixed-income instrument yield. The effect of changes in cash flow assumptions will be recorded in the Company's results of operations and the effect of changes in discount rate assumptions will be recorded in other comprehensive income. Oxford will adopt the new guidance effective January 1, 2023, using the modified retrospective method applied as of the transition date of January 1, 2021. The Company will use a published spot rate curve constructed from “A”-rated U.S. dollar denominated corporate bonds matched to the duration of the corresponding insurance liabilities, to calculate discount rates. The Company will group its long-duration contracts into calendar year cohorts based on the contract issue date. The most significant impact will be the effect of updating the discount rate assumption quarterly to reflect an upper-medium grade fixed-income instrument yield, rather than Oxford Life’s expected investment portfolio yield. This will be partially offset by the de-recognition of cumulative adjustments to DAC associated with unrealized gains and losses associated with long-duration contracts. DAC and other capitalized costs such as unearned revenue are amortized on a constant level or straight-line basis over the expected term of the contracts. Under ASU 2018-12, the annual amortization of DAC in our Consolidated Statements of Operations will differ from previous trends due to: 1) the requirement to no longer defer renewal commissions until such year as the commissions are actually incurred, 2) the requirement to no longer accrue and amortize interest on our DAC balances, and 3) the modification of the method for amortizing DAC including the updating of assumptions. For business with deferrals of renewal commissions, as is the case with our final expense life insurance policies, the expected amortization rate, as a percentage of premium, for certain blocks of business will no longer be level but will increase over the period of time during which commissions are deferred. The decrease in amortization in the near term will primarily impact our life insurance line of business. Upon adoption, the Company expects an adjustment to AOCI for the removal of cumulative adjustments to DAC associated with unrealized gains and losses previously recorded in AOCI. In total, we expect the impact on net earnings, largely from the decrease in amortization, to be immaterial during 2023, but could become material with a large increase in sales. Market risk benefits, which are contracts or contract features that provide protection to the policyholder from capital market risk and expose the Company to other-than-nominal capital market risk, are measured at fair value.   Market risk benefits are contracts or contract features that guarantee benefits, such as GLWBs, in addition to an account balance which expose insurance companies to other than nominal capital market risk and protect the contract holder from the same risk. Certain contracts or contract features to be identified as market risk benefits are currently accounted for as embedded derivatives and measured at fair value, while others will transition to fair value measurement upon the adoption of ASU 2018-12. Also in consideration of market risk benefits, upon adoption, the Company expects an impact to (1) AOCI for the cumulative effect of changes in the instrument-specific credit risk between contract issue date and transition date and (2) retained earnings for the difference between fair value and carrying value at the transition date, excluding the changes in the instrument-specific credit risk. The requirement to review, and update if there is a change, cash flow assumptions at least annually is expected to change the pattern of earnings being recognized. Adoption will also significantly expand the Company’s disclosures, and will impact systems, processes, and controls. While the requirements of the new guidance represent a material change from existing GAAP, the accounting adoption will have no economic impact on the cash flows of our business nor influence our business model of providing basic mortality and longevity protection-oriented products to the underserved senior market. In addition, it will not impact our statutory earnings, statutory capital, nor our capital management philosophies. The Company expects the net equity impact of these changes will be a decrease of between approximately $ 110.0 million to $ 130.0 million to AOCI as stated as of the transition date of January 1, 2021. As of December 31, 2022 we estimate that the transition date reduction to AOCI will significantly reverse primarily as a result of increases in market interest rates from the January 1, 2021 transition date to December 31, 2022.. While the Company has substantially completed the necessary updates to its valuation models and other systems to implement the standard, the Company’s implementation of the new guidance is continuing to be refined and reviewed. The actual impact of adoption, including the actual tax rates, will be finalized upon completion of the Company’s disclosure and controls procedures regarding the adoption of ASU 2018-12. Therefore, the Company’s estimate of the impact of adoption may be different than the actual impact of adoption. From time to time, new accounting pronouncements are issued by the FASB or the SEC that are adopted by us as of the specified effective date. Unless otherwise discussed, these ASUs entail technical corrections to existing guidance or affect guidance related to specialized industries or entities and therefore will have minimal, if any, impact on our financial position or results of operations upon adoption.
v3.23.1
Accounting Policies (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Inventories, net       March 31,     2023   2022     (In thousands) Truck and trailer parts and accessories (a) $ 150,319 $ 148,237 Hitches and towing components (b)   30,927   32,508 Moving supplies and propane (b)   18,222   16,623 Subtotal   199,468   197,368 Less: LIFO reserves   (47,065)   (37,400) Less: excess and obsolete reserves   (929)   (1,080) Total $ 151,474 $ 158,888      
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Reinsurance Recoverables and Trade Receivables, Net (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Reinsurance Recoverables and Trade Receivables, Net [Abstract]  
Reinsurance Recoverables and Trade Receivables, Net     March 31,     2023   2022     (In thousands) Reinsurance recoverable $ 42,362 $ 50,586 Trade accounts receivable   110,281   150,285 Paid losses recoverable   400   345 Accrued investment income   29,553   28,689 Premiums and agents' balances   4,075   1,650 Independent dealer receivable   292   73 Other receivables   6,324   6,364     193,287   237,992 Less: Allowance for credit losses   (3,789)   (8,649)  $ 189,498 $ 229,343
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Other Assets (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Other Assets [Abstract]  
Other Assets     March 31,     2023   2022     (In thousands) Deposits (debt-related) $ 35,573 $ 37,588 Deposits (real estate related)   15,479   22,821  $ 51,052 $ 60,409
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Net Investment and Interest Income (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Table Text Block [Abstract]  
Net Investment and Interest Income       Years Ended March 31,     2023   2022   2021     (In thousands) Fixed maturities $ 171,814 $ 111,625 $ 102,021 Real estate   5,734   5,648   5,769 Insurance policy loans   869   705   829 Mortgage loans   23,854   25,850   18,248 Short-term, amounts held by ceding reinsurers, net and other investments   (17,257)   11,713   3,103 Investment income   185,014   155,541   129,970 Less: investment expenses   (8,335)   (7,280)   (7,032) Net investment and interest income$ 176,679 $ 148,261 $ 122,938
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Borrowings (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Debt Instruments [Abstract]  
Long-Term Debt                     March 31,   2023 Rates   Maturities   2023   2022                     (In thousands) Real estate loan (amortizing term) (a) 4.29 % - 6.14 % 2027   2037 $ 289,647 $ 50,259 Senior mortgages 2.70 % - 5.50 % 2024 - 2042   2,371,231   2,206,268 Real estate loans (revolving credit) – % - – %     2027   –   535,000 Fleet loans (amortizing term) 1.61 % - 5.68 % 2023 - 2029   111,856   124,651 Fleet loans (revolving credit) 2.36 % - 5.97 % 2025 - 2027   615,000   560,000 Finance leases (rental equipment) 2.18 % - 5.04 % 2023 - 2026   223,205   347,393 Finance liability (rental equipment) 1.60 % - 5.98 % 2024 - 2031   1,255,763   949,936 Private placements 2.43 % - 2.88 % 2029 - 2035   1,200,000   1,200,000 Other obligations 1.50 % - 8.00 % 2023 - 2049   76,648   86,206 Notes, loans and finance leases payable                 $ 6,143,350 $ 6,059,713 Less: Debt issuance costs                   (35,308)   (37,216) Total notes, loans and finance leases payable, net    $ 6,108,042 $ 6,022,497
Annual Maturities of Notes, Loans and Leases Payable     Years Ended March 31,     2024   2025   2026   2027   2028   Thereafter   Total     (In thousands) Notes, loans and finance leases payable, secured$ 563,153 $ 698,301 $ 667,490 $ 819,153 $ 647,409 $ 2,747,844 $ 6,143,350
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Interest on Borrowings (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Interest Expense, Borrowings [Abstract]  
Components of interest expense     Years Ended March 31,     2023   2022   2021     (In thousands) Interest expense $ 229,559 $ 167,618 $ 165,484 Capitalized interest   (11,814)   (9,700)   (11,573) Amortization of transaction costs   6,987   5,556   5,949 Interest expense resulting from cash flow hedges   (774)   3,950   3,642 Total interest expense  223,958   167,424   163,502
Interest rates and company borrowings     Revolving Credit Activity       Years Ended March 31,       2023   2022   2021       (In thousands, except interest rates)   Weighted average interest rate during the year   3.93 % 1.40 % 1.40 % Interest rate at year end   5.89 % 1.49 % 1.40 % Maximum amount outstanding during the year $ 1,105,000 $ 1,105,000 $ 1,175,000   Average amount outstanding during the year $ 824,211 $ 1,085,074 $ 1,088,293   Facility fees$ 733 $ 253 $ 261  
v3.23.1
Derivatives (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Derivative Instrument Detail [Abstract]  
Derivative Fair Values Located in Accounts Payable and Accrued Expenses in the Balance Sheet           March 31, 2023   March 31, 2022     (In thousands) Interest rate swaps designated as cash flow hedges         Assets $ 5,311 $ – Liabilities   –   587 Notional amount   206,347   235,000
Effect of Interest Rate Contracts on the Statement of Operations     Derivatives Fair Values as of     March 31, 2023   March 31, 2022               (In thousands) Equity market contracts as economic hedging instruments         Assets $ 4,295 $ 7,474 Liabilities $ – $ – Notional amount$ 465,701 $ 416,739
v3.23.1
Stockholders' Equity (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Stockholders' Equity Note [Abstract]  
Common Stock Dividends Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               August 18, 2022 $ 0.50   September 6, 2022   September 20, 2022 April 6, 2022 $ 0.50   April 18, 2022   April 29, 2022 October 6, 2021 $ 0.50   October 18, 2021   October 29, 2021 August 19, 2021 $ 0.50   September 7, 2021   September 21, 2021 June 9, 2021$ 0.50  June 24, 2021 July 8, 2021
v3.23.1
Provision for Taxes (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Table Text Block [Abstract]  
Provision For Taxes Earnings before taxes and the provision for taxes consisted of the following:     Years Ended March 31,     2023   2022   2021     (In thousands) Pretax earnings:             U.S. $ 1,178,264 $ 1,431,155 $ 773,030 Non-U.S.   39,659   44,342   23,628 Total pretax earnings $ 1,217,923 $ 1,475,497 $ 796,658               Current provision             Federal $ 115,171 $ 189,488 $ 100,521 State   42,121   55,518   16,572 Non-U.S.   5,150   6,893   3,404     162,442   251,899   120,497 Deferred provision             Federal   114,355   90,852   53,957 State   14,077   6,355   9,795 Non-U.S.   4,051   3,105   1,553     132,483   100,312   65,305               Provision for income tax expense $ 294,925 $ 352,211 $ 185,802               Income taxes paid (received) $ 145,680 $( 4,548 )$ 29,044
Schedule of Effective Income Tax Rate Reconciliation     Years Ended March 31,       2023   2022   2021       (In percentages)   Statutory federal income tax rate   21.00 % 21.00 % 21.00 % Increase (reduction) in rate resulting from:               State taxes, net of federal benefit   3.56 % 3.24 % 2.53 % Foreign rate differential   0.08 % 0.05 % – % Federal tax credits   (0.48) % (0.19) % (0.99) % Tax-exempt income   (0.08) % (0.03) % (0.08) % Dividend received deduction   (0.01) % – % (0.01) % Other   0.15 % (0.20) % 0.87 % Actual tax expense of operations  24.22 % 23.87 % 23.32 %
Components of Deferred Tax Assets and Liabilities     March 31,     2023   2022 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 33,778 $ 36,394 Accrued expenses   112,971   103,723 Policy benefit and losses, claims and loss expenses payable, net   31,436   30,572 Unrealized losses on investments   48,179   – Operating leases   12,058   15,540 Total deferred tax assets $ 238,422 $ 186,229           Deferred tax liabilities:         Property, plant and equipment $ 1,545,628 $ 1,405,604 Operating leases   12,175   15,540 Deferred policy acquisition costs   12,038   12,962 Unrealized gains on investments   –   36,299 Other   3,008   1,973 Total deferred tax liabilities   1,572,849   1,472,378 Net deferred tax liability$ 1,334,427 $ 1,286,149
Reconciliation of Total Amounts of Unrecognized Tax Benefits     Unrecognized Tax Benefits     March 31,     2023   2022     (In thousands)           Unrecognized tax benefits beginning balance $ 48,851 $ 31,069 Additions based on tax positions related to the current year   7,226   8,257 Reductions for tax positions of prior years   (443)   – Additions for tax provisions of prior years   2,473   9,525 Unrecognized tax benefits ending balance$ 58,107 $ 48,851
v3.23.1
Employee Benefit Plans (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Table Text Block [Abstract]  
Summary Of Financing Arrangements for Leveraged ESOP Debt     Years Ended March 31,     2023   2022     (In thousands) Allocated shares - Voting Common Stock   836   890 Allocated shares - Non-Voting Common Stock  7,821   –
Shares Held by the ESOP Plan The components of net periodic post retirement benefit cost were as follows:     Years Ended March 31,     2023   2022   2021     (In thousands) Service cost for benefits earned during the period $ 1,326 $ 1,401 $ 1,267 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   1,148   908   919 Other components   68   212   68 Total other components of net periodic benefit costs   1,216   1,120   987 Net periodic postretirement benefit cost$ 2,542 $ 2,521 $ 2,254
Components of Net Periodic Post Retirement Benefit Cost     Years Ended March 31,     2023   2022     (In thousands) Beginning of year $ 30,206 $ 30,755 Service cost for benefits earned during the period   1,326   1,401 Interest cost on accumulated post retirement benefit   1,148   908 Net benefit payments and expense   (1,207)   (1,021) Actuarial gain   (2,703)   (1,837) Accumulated postretirement benefit obligation   28,770   30,206           Current liabilities   1,625   1,449 Non-current liabilities   27,145   28,757           Total post retirement benefit liability recognized in statement of financial position   28,770   30,206 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (465)   (3,237) Cumulative net periodic benefit cost (in excess of employer contribution)$ 28,305 $ 26,969
Components of Post Retirement Benefit Liabilities     Years Ended March 31,     2023 2022 2021     (In percentages)   Accumulated postretirement benefit obligation  5.08 % 3.76 % 2.93 %
Discount Rate Assumptions for Accumulated Postretirement Benefit Obligations     Future Net Benefit Payments     (In thousands) Year-ended:     2024 $ 1,546 2025   1,768 2026   2,021 2027   2,270 2028   2,532 2029 Through 2033   13,291 Total$ 23,428
v3.23.1
Fair Value Measurements (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]    
Financial Instruments, Carrying and Estimated fair values     Fair Value Hierarchy As of March 31, 2023   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 189,498 $ – $ – $ 189,498 $ 189,498 Mortgage loans, net   466,531   –   –   444,957   444,957 Other investments   109,009   –   –   109,009   109,009 Total $ 765,038 $ – $ – $ 743,464 $ 743,464                                             Liabilities                     Notes, loans and finance leases payable $ 6,143,350 $ – $ 5,710,735 $ – $ 5,710,735 Total$ 6,143,350 $ – $ 5,710,735 $ – $ 5,710,735 .   Fair Value Hierarchy As of March 31, 2022   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 229,343 $ – $ – $ 229,343 $ 229,343 Mortgage loans, net   423,163   –   –   450,347   450,347 Other investments   120,592   –   –   120,592   120,592 Total $ 773,098 $ – $ – $ 800,282 $ 800,282                                             Liabilities                     Notes, loans and finance leases payable $ 5,875,781   – $ 5,875,781 $ – $ 5,875,781 Total$ 5,875,781 $ – $ 5,875,781 $ – $ 5,875,781
