AMERCO /NV/, 10-Q filed on 09 Feb 22
 | XBRL Documents
v3.22.0.1
Document and Entity Information - shares
 3 Months Ended
Dec. 31, 2021
Feb. 04, 2022
Document and Entity Information [Abstract]    
Entity Registrant Name AMERCO  
Entity Central Index Key 0000004457  
Entity Current Reporting Status Yes  
Entity Small Business false  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Document Fiscal Year Focus 2022  
Trading Symbol UHAL  
Document Type 10-Q  
Document Fiscal Period Focus Q3  
Document Period End Date Dec. 31, 2021  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   19,607,788
Entity Shell Company false  
Entity Interactive Data Current Yes  
Entity File Number 001-11255  
Entity Tax Identification Number 88-0106815  
Entity address, address line one 5555 Kietzke Lane  
Entity address, address line two Suite 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 Incorporation, State or Country Code NV  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
v3.22.0.1
Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
ASSETS:    
Cash and cash equivalents $ 2,327,462 $ 1,194,012
Reinsurance recoverables and trade receivables, net 230,437 224,426
Inventories, net 166,588 105,577
Prepaid expenses 211,449 469,144
Investments, fixed maturities and marketable equities 2,795,442 2,695,656
Investments, other 602,371 489,759
Deferred policy acquisition costs, net 101,770 89,749
Other assets 41,146 47,730
Right of use Assets - Financing 692,814 877,038
Right of use Assets - Operating 79,450 92,505
Related party assets 56,231 35,395
Subtotal assets 7,305,160 6,320,991
Property, plant and equipment, at cost:    
Land 1,264,742 1,075,813
Buildings and improvements 5,726,481 5,163,705
Furniture and equipment 841,957 786,505
Property, plant and equipment (gross) 12,827,443 11,413,668
Less: Accumulated depreciation (3,544,525) (3,083,053)
Total property, plant and equipment 9,282,918 8,330,615
Total assets 16,588,078 14,651,606
Liabilities:    
Accounts payable and accrued expenses 634,795 645,575
Notes, loans and leases payable 5,397,856 4,668,907
Financing lease liability 384,505  
Operating lease liability 79,334 92,510
Policy benefits and losses, claims and loss expenses payable 1,003,895 997,701
Liabilities from investment contracts 2,302,591 2,161,530
Other policyholders' funds and liabilities 9,610 12,420
Deferred income 43,352 42,592
Deferred income taxes, net 1,301,229 1,178,489
Total liabilities 10,772,662 9,799,724
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:    
Additional paid-in capital 453,819 453,819
Accumulated other comprehensive loss 63,264 106,857
Retained earnings 5,965,486 4,958,359
Total stockholders' equity 5,815,416 4,851,882
Total liabilities and stockholders' equity 16,588,078 14,651,606
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
Serial 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)
Rental Trailers and Other Rental Equipment [Member]    
Property, plant and equipment, at cost:    
Property subject to or available for operating lease, gross 569,150 477,921
Rental Trucks [Member]    
Property, plant and equipment, at cost:    
Property subject to or available for operating lease, gross $ 4,425,113 $ 3,909,724
v3.22.0.1
Condensed Consolidated Balance Sheets Parenthetical
Dec. 31, 2021
$ / shares
shares
Series Preferred Stock With or Without Par Value [Member]  
Preferred stock:  
Preferred stock, shares authorized 50,000,000
Series A Preferred Stock [Member]  
Preferred stock:  
Preferred stock, shares authorized 6,100,000
Preferred stock, shares issued 6,100,000
Series B Preferred Stock [Member]  
Preferred stock:  
Preferred stock, shares authorized 100,000
Serial Common Stock With or Without Par Value [Member]  
Common stock:  
Common stock, shares authorized 250,000,000
Serial Common Stock [Member]  
Common stock:  
Common stock, shares authorized 10,000,000
Common stock, par or stated value per share | $ / shares $ 0.25
Common Stock [Member]  
Common stock:  
Common stock, shares authorized 250,000,000
Common stock, par or stated value per share | $ / shares $ 0.25
Amerco Common Stock [Member]  
Common stock:  
Common stock, shares authorized 250,000,000
Common stock, shares, issued 41,985,700
Common stock, shares, outstanding 19,607,788
Common stock, par or stated value per share | $ / shares $ 0.25
Common Stock in Treasury [Member]  
Treasury stock:  
Treasury stock, shares 22,377,912
Preferred Stock in Treasury [Member]  
Treasury stock:  
Treasury stock, shares 6,100,000
v3.22.0.1
Condensed Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Revenues:        