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis As of March 31, 2023   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 1,809,441 $ 1,808,797 $ 644 $ – Fixed maturities - available for sale   2,709,037   251,832   2,457,146   59 Preferred stock   21,982   21,982   –   – Common stock   39,375   39,375   –   – Derivatives   9,606   4,295   5,311   – Total $ 4,589,441 $ 2,126,281 $ 2,463,101 $ 59                                     Liabilities                 Derivatives $ – $ – $ – $ – Total$ – $ – $ – $ – As of March 31, 2022   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 2,482,154 $ 2,482,154 $ – $ – Fixed maturities - available for sale   2,821,092   26,914   2,794,086   92 Preferred stock   26,095   26,095   –   – Common stock   46,212   46,212   –   – Derivatives   7,474   7,474   –   – Total $ 5,383,027 $ 2,588,849 $ 2,794,086 $ 92                                     Liabilities                 Derivatives $ 587 $ – $ 587 $ – Total$ 587 $ – $ 587 $ –
v3.23.1
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Supplemental Schedule Of Reinsurance Premiums For Insurance Companies [Abstract]  
Supplemental Schedule Of Reinsurance Premiums For Insurance Companies [Table Text Block]     Amount (a)   Companies   Companies   Amount (a)   Assumed to Net       (In thousands)   Year ended December 31, 2022                       Life insurance in force $ 970,454 $ 48 $ 304,891 $ 1,275,297   24 % Premiums earned:                       Life $ 52,298 $ 1 $ 4,181 $ 56,478   7 % Accident and health   41,354   152   983   42,185   2 % Annuity   80   –   406   486   84 % Property and casualty   96,242   –   –   96,242   – % Total $ 189,974 $ 153 $ 5,570 $ 195,391                               Year ended December 31, 2021                       Life insurance in force $ 1,029,537 $ 72 $ 328,030 $ 1,357,495   24 % Premiums earned:                       Life $ 56,353 $ 2 $ 4,514 $ 60,865   7 % Accident and health   48,385   160   1,166   49,391   2 % Annuity   444   –   327   771   42 % Property and casualty   89,667   –   –   89,667   – % Total $ 194,849 $ 162 $ 6,007 $ 200,694                               Year ended December 31, 2020                       Life insurance in force $ 1,031,634 $ 73 $ 356,266 $ 1,387,827   26 % Premiums earned:                       Life $ 58,048 $ 1 $ 5,049 $ 63,096   8 % Accident and health   57,081   211   1,388   58,258   2 % Annuity   221   –   34   255   13 % Property and casualty   70,285   –   –   70,285   – % Total$ 185,635 $ 212 $ 6,471 $ 191,894    
Schedule of Effect of Reinsurance [Table Text Block]     December 31,     2022   2021     (In thousands) Unpaid losses and loss adjustment expense $ 151,874 $ 159,162 Reinsurance losses payable   1,133   1,217 Total $ 153,007 $ 160,379
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]     December 31,     2022   2021   2020     (In thousands) Balance at January 1 $ 159,162 $ 177,963 $ 209,127 Less: reinsurance recoverable   47,394   64,873   87,083 Net balance at January 1   111,768   113,090   122,044 Incurred related to:             Current year   27,570   28,980   20,670 Prior years   (5,828)   (6,290)   (3,865) Total incurred   21,742   22,690   16,805 Paid related to:             Current year   10,572   11,040   7,664 Prior years   12,393   12,972   18,095 Total paid   22,965   24,012   25,759 Net balance at December 31   110,545   111,768   113,090 Plus: reinsurance recoverable   41,329   47,394   64,873 Balance at December 31$ 151,874 $ 159,162 $ 177,963
Shortduration Insurance Contracts Claims Development [Table Text Block] Cumulative Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance                                 As of                                 December 31, 2022                                 Total of                                     Incurred-but-                                     Not-Reported                                     Liabilities Plus                                     Expected   Cumulative                                 Development   Number of Accident                               on Reported   Reported Year   2016   2017   2018   2019   2020   2021   2022   Claims   Claims     (In thousands, except claim counts)     2016   13,297   13,011   13,056   11,790   11,764   11,764   11,750   –   11,681 2017       15,748   16,109   17,078   15,538   15,273   15,264   –   12,306 2018           19,580   18,386   18,027   17,157   16,819   –   12,182 2019               22,138   26,316   27,316   27,831   1,663   12,026 2020                   20,671   17,485   17,107   3,653   11,530 2021                       28,982   25,337   5,809   14,150 2022                           27,570   11,076   12,860               Total  22,201   
Shortduration Insurance Contracts Reconciliation Of Claims Development To Liability [Table Text Block] Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance           Accident                             Year   2016   2017   2018   2019   2020   2021   2022 2016   7,777   10,665   11,643   11,746   11,764   11,764   11,750 2017       8,970   11,638   14,825   15,012   15,263   15,264 2018           8,838   12,689   15,150   16,766   16,809 2019               7,366   14,737   19,215   21,598 2020                   7,665   11,114   12,521 2021                       11,040   14,831 2022                           10,572                     Total   Total   103,345 All outstanding liabilities before 2016, net of reinsurance       72,211 Liabilities for claims and claim adjustment expenses, net of reinsurance    110,545
Shortduration Insurance Contracts Schedule Of Historical Claims Duration [Table Text Block]     December 31, 2022     (In thousands) Liabilities for unpaid Property and Casualty claims     and claim adjustment expenses, net of reinsurance $ 110,545       Total reinsurance recoverable on unpaid     Property and Casualty claims $ 41,329       Total gross liability for unpaid Property and Casualty     claims and claim adjustment expense$ 151,874
v3.23.1
Leases (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Leases [Abstract]    
Supplemental Balance Sheet Information Related to Leases     As of March 31, 2023     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 128,221 $ 128,221 Furniture and equipment   9,687   –   9,687 Rental trailers and other rental equipment   152,294   –   152,294 Rental trucks   949,838   –   949,838 Right-of-use assets, gross   1,111,819   128,221   1,240,040 Less: Accumulated depreciation   (637,054)   (69,304)   (706,358) Right-of-use assets, net$ 474,765 $ 58,917 $ 533,682       As of March 31, 2022     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 136,444 $ 136,444 Furniture and equipment   14,731   –   14,731 Rental trailers and other rental equipment   169,514   –   169,514 Rental trucks   1,114,248   –   1,114,248 Right-of-use assets, gross   1,298,493   136,444   1,434,937 Less: Accumulated depreciation   (677,669)   (62,062)   (739,731) Right-of-use assets, net$ 620,824 $ 74,382 $ 695,206
Summary of Weighted-average remaining lease terms and Discount rates     Financing leases       March 31,       2023   2022   Weighted average remaining lease term (years)   2   3   Weighted average discount rate  3.8 % 3.7 %     Operating leases       March 31,       2023   2022   Weighted average remaining lease term (years)   19.2   16.5   Weighted average discount rate  4.7 % 4.6 %
Lease costs     Twelve Months Ended March 31,     2023   2022     (In thousands)           Operating lease costs $ 32,878 $ 30,239           Finance lease cost:         Amortization of right-of-use assets $ 81,006 $ 115,199 Interest on lease liabilities   11,199   15,289 Total finance lease cost$ 92,205 $ 130,488  
Maturities of Lease Liabilities     Finance leases   Operating leases Year ending March 31,   (In thousands)           2024 $ 110,812 $ 24,338 2025   77,621   11,540 2026   46,763   4,957 2027   –   3,555 2028   –   2,951 Thereafter   –   56,615 Total lease payments   235,196   103,956 Less: imputed interest   (11,991)   (45,583) Present value of lease liabilities$ 223,205 $ 58,373  
v3.23.1
Related Party Transactions (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Related Party Revenue [Abstract]  
Related Party Revenue     Years Ended March 31,     2023   2022   2021     (In thousands) U-Haul management fee revenue from Blackwater $ 29,825 $ 28,546 $ 25,512 U-Haul management fee revenue from Mercury   7,248   6,648   6,091  $ 37,073 $ 35,194 $ 31,603
Related Party Cost and Expense     Years Ended March 31,     2023   2022   2021     (In thousands) U-Haul lease expenses to Blackwater $ 2,416 $ 2,445 $ 2,612 U-Haul commission expenses to Blackwater   88,067   88,288   69,212  $ 90,483 $ 90,733 $ 71,824
Due from Related Party, Recap of Assets     March 31,     2023   2022     (In thousands) U-Haul receivable from Blackwater $ 42,141 $ 41,364 U-Haul receivable from Mercury   8,402   5,708 Other (a)   (2,235)   779  $ 48,308 $ 47,851
v3.23.1
Statutory Financial Information of Insurance Subsidiaries (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Insurance [Abstract]  
Statutory Financial Information of Insurance Subsidiaries     Years Ended December 31,     2022   2021   2020     (In thousands) Repwest:             Audited statutory net income $ 34,963 $ 33,314 $ 22,898 Audited statutory capital and surplus   294,515   266,875   227,380 ARCOA:             Audited statutory net income (loss)   2,319   (752)   2,438 Audited statutory capital and surplus   13,340   14,697   15,928 Oxford:             Audited statutory net income (loss)   (771)   23,217   6,296 Audited statutory capital and surplus   227,667   230,202   218,301 CFLIC:             Audited statutory net income   3,637   6,019   8,082 Audited statutory capital and surplus   20,591   17,098   25,980 NAI:             Audited statutory net income   1,017   1,874   2,127 Audited statutory capital and surplus  8,906   7,961   13,980
v3.23.1
Financial Information by Geographic Area (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Geographic Areas, Long-Lived Assets [Abstract]      
Industry Segment and Geographic Area Data     United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2023             Total revenues $ 5,570,264 $ 294,427 $ 5,864,691 Depreciation and amortization, net of gains on disposal   514,043   6,272   520,315 Interest expense   221,008   2,950   223,958 Pretax earnings   1,178,264   39,659   1,217,923 Income tax expense   285,724   9,201   294,925 Identifiable assets  17,453,015   671,633   18,124,648     United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2022             Total revenues $ 5,452,027 $ 287,720 $ 5,739,747 Depreciation and amortization, net of gains on disposal   509,517   2,969   512,486 Interest expense   163,586   3,838   167,424 Pretax earnings   1,431,155   44,342   1,475,497 Income tax expense   342,213   9,998   352,211 Identifiable assets  16,776,070   523,511   17,299,581     United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2021             Total revenues $ 4,334,083 $ 207,902 $ 4,541,985 Depreciation and amortization, net of gains on disposal   631,344   10,160   641,504 Interest expense   160,429   3,073   163,502 Pretax earnings   773,030   23,628   796,658 Income tax expense   180,845   4,957   185,802 Identifiable assets  14,212,978   438,628   14,651,606
v3.23.1
Revenue Recognition (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Revenue From Contract With Customer [Abstract]  
Lease schedule over next five years and thereafter     Year Ended March 31,     2024   2025   2026   2027   2028   Thereafter           (In thousands)                           Self-moving equipment rentals $ 5,750 $ – $ – $ – $ – $ – Property lease revenues   19,223   12,378   9,552   7,680   5,050   38,998 Total$ 24,973 $ 12,378 $ 9,552 $ 7,680 $ 5,050 $ 38,998
Disaggregation of revenue     Years Ended March 31,     2023   2022   2021           (In thousands)               Revenues recognized over time $   320,822 $   284,401 $   182,278 Revenues recognized at a point in time   425,584   414,985   396,600 Total revenues recognized under ASC 606   746,406   699,386   578,878               Revenues recognized under ASC 842   4,744,746   4,690,434   3,644,798 Revenues recognized under ASC 944   196,860   201,666   195,371 Revenues recognized under ASC 320   176,679   148,261   122,938 Total revenues$  5,864,691 $  5,739,747 $  4,541,985
v3.23.1
Allowance for Credit Losses (Table Text Block)
 12 Months Ended
Mar. 31, 2023
Allowance For Credit Loss [Abstract]  
Accounts Receivable Allowance For Credit Loss [Table Text Block]     Allowance for Credit Losses     Trade Receivables   Investments, Fixed Maturities   Investments, other   Total                       (In thousands)     Balance as of March 31, 2021 $ 4,421 $ 1,320 $ 501 $ 6,242 Provision for (reversal of) credit losses   4,228   (1,260)   –   2,968 Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of March 31, 2022 $ 8,649 $ 60 $ 501 $ 9,210 Provision for (reversal of) credit losses   (4,860)   2,041   16   (2,803) Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of March 31, 2023$ 3,789 $ 2,101 $ 517 $ 6,407
v3.23.1
Principles of Consolidation (Narratives) (Details)
 12 Months Ended
Mar. 31, 2023
Disclosure of Entity's Reportable Segments [Abstract]  
Number of reportable segments 3
v3.23.1
Accounting Policies (Narratives) (Details) - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Jan. 01, 2021
Cash, Insured and Uninsured [Abstract]        
Cash, FDIC Insured Amount $ 250,000      
Cash, CDIC insured amount $ 100,000      
LIFO Method Related Items [Abstract]        
Percentage of LIFO inventory 94.00% 93.00%    
Inventory, LIFO reserve $ 47,065,000 $ 37,400,000    
Effect of LIFO inventory liquidation on income 1,600,000 100,000 $ 400,000  
Disposition of Property, Plant and Equipment        
Net amount of (gains) losses netted against depreciation expense $ 247,100,000 214,200,000 54,100,000  
Schedule of rental trucks depreciation:        
Percentage reduction for year one, depreciation 16.00%      
Percentage reduction for year two, depreciation 13.00%      
Percentage reduction for year three, depreciation 11.00%      
Percentage reduction for year four, depreciation 9.00%      
Percentage reduction for year five, depreciation 8.00%      
Percentage reduction for year six, depreciation 7.00%      
Percentage reduction for year seven, depreciation 6.00%      
Salvage value percentage under the old declining balance method 15.00%      
Salvage value percentage 5.70%      
Real Estate Companies Disclosures [Abstract]        
Carrying value of surplus real estate $ 72,200,000 67,800,000    
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]        
Accrued insurance, noncurrent 21,600,000 19,700,000    
Marketing and Advertising Expense [Abstract]        
Advertising expense 11,100,000 13,700,000 18,000,000.0  
Policyholder Benefits and Claims Incurred [Abstract]        
Deferred sales inducements, net 16,600,000 15,700,000    
Deferred sales inducements, amortization expense 3,700,000 4,700,000 4,300,000  
Adoption of New Accounting Pronounements        
Other components of net periodic benefit cost 1,216,000 1,120,000 $ 987,000  
Operating lease commitment, asset 474,765,000 620,824,000    
Operating lease commitment, liability 58,373,000      
Prior Period Adjustment [Abstract]        
Equity impact, net 6,528,335,000 5,952,492,000    
All Nonrental Equipment [Member]        
LIFO Method Related Items [Abstract]        
Inventory, LIFO reserve $ 47,100,000 $ 37,400,000    
Accumulated Other Comprehensive Income (Loss) [Member] | Minimum [Member] | Revision Of Prior Period Accounting Standards Update Adjustment [Member]        
Prior Period Adjustment [Abstract]        
Equity impact, net       $ 110,000,000.0
Accumulated Other Comprehensive Income (Loss) [Member] | Maximum [Member] | Revision Of Prior Period Accounting Standards Update Adjustment [Member]        
Prior Period Adjustment [Abstract]        
Equity impact, net       $ 130,000,000.0
v3.23.1
Accounting Policies (Inventories, net) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Inventory, Net [Abstract]    
Truck and trailer parts and accessories (a) $ 150,319 $ 148,237
Hitches and towing components (b) 30,927 32,508
Moving supplies and propane (b) 18,222 16,623
Subtotal 199,468 197,368
Less: LIFO reserves (47,065) (37,400)
Less: excess and obsolete reserves (929) (1,080)
Total $ 151,474 $ 158,888
v3.23.1
Earnings Per Share Calculation Basic Diluted Earnings Per Share Voting Non Voting Common Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Earnings Per Share Diluted Other Disclosures [Abstract]      
Net earnings available to common shareholders $ 922,998 $ 1,123,286 $ 610,856
Voting Common Stock dividends declared (19,608) (29,412) (49,019)
Non-Voting Common Stock dividends declared $ (14,117) $ 0 $ 0
Common Stock [Member]      
Earnings Per Share Diluted Other Disclosures [Abstract]      
Weighted Average Number Of Shares Outstanding Basic 19,607,788 19,607,788 19,607,788
Percent Weighted Average Shares Outstanding Common Stock 10.00% 10.00% 10.00%
Net earnings available to common shareholders $ 0 $ 0 $ 0
Undistributed earnings available to common stockholders 889,273 1,093,874 561,837
Undistributed earnings available to common stockholders, participating securities $ 88,927 $ 109,387 $ 56,184
Undistributed earnings per share, common stock $ 4.54 $ 5.58 $ 2.87
Dividends declared per share, distributed 1.00 1.50 2.50