Self-moving equipment rentals $ 975,552 $ 808,215 $ 3,189,990 $ 2,393,530
Self-storage revenues 159,424 123,024 450,302 347,252
Self moving and self-storage products and service sales 75,402 74,586 272,478 264,564
Property management fees 9,651 8,765 26,847 23,952
Life insurance premiums 27,010 29,993 84,628 91,958
Property and casualty insurance premiums 25,618 19,933 64,986 49,536
Net investment and interest income 31,184 35,580 102,963 85,895
Other revenue 100,495 69,886 349,252 225,440
Total revenues 1,404,336 1,169,982 4,541,446 3,482,127
Costs and expenses:        
Operating expenses 658,095 539,942 1,968,698 1,606,687
Commission expenses 105,155 86,891 346,200 255,431
Cost of sales 57,042 45,752 193,448 159,516
Benefits and losses 47,266 45,631 139,194 130,660
Amortization of deferred policy acquisition costs 7,947 6,572 23,520 19,012
Lease expense 7,394 7,522 22,482 20,995
Depreciation, net of (gains) losses on disposals 103,736 152,602 361,201 455,711
Net (gains) losses on disposal of real estate 977 1,124 (2,930) 4,293
Total costs and expenses 987,612 886,036 3,051,813 2,652,305
Earnings from operations 416,724 283,946 1,489,633 829,822
Other components of net periodic benefit costs (280) (247) (840) (740)
Interest expense (44,042) (42,128) (122,765) (122,174)
Fees on early extinguishment of debt (956) 0 (956) 0
Pretax earnings 371,446 241,571 1,365,072 706,908
Income tax expense (89,980) (58,586) (328,533) (169,832)
Earnings available to common stockholders $ 281,466 $ 182,985 $ 1,036,539 $ 537,076
Basic and diluted earnings per common share $ 14.35 $ 9.33 $ 52.86 $ 27.39
Weighted average common shares outstanding: basic and diluted 19,607,788 19,607,788 19,607,788 19,607,788
v3.22.0.1
Condensed Consolidated Statements of Operations Parenthetical - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Depreciation:        
Net gain on sale of real and personal property     $ (157,980) $ (40,083)
Related party:        
Related party revenues, net of eliminations $ 9,651 $ 8,765 26,847 23,952
Related party, costs and expenses, net of eliminations $ 21,690 $ 18,757 $ 72,343 $ 55,937
v3.22.0.1
Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Comprehensive income (loss) (pretax):        
Pretax earnings (loss) $ 371,446 $ 241,571 $ 1,365,072 $ 706,908
Comprehensive income (loss) (tax effect):        
Income tax expense (89,980) (58,586) (328,533) (169,832)
Comprehensive income (loss) (net of tax):        
Net earnings 281,466 182,985 1,036,539 537,076
Other comprehensive income (loss):        
Foreign currency translation (pretax) 112 (2,566) (2,288) (5,193)
Foreign currency translation (tax effect) 0 0 0 0
Foreign currency translation (net of tax) 112 (2,566) (2,288) (5,193)
Unrealized gain (loss) on investments (pretax) (15,187) 12,074 (55,113) 68,298
Unrealized gain (loss) on investments (tax effect) 3,195 (2,514) 11,476 (13,398)
Unrealized gain (loss) on investments (net of tax) (11,992) 9,560 (43,637) 54,900
Change in fair value of cash flow hedges (pretax) 235 35 93 (624)
Change in fair value of cash flow hedges (tax effect) (57) (9) (22) 153
Change in fair value of cash flow hedges (net of tax) 178 26 71 (471)
Amounts reclassified into earnings on hedging activities, (pre tax) 1,007 972 2,997 2,680
Amounts reclassified into earnings on hedging activities (tax effect) (248) (238) (736) (658)
Amounts reclassified into earnings on hedging activities (net of tax) 759 734 2,261 2,022
Total other comprehensive income (loss) (pretax) (13,833) 10,515 (54,311) 65,161
Total other comprehensive income (loss) (tax effect) 2,890 (2,761) 10,718 (13,903)
Total other comprehensive income (loss), (net of tax) (10,943) 7,754 (43,593) 51,258
Total comprehensive income (pretax) 357,613 252,086 1,310,761 772,069
Total comprehensive income (tax effect) (87,090) (61,347) (317,815) (183,735)
Total comprehensive income (loss) (net of tax) $ 270,523 $ 190,739 $ 992,946 $ 588,334
v3.22.0.1
Condensed 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]
Less: Unearned Employee Stock Ownership Plan Shares [Member]
Balance, beginning of period at Mar. 31, 2020 $ 4,220,720 $ 10,497 $ 453,819 $ 34,652 $ 4,399,402 $ (525,653) $ (151,997)  
Cosolidated statement of change in equity                
Purchase of ESOP shares (2,880) 0 0 0 (2,880) 0 0  
Foreign currency translation (5,193) 0 0 (5,193) 0 0 0  
Unrealized net gain (loss) on investments, net of tax 54,900 0 0 54,900 0 0 0  
Change in fair value of cash flow hedges, net of tax (471) 0 0 (471) 0 0 0  
Amounts reclassified into earnings on hedging activities, net 2,022 0 0 2,022 0 0 0  