Basic and diluted earnings per share Common Stock $ 5.54 $ 7.08 $ 5.37
Nonvoting Common Stock [Member]      
Earnings Per Share Diluted Other Disclosures [Abstract]      
Weighted Average Number Of Shares Outstanding Basic 176,470,092 176,470,092 176,470,092
Percent Weighted Average Shares Outstanding Common Stock 90.00% 90.00% 90.00%
Net earnings available to common shareholders $ 0 $ 0 $ 0
Undistributed earnings available to common stockholders, participating securities $ 800,346 $ 984,487 $ 505,653
Undistributed earnings per share, common stock $ 4.54 $ 5.58 $ 2.87
Dividends declared per share, distributed 0.08 0 0
Basic and diluted earnings per share Common Stock $ 4.62 $ 5.58 $ 2.87
Nonvoting Common Stock [Member] | Common Stock [Member]      
Earnings Per Share Diluted Other Disclosures [Abstract]      
Weighted Average Number Of Shares Outstanding Basic 196,077,880 196,077,880 196,077,880
v3.23.1
Reinsurance Recoverables and Trade Receivables, Net (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Reinsurance Recoverables and Trade Receivables, Net [Abstract]      
Reinsurance recoverable $ 42,362 $ 41,329 $ 50,586
Trade accounts receivable 110,281   150,285
Paid losses recoverable 400   345
Accrued investment income 29,553   28,689
Premiums and agents' balances 4,075   1,650
Independent dealer receivables 292   73
Other receivables 6,324   6,364
Reinsurance recoverables and trade receivables, gross 193,287   237,992
Less: Allowance for doubtful accounts (3,789)   (8,649)
Reinsurance recoverables and trade receivables, net $ 189,498   $ 229,343
v3.23.1
Investments (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]      
Assets held by insurance regulators $ 23.4 $ 27.1  
Fair value of sold available-for-sale securities 196.2 352.3 $ 523.9
Available for sale securities, realized gain 0.9 9.5 9.6
Available for sale securities, realized loss 0.3 $ 1.4 $ 2.1
Other-than-temporary impairments 2.0    
Available for sale investments, unrealized loss position      
Available for sale investments, fair value, recovery amount $ 0.5    
Mortgages [Member] | Minimum [Member]      
Real Estate [Abstract]      
Mortgage loan interest rate 3.50%    
Mortgages [Member] | Maximum [Member]      
Real Estate [Abstract]      
Mortgage loan interest rate 6.50%    
v3.23.1
Investments (Available-for-sale investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Available-for-sale securities, investments:    
Amortized cost, equity investments $ 3,006,587 $ 2,664,037
Gross unrealized gains 5,319 170,294
Gross unrealized losses more than 12 months (118,943) (445)
Gross unrealized losses less than 12 months (181,825) (12,734)
Allowance for Expected Credit Losses (2,101) (60)
Fair Value 2,709,037 2,821,092
U.S. treasury securities and government obligations [Member]    
Available-for-sale securities, investments:    
Amortized cost, equity investments 353,189 128,078
Gross unrealized gains 3,061 7,984
Gross unrealized losses more than 12 months (7,639) 0
Gross unrealized losses less than 12 months (3,935) (969)
Allowance for Expected Credit Losses 0 0
Fair Value 344,676 135,093
U.S. government agency mortgage-backed securities [Member]    
Available-for-sale securities, investments:    
Amortized cost, equity investments 34,126 44,678
Gross unrealized gains 40 280
Gross unrealized losses more than 12 months (6,707) (42)
Gross unrealized losses less than 12 months (228) (3,111)
Allowance for Expected Credit Losses 0 0
Fair Value 27,231 41,805
Obligations of states and political subdivisions [Member]    
Available-for-sale securities, investments:    
Amortized cost, equity investments 161,960 178,040
Gross unrealized gains 649 15,450
Gross unrealized losses more than 12 months (4,014) 0
Gross unrealized losses less than 12 months (8,090) (508)
Allowance for Expected Credit Losses 0 0
Fair Value 150,505 192,982
Corporate securities [Member]    
Available-for-sale securities, investments:    
Amortized cost, equity investments 2,086,432 1,989,212
Gross unrealized gains 1,491 138,909
Gross unrealized losses more than 12 months (60,224) (402)
Gross unrealized losses less than 12 months (156,365) (6,604)
Allowance for Expected Credit Losses (2,101) (60)
Fair Value 1,869,233 2,121,055
Mortgage-backed securities [Member]    
Available-for-sale securities, investments:    
Amortized cost, equity investments 370,880 324,029
Gross unrealized gains 78 7,671
Gross unrealized losses more than 12 months (40,359) (1)
Gross unrealized losses less than 12 months (13,207) (1,542)
Allowance for Expected Credit Losses 0 0
Fair Value $ 317,392 $ 330,157
v3.23.1
Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Available-for-sale securities, amortized cost:    
Amortized cost $ 3,006,587 $ 2,664,037
Available-for-sale securities, fair value:    
Fair Value 2,709,037 2,821,092
Us Government Corporate Securities [Member]    
Available-for-sale securities, amortized cost:    
Due in one year or less 354,875 97,969
Due after one year through five years 754,175 541,840
Due after five years through ten years 736,089 704,295
Due after ten years 790,568 995,904
Amortized cost 2,635,707 2,340,008
Available-for-sale securities, fair value:    
Due in one year or less 354,184 99,432
Due after one year through five years 717,552 570,135
Due after five years through ten years 665,708 765,073
Due after ten years 654,201 1,056,295
Fair Value 2,391,645 2,490,935
Mortgage backed securities [Member]    
Available-for-sale securities, amortized cost:    
Amortized cost 370,880 324,029
Available-for-sale securities, fair value:    
Fair Value $ 317,392 $ 330,157
v3.23.1
Investments (Available for sale equity investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Marketable Securities [Abstract]    
Amortized coxt, equity investments $ 55,631 $ 53,728
Estimated market value, equity investments 61,357 72,307
Common stocks [Member]    
Marketable Securities [Abstract]    
Amortized coxt, equity investments 29,577 27,674
Estimated market value, equity investments 39,375 46,212
Non-redeemable preferred stocks [Member]    
Marketable Securities [Abstract]    
Amortized coxt, equity investments 26,054 26,054
Estimated market value, equity investments $ 21,982 $ 26,095
v3.23.1
Investments (Carrying value of other investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Business Combination Separately Recognized Transactions Additional Disclosures [Abstract]    
Mortgage loans, net $ 466,531 $ 423,163
Short-term investments 15,921 30,916
Real estate 72,178 67,824
Policy loans 10,921 10,309
Other equity investments 9,989 11,543
Total investments $ 575,540 $ 543,755
v3.23.1
Other Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Other Assets [Abstract]    
Deposits (debt-related) $ 35,573 $ 37,588
Deposits (real estate related) 15,479 22,821
Other assets, total $ 51,052 $ 60,409
v3.23.1
Net Investment and Interest Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Net Investment Income [Line Items]      
Investment income $ 185,014 $ 155,541 $ 129,970
Less: investment expenses (8,335) (7,280) (7,032)
Net investment and interest income 176,679 148,261 122,938
Fixed Maturities [Member]      
Net Investment Income [Line Items]      
Investment income 171,814 111,625 102,021
Real Estate [Member]      
Net Investment Income [Line Items]      
Investment income 5,734 5,648 5,769
Insurance policy loans [Member]      
Net Investment Income [Line Items]      
Investment income 869 705 829
Mortgage loans [Member]      
Net Investment Income [Line Items]      
Investment income 23,854 25,850 18,248
Short-term, amounts held by ceding reinsurers, net and other investments [Member]      
Net Investment Income [Line Items]      
Investment income $ (17,257) $ 11,713 $ 3,103
v3.23.1
Borrowings (Narratives) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Debt instruments, face, payment, and remaining balance amount:        
Notes, loans and leases payable $ 6,108,042 $ 6,022,497    
Debt instruments, issuance and maturity dates:        
Remaining Lease Term Finance Lease Weighted Average 2 3    
Minimum [Member]        
Debt instruments, interest rate, effective percentage:        
Unused capacity fee 4.00%      
Maximum [Member]        
Debt instruments, interest rate, effective percentage:        
Unused capacity fee 10.00%      
Working capital loans two [Member] | U-Haul Holding Company [Member] | SOFR        
Debt instruments, interest rate, effective percentage:        
Unused capacity fee 0.30%      
Debt instruments, face, payment, and remaining balance amount:        
Debt instrument, original face amount $ 465,000      
Line of credit facility, maximum borrowing capacity 465,000      
New capital lease obligations, amount $ 150,000      
Rental Truck (amortizing loans) First Loan [Member] | U-Haul Holding Company [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 1.61%      
Rental Truck (amortizing loans) First Loan [Member] | U-Haul Holding Company [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 5.68%      
Finance Lease [Member] | U-Haul Holding Company [Member]        
Lease Cost [Abstract]        
Sale Leaseback Transaction Lease Terms (7) year terms      
Finance Lease [Member] | U-Haul Holding Company [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 2.18%      
Finance Lease [Member] | U-Haul Holding Company [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 5.04%      
Capital Lease Obligations [Member] | U-Haul Holding Company [Member]        
Lease Cost [Abstract]        
Sale Leaseback Transaction Lease Terms (7) years      
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 1.60%      
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 5.98%      
Private placements [Member] | U-Haul Holding Company [Member]        
Debt instruments, face, payment, and remaining balance amount:        
Line of credit facility, remaining borrowing capacity $ 150,000 $ 100,000    
New capital lease obligations, amount $ 600,000 600,000    
Subsidiary holdings of parent company debt   $ 150,000    
Private placements [Member] | U-Haul Holding Company [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 2.43% 2.55%    
Debt instruments, issuance and maturity dates:        
Debt instrument, maturity year 2029 2030    
Private placements [Member] | U-Haul Holding Company [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 2.78% 2.88%    
Debt instruments, issuance and maturity dates:        
Debt instrument, maturity year 2033 2035    
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 0.10%      
Debt instruments, interest rate, effective percentage:        
Sum of LIBOR and margin, maximum rate 4.29%      
Debt instruments, face, payment, and remaining balance amount:        
Line of credit facility, maximum borrowing capacity $ 206,300      
Amount held at fixed interest rate $ 83,300      
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR | Minimum [Member]        
Debt instruments, interest rate, effective percentage:        
LIBOR 4.62%      
Applicable margin interest rate 0.65%      
Applicable margin, per loan agreement, minimum rate 5.58%      
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR | Maximum [Member]        
Debt instruments, interest rate, effective percentage:        
LIBOR 4.83%      
Applicable margin interest rate 1.38%      
Applicable margin, per loan agreement, maximum rate 6.14%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member]        
Debt instruments, interest rate, effective percentage:        
Debt Weighted Average Interest Rate 4.09%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 2.70%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 5.50%      
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Minimum [Member]        
Debt instruments, interest rate, effective percentage:        
LIBOR 4.52%      
Sum of LIBOR and margin, minimum rate 1.15%      
Applicable margin, per loan agreement, minimum rate 5.77%      
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Maximum [Member]        
Debt instruments, interest rate, effective percentage:        
LIBOR 4.67%      
Sum of LIBOR and margin, maximum rate 1.25%      
Applicable margin, per loan agreement, maximum rate 5.97%      
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | SOFR        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 2.36%      
Debt instruments, face, payment, and remaining balance amount:        
Aggregate borrowing capacity, amount $ 615,000      
Line of credit facility, maximum borrowing capacity 615,000      
Notes, loans and leases payable 615,000      
Amount held at fixed interest rate $ 100,000      
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | U-Haul Holding Company [Member]        
Debt instruments, interest rate, effective percentage:        
Debt instrument at period end, LIBOR plus margin 0.10%      
Uhaul S Fleet Two Thousand Ten Box Truck Note [Member] | Other Obligations [Member] | Minimum [Member]        
Debt instruments, issuance and maturity dates:        
Debt instrument, maturity year 2023      
Uhaul S Fleet Two Thousand Ten Box Truck Note [Member] | Other Obligations [Member] | Maximum [Member]        
Debt instruments, issuance and maturity dates:        
Debt instrument, maturity year 2049      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member]        
Debt instruments, face, payment, and remaining balance amount:        
Notes, loans and leases payable $ 78,400      
Subsidiary holdings of parent company debt $ 1,700      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Minimum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 1.50%      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Maximum [Member]        
Debt instruments, interest rate, stated percentage:        
Debt instrument, interest rate, stated percentage 8.00%      
Life Insurance [Member] | FHLB [Member]        
Federal Home Loan Bank, Advances, Activity for the year [Abstract]        
Deposit amount     $ 60,000  
Available for sale equity securities, noncurrent     78,900  
Available for sale equity securities pledged as collateral     $ 88,400 $ 62,800
Life Insurance [Member] | FHLB [Member] | Minimum [Member]        
Federal Home Loan Bank, Advances, Activity for the year [Abstract]        
Deposit interest rate     0.49%  
Life Insurance [Member] | FHLB [Member] | Maximum [Member]        
Federal Home Loan Bank, Advances, Activity for the year [Abstract]        
Deposit interest rate     4.21%  
v3.23.1
Borrowings (Long-term debt borrowings) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Debt instrument, maturities:    
Notes, loans and leases payable, gross $ 5,710,735 $ 5,875,781
Notes, loans and finance/capital leases payable 6,143,350 6,059,713
Less: Debt issuance costs (35,308) (37,216)
Notes, loans and finance/capital leases payable, net $ 6,108,042 6,022,497
Real estate loan (amortizing term) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2027  
Debt instrument, maturity year range, end 2037  
Notes, loans and finance/capital leases payable $ 289,647 50,259
Real estate loan (amortizing term) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 4.29%  
Real estate loan (amortizing term) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 6.14%  
Senior mortgages [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2024  
Debt instrument, maturity year range, end 2042  
Notes, loans and finance/capital leases payable $ 2,371,231 2,206,268
Senior mortgages [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.70%  
Senior mortgages [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.50%  
Real estate loans (revolving credit) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, end 2027  
Notes, loans and finance/capital leases payable $ 0 535,000
Real estate loans (revolving credit) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 0.00%  
Real estate loans (revolving credit) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 0.00%  
Fleet loans (amortizing) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2023  
Debt instrument, maturity year range, end 2029  
Notes, loans and finance/capital leases payable $ 111,856 124,651
Fleet loans (amortizing) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.61%  
Fleet loans (amortizing) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.68%  
Fleet loans (securitization) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2025  
Debt instrument, maturity year range, end 2027  
Notes, loans and finance/capital leases payable $ 615,000 560,000
Fleet loans (securitization) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.36%  
Fleet loans (securitization) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.97%  
Fleet Loans (revolving credit) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2023  
Debt instrument, maturity year range, end 2026  
Notes, loans and finance/capital leases payable $ 223,205 347,393
Fleet Loans (revolving credit) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.18%  
Fleet Loans (revolving credit) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.04%  
Capital leases (rental equipment) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2024  
Debt instrument, maturity year range, end 2031  
Notes, loans and finance/capital leases payable $ 1,255,763 949,936
Capital leases (rental equipment) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.60%  
Capital leases (rental equipment) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.98%  
Private placements [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2029  
Debt instrument, maturity year range, end 2035  
Notes, loans and finance/capital leases payable $ 1,200,000 1,200,000
Private placements [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.43%  
Private placements [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.88%  
Other Obligations [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2023  
Debt instrument, maturity year range, end 2049  
Notes, loans and finance/capital leases payable $ 76,648 $ 86,206
Other Obligations [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.50%  
Other Obligations [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 8.00%  
v3.23.1
Borrowings (Annual maturities of Notes, Loans and Leases Payable) (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Long-term debt, by Maturity:  
2024 $ 563,153
2025 698,301
2026 667,490
2027 819,153
2028 647,409
Thereafter 2,747,844
Total $ 6,143,350
v3.23.1
Interest on Borrowings (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]      
Interest paid in cash including payments related to derivative contracts $ 225.8 $ 166.1 $ 166.4
v3.23.1
Interest on Borrowings (Components of interest expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Interest expense, borrowings:      
Interest expense $ 229,559 $ 167,618 $ 165,484
Capitalized interest (11,814) (9,700) (11,573)
Amortization of transaction costs 6,987 5,556 5,949
Interest expense resulting rom derivatives (774) 3,950 3,642
Total interest expense $ 223,958 $ 167,424 $ 163,502
v3.23.1
Interest on Borrowings (Interest Rates and Company Borrowings) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Interest and debt expense:      
Weighted average interest rate during the year 3.93% 1.40% 1.40%
Interest rate at year end 5.89% 1.49% 1.40%
Maximum amount outstanding during the year $ 1,105,000 $ 1,105,000 $ 1,175,000
Average amount outstanding during the year 824,211 1,085,074 1,088,293
Facility fees $ 733 $ 253 $ 261
v3.23.1
Derivatives (Narratives) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
AOCI Attributable To Parent [Abstract]          
Interest expense $ 223,958 $ 167,424 $ 163,502    
Derivative Fair Value Of Derivative Net [Abstract]          
Derivative hedges, net market value 5,311 0   $ 4,300 $ 7,500
Derivative hedges, notional amount       $ 465,700 $ 416,700
Amounts reclassified from AOCI to interest expense 772 (3,948) (3,640)    
Interest rate contracts          
AOCI Attributable To Parent [Abstract]          
Interest expense 3,700        
Investments, other          
Derivative Fair Value Of Derivative Net [Abstract]          
Amounts reclassified from AOCI to interest expense $ 8,900 $ 3,700 $ 2,600    
v3.23.1
Derivatives (Interest rate contracts designated as hedging instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Interest Rate Fair Value Hedges [Abstract]        
Assets $ 5,311 $ 4,300 $ 0 $ 7,500
Liabilities 0   (587)  
Notional amount (debt) $ 206,347   $ 235,000  
Notional amount (lease)   $ 465,700   $ 416,700
v3.23.1
Derivatives (Effect of interest rate contracts on statement of operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Effect of Interest rate Contracts [Abstract]      
(Gain) recognized in AOCI on interest rate contracts (effective portion) $ 5,900 $ 4,553 $ 3,071
Gain reclassified from AOCI into income $ 772 $ (3,948) $ (3,640)
v3.23.1
Derivatives (Equity Market Contracts Designated As Hedging Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Notional Amount Of Derivatives [Abstract]        
Derivative Asset Notional Amount   $ 465,700   $ 416,700
Derivative Liability, Notional Amount $ 206,347   $ 235,000  
Equity Swap [Member]        
Notional Amount Of Derivatives [Abstract]        
Derivative Asset Notional Amount 4,295   7,474  
Derivative Liability, Notional Amount 0   0  
Derivative Notional Amount $ 465,701   $ 416,739  
v3.23.1
Accumulated Other Comprehensive Income Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 $ 46,384    
Foreign currency translation (782) $ (2,828) $ (5,694)
Unrealized net loss on investments (319,190) (62,626) 76,969
Amounts reclassified into earnings on hedging activities (582) 2,978 2,746
Change in post retirement benefit obligations 2,091 1,546 (1,387)
Other comprehensive income (loss) (313,430) (60,473) 72,205
Ending balance as of March 31 (267,046) 46,384  
Foreign Currency Translation      
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 (55,757) (52,929) (47,235)
Foreign currency translation (782) (2,828) (5,694)
Unrealized net loss on investments 0 0 0
Change in fair value of cash flow hedges 0 0 0
Amounts reclassified into earnings on hedging activities 0 0 0
Change in post retirement benefit obligations 0 0 0
Other comprehensive income (loss) (782) (2,828) (5,694)
Ending balance as of March 31 (56,539) (55,757) (52,929)
Unrealized Gain (Loss) on Investments      
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 105,027 167,653 90,684
Foreign currency translation 0 0 0
Unrealized net loss on investments (319,190) (62,626) 76,969
Change in fair value of cash flow hedges 0 0 0
Amounts reclassified into earnings on hedging activities 0 0 0
Change in post retirement benefit obligations 0 0 0
Other comprehensive income (loss) (319,190) (62,626) 76,969
Ending balance as of March 31 (214,163) 105,027 167,653
Fair Market Value of Cash Flow Hedges      
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 (444) (3,879) (6,196)
Foreign currency translation 0 0 0
Unrealized net loss on investments 0 0 0
Change in fair value of cash flow hedges 5,033 457 (429)
Amounts reclassified into earnings on hedging activities (582) 2,978 2,746
Change in post retirement benefit obligations 0 0 0
Other comprehensive income (loss) 4,451 3,435 2,317
Ending balance as of March 31 4,007 (444) (3,879)
Postretirement Benefit Obligation Gain (Loss)      
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 (2,442) (3,988) (2,601)
Foreign currency translation 0 0 0
Unrealized net loss on investments 0 0 0
Change in fair value of cash flow hedges 0 0 0
Amounts reclassified into earnings on hedging activities 0 0 0
Change in post retirement benefit obligations 2,091 1,546 (1,387)
Other comprehensive income (loss) 2,091 1,546 (1,387)
Ending balance as of March 31 (351) (2,442) (3,988)
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]      
Beginning balance as of March 31 46,384 106,857 34,652
Foreign currency translation (782) (2,828) (5,694)
Unrealized net loss on investments (319,190) (62,626) 76,969
Change in fair value of cash flow hedges 5,033 457 (429)
Amounts reclassified into earnings on hedging activities (582) 2,978 2,746
Change in post retirement benefit obligations 2,091 1,546 (1,387)
Other comprehensive income (loss) (313,430) (60,473) 72,205
Ending balance as of March 31 $ (267,046) $ 46,384 $ 106,857
v3.23.1
Stockholders' Equity (Narratives) (Details)
 12 Months Ended
Mar. 31, 2023
$ / shares
Dividends declared one [Member] | Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Aug. 18, 2022
Dividend paid, amount per share $ 0.50
Dividends payable, date of record Sep. 06, 2022
Dividends payable, date to be paid Sep. 20, 2022
Dividends declared one [Member] | Nonvoting Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Mar. 03, 2023
Dividend paid, amount per share $ 0.04
Dividends payable, date of record Mar. 14, 2023
Dividends payable, date to be paid Mar. 27, 2023
Dividends declared two [Member] | Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Apr. 06, 2022
Dividend paid, amount per share $ 0.50
Dividends payable, date of record Apr. 18, 2022
Dividends payable, date to be paid Apr. 29, 2022
Dividends declared two [Member] | Nonvoting Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Dec. 07, 2022
Dividend paid, amount per share $ 0.04
Dividends payable, date of record Dec. 19, 2022
Dividends payable, date to be paid Dec. 30, 2022
Dividends declared three [Member] | Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Oct. 06, 2021
Dividend paid, amount per share $ 0.50
Dividends payable, date of record Oct. 18, 2021
Dividends payable, date to be paid Oct. 29, 2021
Dividends declared four [Member] | Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Aug. 19, 2021
Dividend paid, amount per share $ 0.50
Dividends payable, date of record Sep. 07, 2021
Dividends payable, date to be paid Sep. 21, 2021
Dividends declared five [Member] | Common Stock [Member]  
Dividends Declared  
Dividends payable, date declared Jun. 09, 2021
Dividend paid, amount per share $ 0.50
Dividends payable, date of record Jun. 24, 2021
Dividends payable, date to be paid Jul. 08, 2021
v3.23.1
Provision for Taxes (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Components of Deferred Tax Assets and Liabilities [Abstract]      
Tax adjustment settlements and unusual provisions $ 366.0 $ 243.0 $ 146.0
NOL to expire, credit 480.0   $ 458.5
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]      
Unrecognized tax benefits, income tax penalties and interest accrued 17.7 $ 15.7  
Unrecognized tax benefits, income tax penalties and interest expense $ 2.0    
v3.23.1
Provision for Taxes (Earnings before taxes and provision for taxes) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Pretax earnings:      
U.S. $ 1,178,264 $ 1,431,155 $ 773,030
Non-U.S. 39,659 44,342 23,628
Total pretax earnings 1,217,923 1,475,497 796,658
Current provision (benefit)      
Federal 115,171 189,488 100,521
State 42,121 55,518 16,572
Non-U.S. 5,150 6,893 3,404
Current provision (benefit), total 162,442 251,899 120,497
Deferred provision (benefit)      
Federal 114,355 90,852 53,957
State 14,077 6,355 9,795
Non-U.S. 4,051 3,105 1,553
Deferred provision (benefit), total 132,483 100,312 65,305
Provision for income tax expense 294,925 352,211 185,802
Income taxes paid (net of income tax refunds) $ 145,680 $ (4,548) $ 29,044
v3.23.1
Provision for Taxes (Effective income tax rate reconciliation) (Details)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory federal income tax rate 21.00% 21.00% 21.00%
Increase (Reduction) in Rate Resulting from [Abstract]      
State taxes, net of federal benefit 3.56% 3.24% 2.53%
Foreign rate differential 0.08% 0.05% 0.00%
Federal tax credits 0.48% 0.19% 0.99%
Tax-exempt income 0.08% 0.03% 0.08%
Dividend received deduction 0.01% 0.00% 0.01%
Other 0.15% (0.20%) 0.87%
Actual tax expense of operations 24.22% 23.87% 23.32%
v3.23.1
Provision for Taxes (Significant components of deferred tax assets and liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Deferred tax assets:    
Net operating loss and credit carry forwards $ 33,778 $ 36,394
Accrued expenses 112,971 103,723
Policy benefits and losses, claims and loss expenses payable, net 31,436 30,572
Unrealized losses 48,179 0
Operating leases, assets 12,058 15,540
Total deferred tax assets 238,422 186,229
Deferred tax liabilities:    
Property, plant and equipment 1,545,628 1,405,604
Operating leases, liabilities 12,175 15,540
Deferred policy acquisition costs 12,038 12,962
Unrealized gains 0 36,299
Other 3,008 1,973
Total deferred tax liabilities 1,572,849 1,472,378
Net deferred tax liability $ 1,334,427 $ 1,286,149
v3.23.1
Provision for Taxes (Reconciliation of total amounts of unrecognized tax benefits roll forward) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Unrecognized tax benefits beginning balance $ 48,851 $ 31,069
Additions based on tax positions related to the current year 7,226 8,257
Reductions for tax positions of prior years (443) 0
Additions for tax provisions of prior years 2,473 9,525
Unrecognized tax benefits ending balance $ 58,107 $ 48,851
v3.23.1
Employee Benefit Plans (Narratives) (Details) - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Compensation of related costs, Share-based Payments [Abstract]      
Employee stock ownership plan (ESOP), compensation expense $ 22,100,000 $ 23,000,000.0 $ 23,000,000.0
Cash contributions to ESOP non leveraged $ 22,100,000 $ 23,000,000.0 $ 23,000,000.0
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]      
Defined benefit plan, health care cost trend rate assumed for next fiscal year 6.00%    
Defined benefit plan, ultimate health care cost trend rate 4.00%    
Post retirement health insurance [Member]      
Deferred Compensation Arrangements [Abstract]      
Lifetime maximum benefit paid per individual $ 20,000    
Post retirement life insurance [Member]      
Deferred Compensation Arrangements [Abstract]      
Lifetime maximum benefit paid per individual 3,000    
Additional benefit requirement amount $ 100    
v3.23.1
Employee Benefit Plans (Shares Held by the ESOP Plan) (Details) - shares
Mar. 31, 2023
Mar. 31, 2022
Common Stock [Member]    
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]    
Allocated shares 836 890
Nonvoting Common Stock [Member]    
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]    
Allocated shares 7,821 0
v3.23.1
Employee Benefit Plans (Components of net periodic post retirement benefit cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Postemployment Benefits [Abstract]      
Service cost for benefits earned during the period $ 1,326 $ 1,401 $ 1,267
Interest cost on accumulated postretirement benefit 1,148 908 919
Other components 68 212 68
Total other components of net periodic benefit costs 1,216 1,120 987
Net periodic postretirement benefit cost $ 2,542 $ 2,521 $ 2,254
v3.23.1
Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning of year $ 30,206 $ 30,755  
Service cost for benefits earned during the period 1,326 1,401 $ 1,267
Interest cost on accumulated post retirement benefit 1,148 908 919
Net benefit payments and expense (1,207) (1,021)  
Actuarial loss (2,703) (1,837)  
Accumulated postretirement benefit obligation 28,770 30,206 $ 30,755
Liabilities:      
Current liabilities 1,625 1,449  
Non-currrent liabilities 27,145 28,757  
Total post retirement benefit liability recognized in statement of financial position 28,770 30,206  
Components included in accumulated other comprehensive income (loss):      
Unrecognized net loss (465) (3,237)  
Cumulative net periodic benefit cost (in excess of employer contribution) $ 28,305 $ 26,969  
v3.23.1
Employee Benefit Plans (Discount Rate Assumptions in Computation of Accumulated Postretirement Benefit Obligation) (Details)
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Accumulated postretirement benefit obligation 5.08% 3.76% 2.93%
v3.23.1
Employee Benefit Plans (Future Net Benefit Payments Expected for Post Employee Benefit Obligations) (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2022 $ 1,546
2023 1,768
2024 2,021
2025 2,270
2026 2,532
2027 through 2030 13,291
Total $ 23,428
v3.23.1
Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Assets    
Reinsurance recoverables and trade receivables, net $ 189,498 $ 229,343
Mortgage loans, Fair Value 444,957 450,347
Other investments 109,009 120,592
Total 743,464 800,282
Liabilities    
Notes, loans and leases payable, gross 5,710,735 5,875,781
Total 5,710,735 5,875,781
Level 1 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 0 0
Mortgage loans, Fair Value 0 0
Other investments 0 0
Total 0 0
Liabilities    
Notes, loans and leases payable, gross 0 0
Total 0 0
Level 2 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 0 0
Mortgage loans, Fair Value 0 0
Other investments 0 0
Total 0 0
Liabilities    
Notes, loans and leases payable, gross 5,710,735 5,875,781
Total 5,710,735 5,875,781
Level 3 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 189,498 229,343
Mortgage loans, Fair Value 444,957 450,347
Other investments 109,009 120,592
Total 743,464 800,282
Liabilities    
Notes, loans and leases payable, gross 0 0
Total 0 0
Carrying Value    
Assets    
Reinsurance recoverables and trade receivables, net 189,498 229,343
Mortgage loans, Fair Value 466,531 423,163
Other investments 109,009 120,592
Total 765,038 773,098
Liabilities    
Notes, loans and leases payable, gross 6,143,350 5,875,781
Total $ 6,143,350 $ 5,875,781
v3.23.1
Fair Value Measurements (Financial Instruments Level within the Fair Value Hierarchy) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Assets:    
Short-term investments $ 1,809,441 $ 2,482,154
Fixed maturities - available for sale 2,709,037 2,821,092
Preferred stock 21,982 26,095
Common stock 39,375 46,212
Derivatives 9,606 7,474
Total 4,589,441 5,383,027
Liabilities:    
Derivatives 0 587
Total 0 587
Level 1 [Member]    
Assets:    
Short-term investments 1,808,797 2,482,154
Fixed maturities - available for sale 251,832 26,914
Preferred stock 21,982 26,095
Common stock 39,375 46,212
Derivatives 4,295 7,474
Total 2,126,281 2,588,849
Liabilities:    
Derivatives 0 0
Total 0 0
Level 2 [Member]    
Assets:    
Short-term investments 644 0
Fixed maturities - available for sale 2,457,146 2,794,086
Preferred stock 0 0
Common stock 0 0
Derivatives 5,311 0
Total 2,463,101 2,794,086
Liabilities:    
Derivatives 0 587
Total 0 587
Level 3 [Member]    
Assets:    
Short-term investments 0 0
Fixed maturities - available for sale 59 92
Preferred stock 0 0
Common stock 0 0
Derivatives 0 0
Total 59 92
Liabilities:    
Derivatives 0 0
Total $ 0 $ 0
v3.23.1
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Year ended December 31,      
Direct amount (a) - Life insurance in force $ 970,454 $ 1,029,537 $ 1,031,634
Ceded to other companies - Life insurance in force 48 72 73
Assumed from other companies - Life insurance in force 304,891 328,030 356,266
Net amount (a) - Life insurance in force $ 1,275,297 $ 1,357,495 $ 1,387,827
Percentage of amount assumed to net - Life insurance in force 24.00% 24.00% 26.00%