Net earnings 537,076 0 0 0 537,076 0 0  
Common stock dividends (49,019) 0 0 0 (49,019) 0 0  
Net activity 536,435 0 0 51,258 485,177 0 0  
Balance, end of period at Dec. 31, 2020 4,757,155 10,497 453,819 85,910 4,884,579 (525,653) (151,997)  
Balance, beginning of period at Sep. 30, 2020 4,605,631 10,497 453,819 78,156 4,740,809 (525,653) (151,997)  
Cosolidated statement of change in equity                
Foreign currency translation (2,566) 0 0 (2,566) 0 0 0  
Unrealized net gain (loss) on investments, net of tax 9,560 0 0 9,560 0 0 0  
Change in fair value of cash flow hedges, net of tax 26 0 0 26 0 0 0  
Amounts reclassified into earnings on hedging activities, net 734 0 0 734 0 0 0  
Net earnings 182,985 0 0 0 182,985 0 0  
Common stock dividends (39,215) 0 0 0 (39,215) 0 0  
Net activity 151,524 0 0 7,754 143,770 0 0  
Balance, end of period at Dec. 31, 2020 4,757,155 10,497 453,819 85,910 4,884,579 (525,653) (151,997)  
Balance, beginning of period at Mar. 31, 2021 4,851,882 10,497 453,819 106,857 4,958,359 (525,653) (151,997)  
Cosolidated statement of change in equity                
Foreign currency translation (2,288) 0 0 (2,288) 0 0 0 $ 0
Unrealized net gain (loss) on investments, net of tax (43,637) 0 0 (43,637) 0 0 0 0
Change in fair value of cash flow hedges, net of tax 71 0 0 71 0 0 0 0
Amounts reclassified into earnings on hedging activities, net 2,261 0 0 2,261 0 0 0 $ 0
Net earnings 1,036,539 0 0 0 1,036,539 0 0  
Common stock dividends (29,412) 0 0 0 (29,412) 0 0  
Net activity 963,534 0 0 (43,593) 1,007,127 0 0  
Balance, end of period at Dec. 31, 2021 5,815,416 10,497 453,819 63,264 5,965,486 (525,653) (151,997)  
Balance, beginning of period at Sep. 30, 2021 5,554,697 10,497 453,819 74,207 5,693,824 (525,653) (151,997)  
Cosolidated statement of change in equity                
Foreign currency translation 112 0 0 112 0 0 0  
Unrealized net gain (loss) on investments, net of tax (11,992) 0 0 (11,992) 0 0 0  
Change in fair value of cash flow hedges, net of tax 178 0 0 178 0 0 0  
Amounts reclassified into earnings on hedging activities, net 759 0 0 759 0 0 0  
Net earnings 281,466 0 0 0 281,466 0 0  
Common stock dividends (9,804) 0 0 0 (9,804) 0 0  
Net activity 260,719 0 0 (10,943) 271,662 0 0  
Balance, end of period at Dec. 31, 2021 $ 5,815,416 $ 10,497 $ 453,819 $ 63,264 $ 5,965,486 $ (525,653) $ (151,997)  
v3.22.0.1
Condensed Consolidated Statements of Changes in Stockholders' Equity Parenthetical - $ / shares
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Common Stock, Dividends, Per Share, Declared $ 0.50 $ 2.00 $ 1.50 $ 2.50
v3.22.0.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flow from operating activities:    
Net earnings $ 1,036,539 $ 537,076
Adjustments to reconcile net earnings to cash provided by operations:    
Depreciation 519,181 495,794
Amortization of deferred policy acquisition costs 23,520 19,012
Amortization of premiums and accretion of discounts related to investments, net 14,486 10,197
Amortization of debt issuance costs 4,200 4,645
Interest credited to policyholders 47,181 38,672
Change in allowance for losses on trade receivables 1,243 (574)
Change in allowance for inventory reserves 9,799 3,259
Net gain on sale of real and personal property (157,980) (40,083)
Net losses on disposal of real estate (2,930) 4,293
Net (gain) loss on sale of investments (3,495) (5,644)
Net losses on equity investments (3,695) 669
Deferred income tax 130,760 117,025
Net change in other operating assets and liabilities:    
Reinsurance recoverables and trade receivables (7,371) (39,499)
Inventories (70,796) (6,349)
Prepaid expenses 257,591 112,428
Capitalization of deferred policy acquisition costs (25,703) (24,903)
Other assets 1,178 30,120
Related party assets (18,683) (20,794)
Accounts payable and accrued expenses 33,258 97,151
Policy benefits and losses, claims and loss expenses payable 6,411 14,096
Other policyholders' funds and liabilities (2,810) 24,677
Deferred income (526) 6,851
Related party liabilities (2,207) (1,566)
Net cash provided by operating activities 1,789,151 1,376,553
Cash flow from investing activities:    
Escrow deposits 5,695 (1,978)
Purchase of:    
Property, plant and equipment (1,652,984) (961,995)
Short term investments (31,074) (38,790)
Fixed maturity investments (448,283) (352,307)
Equity securities (1,380) (838)
Preferred stock (8,000) (16,144)
Real estate (190) (274)
Mortgage loans (131,633) (92,281)
Proceeds from sale of:    
Property, plant and equipment 483,783 434,860
Short term investments 20,669 38,830
Fixed maturity investments 284,347 331,407