Direct amount (a) $ 189,974 $ 194,849 $ 185,635
Ceded to Other Companies 153 162 212
Assumed from Other Companies 5,570 6,007 6,471
Net amount (a) 195,391 200,694 191,894
Premiums earned: Life [Member]      
Year ended December 31,      
Direct amount (a) 52,298 56,353 58,048
Ceded to Other Companies 1 2 1
Assumed from Other Companies 4,181 4,514 5,049
Net amount (a) $ 56,478 $ 60,865 $ 63,096
Percentage of amount assumed to net 7.00% 7.00% 8.00%
Premiums earned: Accident and health [Member]      
Year ended December 31,      
Direct amount (a) $ 41,354 $ 48,385 $ 57,081
Ceded to Other Companies 152 160 211
Assumed from Other Companies 983 1,166 1,388
Net amount (a) $ 42,185 $ 49,391 $ 58,258
Percentage of amount assumed to net 2.00% 2.00% 2.00%
Premiums earned: Annuity [Member]      
Year ended December 31,      
Direct amount (a) $ 80 $ 444 $ 221
Ceded to Other Companies 0 0 0
Assumed from Other Companies 406 327 34
Net amount (a) $ 486 $ 771 $ 255
Percentage of amount assumed to net 84.00% 42.00% 13.00%
Premiums earned: Property and casualty [Member]      
Year ended December 31,      
Direct amount (a) $ 96,242 $ 89,667 $ 70,285
Ceded to Other Companies 0 0 0
Assumed from Other Companies 0 0 0
Net amount (a) $ 96,242 $ 89,667 $ 70,285
Percentage of amount assumed to net 0.00% 0.00% 0.00%
v3.23.1
Reinsurance and Policy Benefits and Losses Claims and Loss Expenses Payable (Policy Benefits and Losses, Claims and Loss Expenses Payable for Property and Casualty Insurance) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reinsurance:            
Unpaid losses and loss adjustment expense   $ 151,874        
Total $ 875,034   $ 890,254      
Property and Casualty Insurance [Member]            
Reinsurance:            
Unpaid losses and loss adjustment expense   151,874   $ 159,162 $ 177,963 $ 209,127
Operating Segments [Member] | Property and Casualty Insurance [Member]            
Reinsurance:            
Unpaid losses and loss adjustment expense   151,874   159,162    
Reinsurance losses payable   1,133   1,217    
Total $ 153,007 $ 153,007 $ 160,379 $ 160,379    
v3.23.1
Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Activity in the Liability for Unpaid Losses and Loss Adjustment Expenses for Property and Casualty Insurance) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Paid related to:      
Net balance at December 31 $ 110,545    
Plus: reinsurance recoverables 41,329    
Balance at December 31 151,874    
Property and Casualty Insurance [Member]      
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Balance at January 1 159,162 $ 177,963 $ 209,127
Less: reinsurance recoverables 47,394 64,873 87,083
Net balance at January 1 111,768 113,090 122,044
Incurred related to:      
Current year 27,570 28,980 20,670
Prior years (5,828) (6,290) (3,865)
Total incurred 21,742 22,690 16,805
Paid related to:      
Current year 10,572 11,040 7,664
Prior years 12,393 12,972 18,095
Total paid 22,965 24,012 25,759
Net balance at December 31 110,545 111,768 113,090
Plus: reinsurance recoverables 41,329 47,394 64,873
Balance at December 31 151,874 159,162 $ 177,963
Operating Segments [Member] | Property and Casualty Insurance [Member]      
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Balance at January 1 159,162    
Paid related to:      
Balance at December 31 $ 151,874 $ 159,162  
v3.23.1
Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details)
$ in Thousands
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 22,201            
Accident Year 2016 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net 11,750 $ 11,764 $ 11,764 $ 11,790 $ 13,056 $ 13,011 $ 13,297
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 0            
Shortduration Insurance Contracts Number Of Reported Claims 11,681            
Accident Year 2017 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 15,264 15,273 15,538 17,078 16,109 $ 15,748  
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 0            
Shortduration Insurance Contracts Number Of Reported Claims 12,306            
Accident Year 2018 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 16,819 17,157 18,027 18,386 $ 19,580    
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 0            
Shortduration Insurance Contracts Number Of Reported Claims 12,182            
Accident Year 2019 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 27,831 27,316 26,316 $ 22,138      
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 1,663            
Shortduration Insurance Contracts Number Of Reported Claims 12,026            
Accident Year 2020 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 17,107 17,485 $ 20,671        
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 3,653            
Shortduration Insurance Contracts Number Of Reported Claims 11,530            
Accident Year 2021 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 25,337 $ 28,982          
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 5,809            
Shortduration Insurance Contracts Number Of Reported Claims 14,150            
Accident Year 2022 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net $ 27,570            
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net $ 11,076            
Shortduration Insurance Contracts Number Of Reported Claims 12,860            
v3.23.1
Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Cumulative Paid Claims And Allocated Claim Adjustment Expense Net Of Reinsurance) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net $ 103,345            
All outstanding liabilities before 2012, net of reinsurance 72,211            
Liabilities for claims and claim adjustment expenses, net of reinsurance 110,545            
Accident Year 2016 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 11,750 $ 11,764 $ 11,764 $ 11,746 $ 11,643 $ 10,665 $ 7,777
Accident Year 2017 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 15,264 15,263 15,012 14,825 11,638 $ 8,970  
Accident Year 2018 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 16,809 16,766 15,150 12,689 $ 8,838    
Accident Year 2019 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 21,598 19,215 14,737 $ 7,366      
Accident Year 2020 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 12,521 11,114 $ 7,665        
Accident Year 2021 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net 14,831 $ 11,040          
Accident Year 2022 [Member]              
Incurred claims development [Abstract]              
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net $ 10,572            
v3.23.1
Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Total Gross Liability For Unpaid Property And Casualty Claims And Claim Adjustment Expense) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net [Abstract]      
Liabilities for unpaid property and casualty claims and claim adjustment expenses, net of reinsurance   $ 110,545  
Total reinsurance recoverable on unpaid property and casualty claims $ 42,362 41,329 $ 50,586
Total gross liability for unpaid Property and Casualty claims and claim adjustment expense   $ 151,874  
v3.23.1
Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Average Annual Percentage Payout Of Incurred Claims By Age Net Of Reinsurance) (Details) - Property and Casualty Insurance [Member]
Dec. 31, 2022
Average annual Percentage Payout [Abstract]  
Year 1 47.20%
Year 2 21.10%
Year 3 13.60%
Year 4 5.10%
Year 5 0.70%
Year 6 0.00%
Year 7 0.00%
v3.23.1
Leases (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Leases [Abstract]      
Right Of Use Asset Obtained In Exchange For Operating Lease Liability $ 58.4 $ 74.2  
Right Of Use Asset Obtained In Exchange For Finance Lease Liability 223.2 347.4  
Operating Cash Flows For Financing Leases 32.1 30.2 $ 29.3
Cash paid for finance leases 124.2 166.3 221.2
Cash paid for operating leases $ 9.5 $ 3.7 $ 6.8
v3.23.1
Leases (Components Right Of Use Assets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Finance Lease [Abstract]    
Building and Improvements $ 128,221 $ 136,444
Furniture and equipment 9,687 14,731
Rental trailers and rental equipment 152,294 169,514
Rental trucks 949,838 1,114,248
Right Of Use Assets Gross 1,240,040 1,434,937
less: accumulated depreciation (706,358) (739,731)
Right of use assets, net 533,682 695,206
Finance Lease [Member]    
Finance Lease [Abstract]    
Building and Improvements 0 0
Furniture and equipment 9,687 14,731
Rental trailers and rental equipment 152,294 169,514
Rental trucks 949,838 1,114,248
Right Of Use Assets Gross 1,111,819 1,298,493
less: accumulated depreciation (637,054) (677,669)
Right of use assets, net 474,765 620,824
Operating Lease [Member]    
Finance Lease [Abstract]    
Building and Improvements 128,221 136,444
Furniture and equipment 0 0
Rental trailers and rental equipment 0 0
Rental trucks 0 0
Right Of Use Assets Gross 128,221 136,444
less: accumulated depreciation (69,304) (62,062)
Right of use assets, net $ 58,917 $ 74,382
v3.23.1
Leases (Finance Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Finance Leases Weighted Average Remaining Lease Term And Discount Rate [Abstract]    
Remaining Lease Term Finance Lease Weighted Average 2 3
Finance Lease Weighted Average Discount Rate Percent 3.80% 3.70%
v3.23.1
Leases (Operating Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating Leases Remaining Lease Term And Weighted Average Discount Rate [Abstract]    
Remaining Lease Term Operating Lease Weighted Average 19.2 16.5
Operating Lease Weighted Average Discount Rate Percent 4.70% 4.60%
v3.23.1
Leases (Components Of Lease Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Lease Cost [Abstract]    
Operating Lease cost $ 32,878 $ 30,239
Finance Lease Liability [Abstract]    
Amortization of right-of-use assets 81,006 115,199
Interest on lease liabilities 11,199 15,289
Sum of finance lease cost $ 92,205 $ 130,488
v3.23.1
Leases (Maturities Of Lease Liabilities) (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Finance Lease Liabilities Payments Due [Abstract]  
2024 $ 110,812
2025 77,621
2026 46,763
2027 0
2028 0
Thereafter 0
Total lease payments 235,196
Less: imputed interest (11,991)
Finance Lease Liability 223,205
Operating Lease Liabilities Payments Due [Abstract]  
2024 24,338
2025 11,540
2026 4,957
2027 3,555
2028 2,951
Thereafter 56,615
Total lease payments 103,956
Less: imputed interest (45,583)
Operating Lease Liability $ 58,373
v3.23.1
Related Party Transactions (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Related party notes receivable:      
One time cash interest proceeds $ 4.0    
Property Management Fee [Abstract]      
Management fees received exclusive of reimbursed expenses $ 37.0 $ 38.5 $ 31.2
Minimum [Member]      
Property Management Fee [Abstract]      
Management fee rate 4.00%    
Maximum [Member]      
Property Management Fee [Abstract]      
Management fee rate 10.00%    
Sac Holdings [Member]      
Related party costs and expenses:      
Revenue, excluding dealer agreement commissions and expenses $ 29.8 28.5 25.5
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member]      
Related party costs and expenses:      
Expenses, related parties 2.4 2.4 2.6
Cash flow, related party 27.4 25.9 22.6
Revenue, generated by the dealer agreement from related parties 418.9 417.9 323.8
Commission expenses, generated from dealer agreement with related parties $ 88.1 $ 88.3 $ 69.2
v3.23.1
Related Party Transactions (Related Party Revenue) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Related party transactions:      
Management fees revenue $ 37,073 $ 35,194 $ 31,603
Blackwater [Member]      
Related party transactions:      
Management fees revenue 29,825 28,546 25,512
Mercury [Member]      
Related party transactions:      
Management fees revenue $ 7,248 $ 6,648 $ 6,091
v3.23.1
Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Related Party Cost and Expense [Abstract]      
Related party expenses, total $ 90,483 $ 90,733 $ 71,824
Blackwater [Member]      
Related Party Cost and Expense [Abstract]      
U-Haul lease expenses 2,416 2,445 2,612
U-Haul commission expenses $ 88,067 $ 88,288 $ 69,212
v3.23.1
Related Party Transactions (Related Party Assets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Related party assets:    
U-Haul receivables $ 6,324 $ 6,364
Assets 48,308 47,851
Blackwater [Member]    
Related party assets:    
Notes receivable 42,141 41,364
Mercury [Member]    
Related party assets:    
Notes receivable 8,402 5,708
Insurance Subsidiaries [Member]    
Related party assets:    
Other $ (2,235) $ 779
v3.23.1
Statutory Financial Information of Insurance Subsidiaries (Net income (loss) Capital and Surplus (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Repwest [Member]      
Statutory financial information of insurance subsidiaries:      
Audit statutory net income (loss) $ 34,963 $ 33,314 $ 22,898
Audited statutory capital and surplus 294,515 266,875 227,380
ARCOA [Member]      
Statutory financial information of insurance subsidiaries:      
Audit statutory net income (loss) 2,319 (752) 2,438
Audited statutory capital and surplus 13,340 14,697 15,928
Oxford [Member]      
Statutory financial information of insurance subsidiaries:      
Audit statutory net income (loss) (771) 23,217 6,296
Audited statutory capital and surplus 227,667 230,202 218,301
CFLIC [Member]      
Statutory financial information of insurance subsidiaries:      
Audit statutory net income (loss) 3,637 6,019 8,082
Audited statutory capital and surplus 20,591 17,098 25,980
NAI [Member]      
Statutory financial information of insurance subsidiaries:      
Audit statutory net income (loss) 1,017 1,874 2,127
Audited statutory capital and surplus $ 8,906 $ 7,961 $ 13,980
v3.23.1
Financial Information by Geographic Area (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Fiscal year ended:      
Total revenues $ 5,864,691 $ 5,739,747 $ 4,541,985
Depreciation and amortization, net of (gains) losses on disposals 520,315 512,486 641,504
Interest expense 223,958 167,424 163,502
Pretax earnings 1,217,923 1,475,497 796,658
Income tax expense 294,925 352,211 185,802
Identifiable assets 18,124,648 17,299,581 14,651,606
United States [Member]      
Fiscal year ended:      
Total revenues 5,570,264 5,452,027 4,334,083
Depreciation and amortization, net of (gains) losses on disposals 514,043 509,517 631,344
Interest expense 221,008 163,586 160,429
Pretax earnings 1,178,264 1,431,155 773,030
Income tax expense 285,724 342,213 180,845
Identifiable assets 17,453,015 16,776,070 14,212,978
Canada [Member]      
Fiscal year ended:      
Total revenues 294,427 287,720 207,902
Depreciation and amortization, net of (gains) losses on disposals 6,272 2,969 10,160
Interest expense 2,950 3,838 3,073
Pretax earnings 39,659 44,342 23,628
Income tax expense 9,201 9,998 4,957
Identifiable assets $ 671,633 $ 523,511 $ 438,628
v3.23.1
Consolidating financial information by industry segment (Balance Sheets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
ASSETS:          
Cash and cash equivalents $ 2,060,524   $ 2,704,137    
Reinsurance recoverables and trade receivables, net 189,498   229,343    
Inventories, net 151,474   158,888    
Prepaid expenses 241,711   236,915    
Investments, fixed maturities and marketable equities 2,770,394   2,893,399    
Investments, other 575,540   543,755    
Deferred policy acquisition costs, net 152,377   103,828    
Other assets 51,052   60,409    
Right of use assets, financing, net 474,765   620,824    
Right of use assets, operating 58,917   74,382    
Related party assets 48,308   47,851    
Subtotal assets 6,774,560   7,673,731    
Investments in subsidiaries 0   0    
Property, plant and equipment, at cost:          
Land 1,537,206   1,283,142    
Buildings and improvements 7,088,810   5,974,639    
Furniture and equipment 928,241   846,132    
Property, plant and equipment (gross) 15,660,293   13,358,406    
Less: Accumulated depreciation (4,310,205)   (3,732,556)    
Total property, plant and equipment 11,350,088   9,625,850    
Total assets 18,124,648   17,299,581   $ 14,651,606
Liabilities:          
Accounts payable and accrued expenses 761,039   677,785    
Notes, loans and leases payable 6,108,042   6,022,497    
Operating lease liabilities 58,373   74,197    
Policy benefits and losses, claims and loss expenses payable 875,034   890,254    
Liabilities from investment contracts 2,398,884   2,336,238    
Other policyholders' funds and liabilities 8,232   10,812    
Deferred income 52,282   49,157    
Deferred income taxes 1,334,427   1,286,149    
Related party liabilities 0   0    
Total liabilities 11,596,313   11,347,089    
Stockholders' equity:          
Additional paid-in capital 453,643   453,819    
Accumulated other comprehensive loss (267,046)   46,384    
Retained earnings 7,008,715   6,119,442    
Total stockholders' equity 6,528,335   5,952,492    
Total liabilities and stockholders' equity 18,124,648   17,299,581    
Rental Trailers and Other Rental Equipment [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 827,696   615,679    
Rental Trucks [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 5,278,340   4,638,814    
Series A Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Series B Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Series A Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 0   0    
Amerco Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 10,497   10,497    
Common Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value (525,653)   (525,653)    
Preferred Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value (151,997)   (151,997)    
Operating Segments [Member] | Moving and Storage Consolidations [Member]          
ASSETS:          
Cash and cash equivalents 2,034,242   2,643,213    
Reinsurance recoverables and trade receivables, net 107,823   142,895    
Inventories, net 151,474   158,888    
Prepaid expenses 241,711   236,915    
Investments, fixed maturities and marketable equities 227,737   0    
Investments, other 23,314   20,653    
Deferred policy acquisition costs, net 0   0    
Other assets 46,438   57,305    
Right of use assets, financing, net 474,765   620,824    
Right of use assets, operating 57,978   74,190    
Related party assets 69,144   64,611    
Subtotal assets 3,434,626   4,019,494    
Investments in subsidiaries 450,923   737,073    
Property, plant and equipment, at cost:          
Land 1,537,206   1,283,142    
Buildings and improvements 7,088,810   5,974,639    
Furniture and equipment 928,241   846,132    
Property, plant and equipment (gross) 15,660,293   13,358,406    
Less: Accumulated depreciation (4,310,205)   (3,732,556)    
Total property, plant and equipment 11,350,088   9,625,850    
Total assets 15,235,637   14,382,417    
Liabilities:          
Accounts payable and accrued expenses 729,679   663,482    
Notes, loans and leases payable 6,108,042   6,022,497    
Operating lease liabilities 57,418   73,998    
Policy benefits and losses, claims and loss expenses payable 335,227   330,890    
Liabilities from investment contracts 0   0    
Other policyholders' funds and liabilities 0   0    
Deferred income 52,282   49,157    
Deferred income taxes 1,405,391   1,265,430    
Related party liabilities 25,082   25,668    
Total liabilities 8,713,121   8,431,122    
Stockholders' equity:          
Additional paid-in capital 453,853   454,029    
Accumulated other comprehensive loss (272,865)   45,187    
Retained earnings 7,008,505   6,119,232    
Total stockholders' equity 6,522,516   5,951,295    
Total liabilities and stockholders' equity 15,235,637   14,382,417    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 827,696   615,679    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 5,278,340   4,638,814    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 0   0    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 10,497   10,497    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value (525,653)   (525,653)    
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value (151,997)   (151,997)    
Operating Segments [Member] | Property and Casualty Insurance [Member]          
ASSETS:          
Cash and cash equivalents 11,276   10,800    
Reinsurance recoverables and trade receivables, net 48,344   50,235    
Inventories, net 0   0    
Prepaid expenses 0   0    
Investments, fixed maturities and marketable equities 271,156   297,488    
Investments, other 125,130   114,269    
Deferred policy acquisition costs, net 0   0    
Other assets 730   371    
Right of use assets, financing, net 0   0    
Right of use assets, operating 914   93    
Related party assets 2,347   6,713    
Subtotal assets 459,897   479,969    
Investments in subsidiaries 0   0    
Property, plant and equipment, at cost:          
Land 0   0    
Buildings and improvements 0   0    
Furniture and equipment 0   0    
Property, plant and equipment (gross) 0   0    
Less: Accumulated depreciation 0   0    
Total property, plant and equipment 0   0    
Total assets 459,897   479,969    
Liabilities:          
Accounts payable and accrued expenses 4,470   3,849    
Notes, loans and leases payable 0   0    
Operating lease liabilities 928   93    
Policy benefits and losses, claims and loss expenses payable 153,007 $ 153,007 160,379 $ 160,379  
Liabilities from investment contracts 0   0    
Other policyholders' funds and liabilities 2,702   3,521    
Deferred income 0   0    
Deferred income taxes 1,713   12,803    
Related party liabilities 2,544   3,196    
Total liabilities 165,364   183,841    
Stockholders' equity:          
Additional paid-in capital 91,120   91,120    
Accumulated other comprehensive loss (14,720)   16,630    
Retained earnings 214,832   185,077    
Total stockholders' equity 294,533   296,128    
Total liabilities and stockholders' equity 459,897   479,969    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trucks [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series B Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Amerco Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 3,301   3,301    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Common Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value 0   0    
Operating Segments [Member] | Property and Casualty Insurance [Member] | Preferred Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value 0   0    
Operating Segments [Member] | Life Insurance [Member]          
ASSETS:          
Cash and cash equivalents 15,006   50,124    
Reinsurance recoverables and trade receivables, net 33,331   36,213    
Inventories, net 0   0    
Prepaid expenses 0   0    
Investments, fixed maturities and marketable equities 2,271,501   2,595,911    
Investments, other 427,096   408,833    
Deferred policy acquisition costs, net 152,377   103,828    
Other assets 3,884   2,733    
Right of use assets, financing, net 0   0    
Right of use assets, operating 25   99    
Related party assets 12,268   16,911    
Subtotal assets 2,915,488   3,214,652    
Investments in subsidiaries 0   0    
Property, plant and equipment, at cost:          
Land 0   0    
Buildings and improvements 0   0    
Furniture and equipment 0   0    
Property, plant and equipment (gross) 0   0    
Less: Accumulated depreciation 0   0    
Total property, plant and equipment 0   0    
Total assets 2,915,488   3,214,652    
Liabilities:          
Accounts payable and accrued expenses 26,890   10,454    
Notes, loans and leases payable 0   0    
Operating lease liabilities 27   106    
Policy benefits and losses, claims and loss expenses payable 386,800   398,985    
Liabilities from investment contracts 2,398,884   2,336,238    
Other policyholders' funds and liabilities 5,530   7,291    
Deferred income 0   0    
Deferred income taxes (72,677)   7,916    
Related party liabilities 13,644   12,717    
Total liabilities 2,759,098   2,773,707    
Stockholders' equity:          
Additional paid-in capital 26,271   26,271    
Accumulated other comprehensive loss (207,327)   87,200    
Retained earnings 334,946   324,974    
Total stockholders' equity 156,390   440,945    
Total liabilities and stockholders' equity 2,915,488   3,214,652    
Operating Segments [Member] | Life Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Operating Segments [Member] | Life Insurance [Member] | Rental Trucks [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Operating Segments [Member] | Life Insurance [Member] | Series A Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Life Insurance [Member] | Series B Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Operating Segments [Member] | Life Insurance [Member] | Series A Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 0   0    
Operating Segments [Member] | Life Insurance [Member] | Amerco Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 2,500   2,500    
Operating Segments [Member] | Life Insurance [Member] | Common Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value 0   0    
Operating Segments [Member] | Life Insurance [Member] | Preferred Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value 0   0    
Eliminations [Member]          
ASSETS:          
Cash and cash equivalents 0   0    
Reinsurance recoverables and trade receivables, net 0   0    
Inventories, net 0   0    
Prepaid expenses 0   0    
Investments, fixed maturities and marketable equities 0   0    
Investments, other 0   0    
Deferred policy acquisition costs, net 0   0    
Other assets 0   0    
Right of use assets, financing, net 0   0    
Right of use assets, operating 0   0    
Related party assets (35,451)   (40,384)    
Subtotal assets (35,451)   (40,384)    
Investments in subsidiaries (450,923)   (737,073)    
Property, plant and equipment, at cost:          
Land 0   0    
Buildings and improvements 0   0    
Furniture and equipment 0   0    
Property, plant and equipment (gross) 0   0    
Less: Accumulated depreciation 0   0    
Total property, plant and equipment 0   0    
Total assets (486,374)   (777,457)    
Liabilities:          
Accounts payable and accrued expenses 0   0    
Notes, loans and leases payable 0   0    
Operating lease liabilities 0   0    
Policy benefits and losses, claims and loss expenses payable 0   0    
Liabilities from investment contracts 0   0    
Other policyholders' funds and liabilities 0   0    
Deferred income 0   0    
Deferred income taxes 0   0    
Related party liabilities (41,270)   (41,581)    
Total liabilities (41,270)   (41,581)    
Stockholders' equity:          
Additional paid-in capital (117,601)   (117,601)    
Accumulated other comprehensive loss 227,866   (102,633)    
Retained earnings (549,568)   (509,841)    
Total stockholders' equity (445,104)   (735,876)    
Total liabilities and stockholders' equity (486,374)   (777,457)    
Eliminations [Member] | Rental Trailers and Other Rental Equipment [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Eliminations [Member] | Rental Trucks [Member]          
Property, plant and equipment, at cost:          
Property subject to or available for operating lease, gross 0   0    
Eliminations [Member] | Series A Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Eliminations [Member] | Series B Preferred Stock [Member]          
Stockholders' equity:          
Preferred stock, value, issued 0   0    
Eliminations [Member] | Series A Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued 0   0    
Eliminations [Member] | Amerco Common Stock [Member]          
Stockholders' equity:          
Common stock, value, issued (5,801)   (5,801)    
Eliminations [Member] | Common Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value 0   0    
Eliminations [Member] | Preferred Stock in Treasury [Member]          
Stockholders' equity:          
Treasury stock, value $ 0   $ 0    
v3.23.1
Consolidating financial information by industry segment (Statement of Operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Revenues:      
Self-moving equipment rentals $ 3,877,917 $ 3,958,807 $ 3,083,317
Self-storage revenues 744,492 617,120 477,262
Self-moving and self-storage products and service sales 357,286 351,447 344,929
Property management fees 37,073 35,194 31,603
Life insurance premiums 99,149 111,027 121,609
Property and casualty insurance premiums 93,209 86,518 68,779
Net investment and interest income 176,679 148,261 122,938
Other revenue 478,886 431,373 291,548
Total revenues 5,864,691 5,739,747 4,541,985
Costs and expenses:      
Operating expenses 3,024,547 2,676,541 2,187,684
Commission expenses 416,315 429,581 329,609
Cost of sales 263,026 259,585 214,059
Benefits and losses 165,553 186,647 179,512
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Lease expense 30,829 29,910 28,470
Depreciation, net of (gains) losses on disposals 486,795 482,752 609,930
Net gains on disposal of real estate 5,596 (4,120) 3,281
Total costs and expenses 4,420,585 4,094,750 3,580,838
Earnings from operations before equity in earnings of subsidiaries 1,444,106 1,644,997 961,147
Equity in earnings of subsidiaries 0 0 0
Earnings from operations 1,444,106 1,644,997 961,147
Other components of net periodic benefit costs (1,216) (1,120) (987)
Interest expense (223,958) (167,424) (163,502)
Fees and amortization on early extinguishment of debt (1,009) (956) 0
Pretax earnings 1,217,923 1,475,497 796,658
Income tax expense (294,925) (352,211) (185,802)
Earnings available to common shareholders 922,998 1,123,286 610,856
Operating Segments [Member] | Moving and Storage Consolidations [Member]      
Revenues:      
Self-moving equipment rentals 3,882,620 3,963,535 3,086,824
Self-storage revenues 744,492 617,120 477,262
Self-moving and self-storage products and service sales 357,286 351,447 344,929
Property management fees 37,073 35,194 31,603
Life insurance premiums 0 0 0
Property and casualty insurance premiums 0 0 0
Net investment and interest income 70,992 3,135 2,259
Other revenue 475,251 427,836 288,797
Total revenues 5,567,714 5,398,267 4,231,674
Costs and expenses:      
Operating expenses 2,966,982 2,621,270 2,137,381
Commission expenses 416,315 429,581 329,609
Cost of sales 263,026 259,585 214,059
Benefits and losses 0 0 0
Amortization of deferred policy acquisition costs 0 0 0
Lease expense 32,878 31,973 30,551
Depreciation, net of (gains) losses on disposals 486,795 482,752 609,930
Net gains on disposal of real estate 5,596 (4,120) 3,281
Total costs and expenses 4,171,592 3,821,041 3,324,811
Earnings from operations before equity in earnings of subsidiaries 1,396,122 1,577,226 906,863
Equity in earnings of subsidiaries 39,727 54,746 44,441
Earnings from operations 1,435,849 1,631,972 951,304
Other components of net periodic benefit costs (1,216) (1,120) (987)
Interest expense (224,999) (168,491) (164,592)
Fees and amortization on early extinguishment of debt (1,009) (956)  
Pretax earnings 1,208,625 1,461,405 785,725
Income tax expense (285,627) (338,119) (174,869)
Earnings available to common shareholders 922,998 1,123,286 610,856
Operating Segments [Member] | Property and Casualty Insurance [Member]      
Revenues:      
Self-moving equipment rentals 0 0 0
Self-storage revenues 0 0 0
Self-moving and self-storage products and service sales 0 0 0
Property management fees 0 0 0
Life insurance premiums 0 0 0
Property and casualty insurance premiums 96,242 89,667 70,285
Net investment and interest income 7,270 25,376 16,452
Other revenue 0 0 0
Total revenues 103,512 115,043 86,737
Costs and expenses:      
Operating expenses 45,035 42,456 35,450
Commission expenses 0 0 0
Cost of sales 0 0 0
Benefits and losses 21,535 22,448 18,558
Amortization of deferred policy acquisition costs 0 0 0
Lease expense 372 359 231
Depreciation, net of (gains) losses on disposals 0 0 0
Net gains on disposal of real estate 0 0 0
Total costs and expenses 66,942 65,263 54,239
Earnings from operations before equity in earnings of subsidiaries 36,570 49,780 32,498
Equity in earnings of subsidiaries 0 0 0
Earnings from operations 36,570 49,780 32,498
Other components of net periodic benefit costs 0 0 0
Interest expense 0 0 0
Fees and amortization on early extinguishment of debt 0 0  
Pretax earnings 36,570 49,780 32,498
Income tax expense (6,815) (10,378) (6,778)
Earnings available to common shareholders 29,755 39,402 25,720
Operating Segments [Member] | Life Insurance [Member]      
Revenues:      
Self-moving equipment rentals 0 0 0
Self-storage revenues 0 0 0
Self-moving and self-storage products and service sales 0 0 0
Property management fees 0 0 0
Life insurance premiums 99,149 111,027 121,609
Property and casualty insurance premiums 0 0 0
Net investment and interest income 102,448 123,809 107,745
Other revenue 4,503 3,976 3,280
Total revenues 206,100 238,812 232,634
Costs and expenses:      
Operating expenses 21,115 21,112 20,376
Commission expenses 0 0 0
Cost of sales 0 0 0
Benefits and losses 144,018 164,199 160,954
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Lease expense 108 109 135
Depreciation, net of (gains) losses on disposals 0 0 0
Net gains on disposal of real estate 0 0 0
Total costs and expenses 193,165 219,274 209,758
Earnings from operations before equity in earnings of subsidiaries 12,935 19,538 22,876
Equity in earnings of subsidiaries 0 0 0
Earnings from operations 12,935 19,538 22,876
Other components of net periodic benefit costs 0 0 0
Interest expense (480) (480) 0
Fees and amortization on early extinguishment of debt 0 0  
Pretax earnings 12,455 19,058 22,876
Income tax expense (2,483) (3,714) (4,155)
Earnings available to common shareholders 9,972 15,344 18,721
Eliminations [Member]      
Revenues:      
Self-moving equipment rentals (4,703) (4,728) (3,507)
Self-storage revenues 0 0 0
Self-moving and self-storage products and service sales 0 0 0
Property management fees 0 0 0
Life insurance premiums 0 0 0
Property and casualty insurance premiums (3,033) (3,149) (1,506)
Net investment and interest income (4,031) (4,059) (3,518)
Other revenue (868) (439) (529)
Total revenues (12,635) (12,375) (9,060)
Costs and expenses:      
Operating expenses (8,585) (8,297) (5,523)
Commission expenses 0 0 0
Cost of sales 0 0 0
Benefits and losses 0 0 0
Amortization of deferred policy acquisition costs 0 0 0
Lease expense (2,529) (2,531) (2,447)
Depreciation, net of (gains) losses on disposals 0 0 0
Net gains on disposal of real estate 0 0 0
Total costs and expenses (11,114) (10,828) (7,970)
Earnings from operations before equity in earnings of subsidiaries (1,521) (1,547) (1,090)
Equity in earnings of subsidiaries (39,727) (54,746) (44,441)
Earnings from operations (41,248) (56,293) (45,531)
Other components of net periodic benefit costs 0 0 0
Interest expense 1,521 1,547 1,090
Fees and amortization on early extinguishment of debt 0 0  
Pretax earnings (39,727) (54,746) (44,441)
Income tax expense 0 0 0
Earnings available to common shareholders $ (39,727) $ (54,746) $ (44,441)
v3.23.1
Consolidating financial information by industry segment (Cash Flow Statements) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Cash flow from operating activities:      
Net earnings $ 922,998 $ 1,123,286 $ 610,856
Earnings from consolidated subsidiaries 0 0 0
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 733,879 696,955 664,001
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Amortization of premiums and accretion of discounts related to investments, inc 20,066 19,749 14,229
Amortization of debt issuance costs 7,087 5,659 5,948
Interest credited to policyholders 55,822 64,692 55,321
Change in allowance for losses on trade receivables (4,860) 4,227 1,206
Change in allowance for inventory reserves 9,490 15,235 1,298
Net gains on disposal of personal property (247,084) (214,203) (54,071)
Net gains on disposal of real estate 5,596 (4,120) 3,281
Net gains on sales of investments 8,300 (11,872) (10,058)
Net (gains) losses on equity investments 9,091 (7,837) (394)
Deferred income taxes 131,754 101,091 68,411
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 44,714 (9,187) (39,516)
Inventories and parts (2,225) (68,536) (5,775)
Prepaid expenses (5,575) 232,342 94,359
Capitalization of deferred policy acquisition costs (25,202) (32,626) (36,162)
Other assets 16,027 15,349 44,251
Related party assets (544) (10,357) (487)
Accounts payable and accrued expenses 34,263 10,514 78,718
Policy benefits and losses, claims and loss expenses payable (13,708) (19,692) (1,992)
Other policyholders' funds and liabilities (2,580) (1,608) 2,230
Deferred income 5,137 5,399 11,388
Related party liabilities (760) (2,079) 60
Net cash provided by operating activities 1,729,610 1,946,235 1,535,395
Cash flow from investing activities:      
Escrow deposits 9,298 (9,328) (5,221)
Purchase of:      
Property, plant and equipment (2,723,901) (2,136,537) (1,441,475)
Short term investments (60,037) (74,418) (69,929)
Fixed maturities investments (563,452) (627,326) (606,233)
Equity Securities (4,932) (19,299) (962)
Preferred stock 0 (8,000) (16,144)
Real estate (8,685) (261) (622)
Mortgage loans (204,579) (158,147) (158,071)
Proceeds from sale and paydowns of:      
Property, plant and equipment 701,331 623,235 537,484
Short term investments 74,457 51,591 69,718
Fixed maturities investments 196,635 360,937 529,239
Equity Securities 1,286 2,046 207
Preferred stock 0 2,000 2,700
Real estate 0 113 255
Mortgage loans 161,194 126,218 29,525
Net cash used by investing activities (2,421,385) (1,867,176) (1,129,529)
Cash flow from financing activities:      
Borrowings from credit facilities 1,017,898 1,969,474 922,008
Principal repayments on credit facilities (801,994) (437,506) (662,588)
Debt issuance costs (5,237) (13,156) (5,793)
Capital lease payments (124,188) (166,262) (221,247)
Securitization deposits 217 0 0
Voting Common stock dividends paid (19,608) (29,412) (49,019)
Series N Non-Voting Common Stock Dividends (14,117) 0 0
Net contribution from (to) related party     0
Investment contract deposits 341,483 347,520 517,856
Investment contract withdrawals (334,659) (237,503) (213,864)
Net cash provided by financing activities 59,795 1,433,155 287,353
Effects of exchange rate on cash (11,633) (2,089) 6,441
Increase (decrease) cash and cash equivalents (643,613) 1,510,125 699,660
Cash and cash equivalents at beginning of period 2,704,137 1,194,012 494,352
Cash and cash equivalents at the end of period 2,060,524 2,704,137 1,194,012
Property and Casualty Insurance [Member]      
Cash flow from financing activities:      
Effects of exchange rate on cash 0    
Increase (decrease) cash and cash equivalents 476    
Cash and cash equivalents at beginning of period 10,800    
Cash and cash equivalents at the end of period 11,276 10,800  
Life Insurance [Member]      
Cash flow from financing activities:      
Effects of exchange rate on cash 0    
Increase (decrease) cash and cash equivalents (35,118)    
Cash and cash equivalents at beginning of period 50,124    
Cash and cash equivalents at the end of period 15,006 50,124  
Operating Segments [Member] | Moving and Storage Consolidations [Member]      
Cash flow from operating activities:      
Net earnings 922,998 1,123,286 610,856
Earnings from consolidated subsidiaries (39,727) (54,746) (44,441)
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 733,879 696,955 664,001
Amortization of deferred policy acquisition costs 0 0 0
Amortization of premiums and accretion of discounts related to investments, inc 0 0 0
Amortization of debt issuance costs 7,087 5,659 5,948
Interest credited to policyholders 0 0 0
Change in allowance for losses on trade receivables (4,714) 4,689 1,424
Change in allowance for inventory reserves 9,490 15,235 1,298
Net gains on disposal of personal property (247,084) (214,203) (54,071)
Net gains on disposal of real estate 5,596 (4,120) 3,281
Net gains on sales of investments 0 0 0
Net (gains) losses on equity investments 0 0 0
Deferred income taxes 137,159 106,869 72,407
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 39,510 (28,776) (60,806)
Inventories and parts (2,225) (68,536) (5,775)
Prepaid expenses (5,575) 232,342 94,359
Capitalization of deferred policy acquisition costs 0 0 0
Other assets 17,102 15,136 44,265
Related party assets (4,898) (10,517) (12,790)
Accounts payable and accrued expenses 16,935 5,601 82,102
Policy benefits and losses, claims and loss expenses payable 5,849 (8,428) 14,919
Other policyholders' funds and liabilities 0 0 0
Deferred income 3,371 6,551 10,780
Related party liabilities (1,048) 255 1,136
Net cash provided by operating activities 1,593,705 1,823,252 1,428,893
Cash flow from investing activities:      
Escrow deposits 9,298 (9,328) (5,221)
Purchase of:      
Property, plant and equipment (2,726,967) (2,136,537) (1,441,475)
Short term investments 0 0 0
Fixed maturities investments (224,999) 0 0
Equity Securities 0 0 0
Preferred stock   0 0
Real estate (2,677) (33) 0
Mortgage loans 0 0 0
Proceeds from sale and paydowns of:      
Property, plant and equipment 701,331 623,235 537,484
Short term investments 0 0 0
Fixed maturities investments 0 0 0
Equity Securities 0 0 0
Preferred stock   0 0
Real estate 0 113 255
Mortgage loans 0 0 0
Net cash used by investing activities (2,244,014) (1,522,550) (908,957)
Cash flow from financing activities:      
Borrowings from credit facilities 1,017,898 1,969,474 912,408
Principal repayments on credit facilities (801,994) (426,319) (652,728)
Debt issuance costs (5,237) (13,156) (5,793)
Capital lease payments (124,188) (166,262) (221,247)
Securitization deposits 217    
Voting Common stock dividends paid (19,608) (29,412) (49,019)
Series N Non-Voting Common Stock Dividends (14,117)    
Net contribution from (to) related party     41,199
Investment contract deposits 0 0 0
Investment contract withdrawals 0 0 0
Net cash provided by financing activities 52,971 1,334,325 24,820
Effects of exchange rate on cash (11,633) (2,089) 6,441
Increase (decrease) cash and cash equivalents (608,971) 1,632,938 551,197
Cash and cash equivalents at beginning of period 2,643,213 1,010,275 459,078
Cash and cash equivalents at the end of period 2,034,242 2,643,213 1,010,275
Operating Segments [Member] | Property and Casualty Insurance [Member]      
Cash flow from operating activities:      
Net earnings 29,755 39,402 25,720
Earnings from consolidated subsidiaries 0 0 0
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 0 0 0
Amortization of deferred policy acquisition costs 0 0 0
Amortization of premiums and accretion of discounts related to investments, inc 1,691 1,638 1,578
Amortization of debt issuance costs 0 0 0
Interest credited to policyholders 0 0 0
Change in allowance for losses on trade receivables (146) (456) (217)
Change in allowance for inventory reserves 0 0 0
Net gains on disposal of personal property 0 0 0
Net gains on disposal of real estate 0 0 0
Net gains on sales of investments 44 (991) (158)
Net (gains) losses on equity investments 9,091 (7,837) (394)
Deferred income taxes (2,757) 1,347 459
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 2,322 17,180 27,302
Inventories and parts 0 0 0
Prepaid expenses 0 0 0
Capitalization of deferred policy acquisition costs 0 0 0
Other assets 2 346 537
Related party assets 4,354 160 303
Accounts payable and accrued expenses 625 1,821 (3,497)
Policy benefits and losses, claims and loss expenses payable (7,372) (18,563) (31,398)
Other policyholders' funds and liabilities (819) (177) (2,053)
Deferred income 0 0 0
Related party liabilities (640) (2,644) 1,187
Net cash provided by operating activities 36,150 31,226 19,369
Cash flow from investing activities:      
Escrow deposits 0 0 0
Purchase of:      
Property, plant and equipment 0 0 0
Short term investments (59,425) (74,418) (69,929)
Fixed maturities investments (41,391) (10,248) (18,823)
Equity Securities (3,281) (17,919) 0
Preferred stock   0 0
Real estate (5,031) (59) 0
Mortgage loans (37,612) (24,032) (18,035)
Proceeds from sale and paydowns of:      
Property, plant and equipment 0 0 0
Short term investments 74,457 50,737 69,669
Fixed maturities investments 18,940 24,201 20,854
Equity Securities 1,280 20 0
Preferred stock   2,000 2,700
Real estate 0 0 0
Mortgage loans 16,389 23,634 17,659
Net cash used by investing activities (35,674) (26,084) 4,095
Cash flow from financing activities:      
Borrowings from credit facilities 0 0 0
Principal repayments on credit facilities 0 0 0
Debt issuance costs 0 0 0
Capital lease payments 0 0 0
Securitization deposits 0    
Voting Common stock dividends paid 0 0 0
Series N Non-Voting Common Stock Dividends 0    
Net contribution from (to) related party     (22,600)
Investment contract deposits 0 0 0
Investment contract withdrawals 0 0 0
Net cash provided by financing activities 0 0 (22,600)
Effects of exchange rate on cash   0 0
Increase (decrease) cash and cash equivalents   5,142 864
Cash and cash equivalents at beginning of period 10,800 5,658 4,794
Cash and cash equivalents at the end of period   10,800 5,658
Operating Segments [Member] | Life Insurance [Member]      
Cash flow from operating activities:      
Net earnings 9,972 15,344 18,721
Earnings from consolidated subsidiaries 0 0 0
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 0 0 0
Amortization of deferred policy acquisition costs 27,924 33,854 28,293
Amortization of premiums and accretion of discounts related to investments, inc 18,375 18,111 12,651
Amortization of debt issuance costs 0 0 0
Interest credited to policyholders 55,822 64,692 55,321
Change in allowance for losses on trade receivables 0 (6) (1)
Change in allowance for inventory reserves 0 0 0
Net gains on disposal of personal property 0 0 0
Net gains on disposal of real estate 0 0 0
Net gains on sales of investments 8,256 (10,881) (9,900)
Net (gains) losses on equity investments 0 0 0
Deferred income taxes (2,648) (7,125) (4,455)
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 2,882 2,409 (6,012)
Inventories and parts 0 0 0
Prepaid expenses 0 0 0
Capitalization of deferred policy acquisition costs (25,202) (32,626) (36,162)
Other assets (1,077) (133) (551)
Related party assets 0 0 0
Accounts payable and accrued expenses 16,703 3,092 113
Policy benefits and losses, claims and loss expenses payable (12,185) 7,299 14,487
Other policyholders' funds and liabilities (1,761) (1,431) 4,283
Deferred income 1,766 (1,152) 608
Related party liabilities 928 310 9,737
Net cash provided by operating activities 99,755 91,757 87,133
Cash flow from investing activities:      
Escrow deposits 0 0 0
Purchase of:      
Property, plant and equipment 0 0 0
Short term investments (612) 0 0
Fixed maturities investments (297,062) (617,078) (587,410)
Equity Securities (1,651) (1,380) (962)
Preferred stock   (8,000) (16,144)
Real estate (977) (169) (622)
Mortgage loans (166,967) (134,115) (140,036)
Proceeds from sale and paydowns of:      
Property, plant and equipment 0 0 0
Short term investments 0 854 49
Fixed maturities investments 177,695 336,736 508,385
Equity Securities 6 2,026 207
Preferred stock   0 0
Real estate 3,066 0 0
Mortgage loans 144,805 102,584 11,866
Net cash used by investing activities (141,697) (318,542) (224,667)
Cash flow from financing activities:      
Borrowings from credit facilities 0 0 9,600
Principal repayments on credit facilities 0 (11,187) (9,860)
Debt issuance costs 0 0 0
Capital lease payments 0 0 0
Securitization deposits 0    
Voting Common stock dividends paid 0 0 0
Series N Non-Voting Common Stock Dividends 0    
Net contribution from (to) related party     (18,599)
Investment contract deposits 341,483 347,520 517,856
Investment contract withdrawals (334,659) (237,503) (213,864)
Net cash provided by financing activities 6,824 98,830 285,133
Effects of exchange rate on cash   0 0
Increase (decrease) cash and cash equivalents   (127,955) 147,599
Cash and cash equivalents at beginning of period 50,124 178,079 30,480
Cash and cash equivalents at the end of period   50,124 178,079
Eliminations [Member]      
Cash flow from operating activities:      
Net earnings (39,727) (54,746) (44,441)
Earnings from consolidated subsidiaries 39,727 54,746 44,441
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 0 0 0
Amortization of deferred policy acquisition costs 0 0 0
Amortization of premiums and accretion of discounts related to investments, inc 0 0 0
Amortization of debt issuance costs 0 0 0
Interest credited to policyholders 0 0 0
Change in allowance for losses on trade receivables 0 0 0
Change in allowance for inventory reserves 0 0 0
Net gains on disposal of personal property 0 0 0
Net gains on disposal of real estate 0 0 0
Net gains on sales of investments 0 0 0
Net (gains) losses on equity investments 0 0 0
Deferred income taxes 0 0 0
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 0 0 0
Inventories and parts 0 0 0
Prepaid expenses 0 0 0
Capitalization of deferred policy acquisition costs 0 0 0
Other assets 0 0 0
Related party assets 0 0 12,000
Accounts payable and accrued expenses 0 0 0
Policy benefits and losses, claims and loss expenses payable 0 0 0
Other policyholders' funds and liabilities 0 0 0
Deferred income 0 0 0
Related party liabilities 0 0 (12,000)
Net cash provided by operating activities 0 0 0
Cash flow from investing activities:      
Escrow deposits 0 0 0
Purchase of:      
Property, plant and equipment 3,066 0 0
Short term investments 0 0 0
Fixed maturities investments 0 0 0
Equity Securities 0 0 0
Preferred stock   0 0
Real estate 0 0 0
Mortgage loans 0 0 0
Proceeds from sale and paydowns of:      
Property, plant and equipment 0 0 0
Short term investments 0 0 0
Fixed maturities investments 0 0 0
Equity Securities 0 0 0
Preferred stock   0 0
Real estate (3,066) 0 0
Mortgage loans 0 0 0
Net cash used by investing activities 0 0 0
Cash flow from financing activities:      
Borrowings from credit facilities 0 0 0
Principal repayments on credit facilities 0 0 0
Debt issuance costs 0 0 0
Capital lease payments 0 0 0
Securitization deposits 0    
Voting Common stock dividends paid 0 0 0
Series N Non-Voting Common Stock Dividends 0    
Net contribution from (to) related party     0
Investment contract deposits 0 0 0
Investment contract withdrawals 0 0 0
Net cash provided by financing activities 0 0 0
Effects of exchange rate on cash 0 0 0
Increase (decrease) cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of period 0 0 0
Cash and cash equivalents at the end of period $ 0 $ 0 $ 0
v3.23.1
Revenue Recognition (Revenue Over Time) (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Contract With Customer Liability [Abstract]  
2022 $ 24,973
2023 12,378
2024 9,552
2025 7,680
2026 5,050
Thereafter 38,998
Self Moving Equipment  
Contract With Customer Liability [Abstract]  
2022 5,750
2023 0
2024 0
2025 0
2026 0
Thereafter 0
Property Lease Revenue  
Contract With Customer Liability [Abstract]  
2022 19,223
2023 12,378
2024 9,552
2025 7,680
2026 5,050
Thereafter $ 38,998
v3.23.1
Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Revenue From Contract With Customer [Abstract]      
Revenues recognized over time $ 320,822 $ 284,401 $ 182,278
Revenues recognized at point in time 425,584 414,985 396,600
Total revenues recognized under ASC 606 746,406 699,386 578,878
Revenues recognized under ASC 840 4,744,746 4,690,434 3,644,798
Revenues recognized under ASC 944 196,860 201,666 195,371
Revenues recognized under ASC 320 176,679 148,261 122,938
Total revenues $ 5,864,691 $ 5,739,747 $ 4,541,985
v3.23.1
Allowance for Credit Losses (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]      
Reinsurance paid percentage of total assets 1.00%    
Premiums Receivable Gross   $ 4.1 $ 1.7
Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]      
Modeling of mortgage loans Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at amortized cost.   Modeling for the Company’s mortgage loans is based on inputs most highly correlated to defaults, including loan-to-value, occupancy, and payment history.   Historical credit loss experience provides additional support for the estimation of expected credit losses. In assessing the credit losses, the portfolio is reviewed on a collective basis, using loan-specific cash flows to determine the fair value of the collateral in the event of default.   Adjustments to this analysis are made to assess loans with a loan-to-value of 65% or greater. These loans are evaluated on an individual basis and loan specific risk characteristics such as occupancy levels, expense, income growth and other relevant available information from internal and external sources relating to past events, current conditions, and reasonable and supportable forecasts.    
v3.23.1
Allowance for Credit Losses (Reserve Allowance Various Credit Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Valuation And Qualifying Accounts [Abstract]    
March 31, 2022 $ 9,210 $ 6,242
Transition adjustment expected credit loss current (2,803) 2,968
Write-offs against allowance 0 0
Recoveries 0 0
March 31, 2023 6,407 9,210
Trade Receivables    
Valuation And Qualifying Accounts [Abstract]    
March 31, 2022 8,649 4,421
Transition adjustment expected credit loss current (4,860) 4,228
Write-offs against allowance 0 0
Recoveries 0 0
March 31, 2023 3,789 8,649
Investments, Fixed Maturities    
Valuation And Qualifying Accounts [Abstract]    
March 31, 2022 60 1,320
Transition adjustment expected credit loss current 2,041 (1,260)
Write-offs against allowance 0 0
Recoveries 0 0
March 31, 2023 2,101 60
Investments, Other    
Valuation And Qualifying Accounts [Abstract]    
March 31, 2022 501 501
Transition adjustment expected credit loss current 16 0
Write-offs against allowance 0 0
Recoveries 0 0
March 31, 2023 $ 517 $ 501
v3.23.1
Schedule I - Condensed Financial Information of U-Haul Holding Company (Narratives) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Income Taxes Paid, Net [Abstract]      
Income taxes paid (net of income tax refunds) $ 145,680 $ (4,548) $ 29,044
v3.23.1
Schedule I - Condensed Financial Information of U-Haul Holding Company (Balance Sheets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
ASSETS:      
Cash and cash equivalents $ 2,060,524 $ 2,704,137  
Investments in subsidiaries 0 0  
Related party assets 48,308 47,851  
Total assets 18,124,648 17,299,581 $ 14,651,606
Liabilities:      
Other Liabilities 11,596,313 11,347,089  
Stockholders' equity:      
Additional paid-in capital 453,643 453,819  
Accumulated other comprehensive loss (267,046) 46,384  
Consolidated statement of change in equity      
Beginning of period 6,119,442    
Net earnings 922,998 1,123,286 610,856
Series N Non-Voting Common Stock Dividends (14,117) 0 0
End of period 7,008,715 6,119,442  
Total stockholders' equity 6,528,335 5,952,492  
Total liabilities and stockholders' equity 18,124,648 17,299,581  
Nonvoting Common Stock [Member]      
Stockholders' equity:      
Common stock 176 0  
Consolidated statement of change in equity      
Net earnings 0 0 0
Series N Non-Voting Common Stock Dividends 0    
Common Stock in Treasury [Member]      
Consolidated statement of change in equity      
Cost of shares in treasury (525,653) (525,653)  
Preferred Stock in Treasury [Member]      
Consolidated statement of change in equity      
Cost of shares in treasury (151,997) (151,997)  
U-Haul Holding Company [Member]      
ASSETS:      
Cash and cash equivalents 1,662,790 2,085,447  
Investments in subsidiaries 4,575,886 4,308,020  
Related party assets 2,482,280 1,842,445  
Other assets 403,191 178,691  
Total assets 9,124,147 8,414,603  
Liabilities:      
Other Liabilities 2,601,631 2,463,308  
Stockholders' equity:      
Preferred stock 0 0  
Common stock 10,497 10,497  
Additional paid-in capital 453,853 454,029  
Accumulated other comprehensive loss (272,865) 45,187  
Consolidated statement of change in equity      
Beginning of period 6,119,232 5,025,358  
Net earnings 922,998 1,123,286 610,856
Dividends (19,608) (29,412)  
Series N Non-Voting Common Stock Dividends (14,117) 0  
End of period 7,008,505 6,119,232 $ 5,025,358
Total stockholders' equity 6,522,516 5,951,295  
Total liabilities and stockholders' equity 9,124,147 8,414,603  
U-Haul Holding Company [Member] | Nonvoting Common Stock [Member]      
Stockholders' equity:      
Common stock 176 0  
U-Haul Holding Company [Member] | Common Stock in Treasury [Member]      
Consolidated statement of change in equity      
Cost of shares in treasury (525,653) (525,653)  
U-Haul Holding Company [Member] | Preferred Stock in Treasury [Member]      
Consolidated statement of change in equity      
Cost of shares in treasury $ (151,997) $ (151,997)  
v3.23.1
Schedule I - Condensed Financial Information of U-Haul Holding Company (Statements of Operations) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Revenues:      
Net interest income from subs $ 5,864,691 $ 5,739,747 $ 4,541,985
Expenses:      
Operating expenses 3,024,547 2,676,541 2,187,684
Total costs and expenses 4,420,585 4,094,750 3,580,838
Equity in earnings of subsidiaries 0 0 0
Pretax earnings 1,217,923 1,475,497 796,658
Income tax expense (294,925) (352,211) (185,802)
Net earnings available to common shareholders 922,998 1,123,286 610,856
U-Haul Holding Company [Member]      
Revenues:      
Net interest income from subs 54,823 1,516 720
Expenses:      
Operating expenses 13,937 5,517 6,753
Other expenses 127 115 115
Total costs and expenses 14,064 5,632 6,868
Equity in earnings of subsidiaries 581,043 1,011,841 508,632
Interest income 413,170 131,400 135,673
Pretax earnings 1,034,972 1,139,125 638,157
Income tax expense (111,974) (15,839) (27,301)
Net earnings available to common shareholders $ 922,998 $ 1,123,286 $ 610,856
Basic and diluted earnings per common share $ 5.54 $ 5.58 $ 2.87
Weighted average common shares outstanding: basic and diluted 176,470,092 176,470,092 176,470,092
v3.23.1
Schedule I - Condensed Financial Information of U-Haul Holding Company (Statements of Comprehensive Income) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Net earnings $ 922,998 $ 1,123,286 $ 610,856
U-Haul Holding Company [Member]      
Net earnings 922,998 1,123,286 610,856
Other comprehensive income (loss) (318,052) (57,381) 67,468
Total comprehensive income $ 604,946 $ 1,065,905 $ 678,324
v3.23.1
Schedule I - Condensed Financial Information of U-Haul Holding Company (Statements of Cash Flow) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Cash flow from operating activities:      
Net earnings $ 922,998 $ 1,123,286 $ 610,856
Earnings from consolidated subsidiaries 0 0 0
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 733,879 696,955 664,001
Net loss on sales of investments 8,300 (11,872) (10,058)
Deferred income taxes 131,754 101,091 68,411
Net change in other operating assets and liabilities:      
Reinsurance recoverables and trade receivables 44,714 (9,187) (39,516)
Prepaid expenses (5,575) 232,342 94,359
Other assets 16,027 15,349 44,251
Related party assets (544) (10,357) (487)
Accounts payable and accrued expenses 34,263 10,514 78,718
Net cash provided by operating activities 1,729,610 1,946,235 1,535,395
Cash flow from investing activities:      
Purchases of property, plant and equipment (2,723,901) (2,136,537) (1,441,475)
Net cash used by investing activities (2,421,385) (1,867,176) (1,129,529)
Cash flow from financing activities:      
Borrowings from credit facilities 1,017,898 1,969,474 922,008
Principal repayments on credit facilities (801,994) (437,506) (662,588)
Debt issuance costs (5,237) (13,156) (5,793)
Voting Common stock dividends paid (19,608) (29,412) (49,019)
Net contribution from (to) related party     0
Net Cash Provided by (Used in) Financing Activities 59,795 1,433,155 287,353
Effects of exchange rate on cash (11,633) (2,089) 6,441
Increase (decrease) cash and cash equivalents (643,613) 1,510,125 699,660
Cash and cash equivalents at beginning of period 2,704,137 1,194,012 494,352
Cash and cash equivalents at the end of period 2,060,524 2,704,137 1,194,012
U-Haul Holding Company [Member]      
Cash flow from operating activities:      
Net earnings 922,998 1,123,286 610,856
Earnings from consolidated subsidiaries (581,043) (1,011,841) (508,632)
Adjustments to reconcile net earnings to cash provided by operations:      
Depreciation 3 1 1
Net loss on sales of investments 859 292 924
Deferred income taxes 137,159 106,869 72,407
Net change in other operating assets and liabilities:      
Prepaid expenses 6,120 234,490 88,898
Other assets (2,884) (4) 0
Related party assets (120) (240) (12,000)
Accounts payable and accrued expenses (2,499) 5,461 (4,019)
Net cash provided by operating activities 480,593 458,314 248,435
Cash flow from investing activities:      
Purchases of property, plant and equipment (1) (11) (3)
Net cash used by investing activities (225,000) (11) (3)
Cash flow from financing activities:      
Borrowings from credit facilities 0 1,200,000 200,000
Principal repayments on credit facilities 0 0 (200,000)
Debt issuance costs 0 (8,468) (924)
Proceeds from (repayments) of intercompany loans (637,585) (284,438) 211,064
Voting Common stock dividends paid (19,608) (29,412) (49,019)
Net contribution from (to) related party 0 0 41,199
Net Cash Provided by (Used in) Financing Activities (671,310) 877,682 202,320
Effects of exchange rate on cash (6,940) (1,591) 5,773
Increase (decrease) cash and cash equivalents (422,657) 1,334,394 456,525
Cash and cash equivalents at beginning of period 2,085,447 751,053 294,528
Cash and cash equivalents at the end of period $ 1,662,790 $ 2,085,447 $ 751,053
v3.23.1
Schedule II - U-Haul Holding Company and Consolidated Subsidiaries, Valuation and Qualifying Accounts (Details) - U-Haul Holding Company [Member] - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Allowance for doubtful accounts (deducted from trade receivable) [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year   $ 4,421 $ 535
Additions charged to cost and expenses     2,179
Additions charged to other accounts     2,680
Deductions     (973)
Balance at year end     4,421
Allowance for obsolescence (deducted from inventory) [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 1,080 1,416 3,063
Additions charged to cost and expenses 0 0 0
Additions charged to other accounts 0 0 0
Deductions (151) (336) (1,647)
Balance at year end 929 1,080 1,416
Allowance for LIFO (deducted from inventory) [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 37,400 21,832 18,886
Additions charged to cost and expenses 9,665 15,568 2,946
Additions charged to other accounts 0 0 0
Deductions 0 0 0
Balance at year end $ 47,065 37,400 21,832
Allowance for probable losses (deducted from mortgage loans) [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year   $ 448 493
Additions charged to cost and expenses     0
Additions charged to other accounts     0
Deductions     (45)
Balance at year end     $ 448
v3.23.1
Schedule V - U-Haul Holding Company and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations) (Details) - Property Casualty Insurance Operations [Member] - U-Haul Holding Company [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Supplemental Information For Property And Casualty Insurance Underwriters [Abstract]      
Deferred policy acquisition costs $ 0 $ 0 $ 0
Reserves for unpaid claims and claims adjustment expense 151,874 159,162 177,963
Discount if any, deducted 0 0 0
Unearned premiums (97) 334 (294)
Net earned premiums (1) 96,242 89,667 70,285
Net investment income (2) 7,314 24,385 16,335
Claim and claim adjustment expenses incurred related to current year 27,570 28,980 20,670
Prior years (5,828) (6,290) (3,865)
Amortization of deferred policy acquisition costs 0 0 0
Paid claims and claim adjustment expense 22,965 24,012 25,759
Net premiums written (1) $ 96,145 $ 90,002 $ 69,989
v3.23.1
Schedule V - U-Haul Holding Company and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations), Parenthetical (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Investment Income, Net [Abstract]      
Premiums Earned, Net $ 195,391 $ 200,694 $ 191,894