Equity securities 2,026 72
Preferred stock 2,000 1,200
Mortgage loans 28,064 4,744
Net cash used by investing activities (1,446,960) (653,494)
Cash flow from financing activities:    
Borrowings from credit facilities 1,202,412 790,532
Principal repayments on credit facilities (333,419) (568,068)
Payment of debt issuance costs (8,006) (5,020)
Capital lease payments (129,150) (173,520)
Securitization deposits   (49,019)
Common stock dividends paid (29,412) (49,019)
Net contribution from (to) related party 0 22,600
Investment contract deposits 271,657 326,055
Investment contract withdrawals (177,777) (169,008)
Net cash provided by (used in) financing activities 796,305 174,552
Effects of exchange rate on cash (5,046) 6,877
Increase (decrease) in cash and cash equivalents 1,133,450 904,488
Cash and cash equivalents at the beginning of period 1,194,012 494,352
Cash and cash equivalents at the end of the period $ 2,327,462 $ 1,398,840
v3.22.0.1
Basis of Presentation
 9 Months Ended
Dec. 31, 2021
Disclosure Text Block [Abstract]  
1. Basis of Presentation AMERCO, a Nevada corporation (“AMERCO”), has a third fiscal quarter that ends on the 31st of December for each year that is referenced. Our insurance company subsidiaries have a third quarter that ends on the 30 th of September 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 presentation of 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 2021 and 2020 correspond to fiscal 2022 and 2021 for AMERCO. Accounts denominated in non-U.S. currencies have been translated into U.S. dollars.   The condensed consolidated balance sheet as of December 31, 2021 and the related condensed consolidated statements of operations, comprehensive income (loss), stockholders’ equity for the third quarter and first nine months of fiscal 2022 and 2021 and cash flows for the first nine months of fiscal 2022 and 2021 are unaudited. In our opinion, all adjustments necessary for the fair presentation of such condensed consolidated financial statements have been included. Such adjustments consist only of normal recurring items. Interim results are not necessarily indicative of results for a full year. The information in this Quarterly Report on Form 10-Q (“Quarterly Report”) should be read in conjunction with the financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended March 31, 2021. Intercompany accounts and transactions have been eliminated. Description of Legal Entities AMERCO 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 AMERCO and all of its legal subsidiaries. Description of Operating Segments AMERCO has three ( 3 ) reportable segments. They are Moving and Storage, Property and Casualty Insurance and Life Insurance. The Moving and Storage operating segment (“Moving and Storage”) includes AMERCO, 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. The Property and Casualty Insurance operating segment (“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 insurance 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. The Life Insurance operating segment (“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.
v3.22.0.1
Earnings Per Share
 9 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
2. Earnings Per Share Our earnings per share is calculated by dividing our earnings available to common stockholders by the weighted average common shares outstanding, basic and diluted.
v3.22.0.1
Investments
 9 Months Ended
Dec. 31, 2021
Investments Debt Equity Securities [Abstract]  
3. Investments 3. Investments Expected maturities may differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. We deposit bonds with insurance regulatory authorities to meet statutory requirements. The adjusted cost of bonds on deposit with insurance regulatory authorities was $ 26.6 million and $ 27.7 million as of December 31, 2021 and March 31, 2021, respectively. Available-for-Sale Investments Available-for-sale investments as of December 31, 2021 were as follows:     Cost Amortized   Unrealized Gains Gross   Unrealized Losses More than 12 Months Gross   Unrealized Losses Less than 12 Months Gross   Allowance for Expected Credit Losses   Market Value Estimated     (Unaudited)     (In thousands) U.S. treasury securities and government obligations $ 118,140 $   9,039 $   – $   (678) $   – $   126,501 U.S. government agency mortgage-backed securities   57,083   370   –   (2,439)   –   55,014 Obligations of states and political subdivisions   191,141   16,734   (80)   (474)   –   207,321 Corporate securities   2,029,477   157,250   (26)   (5,818)   –   2,180,883 Mortgage-backed securities   163,430   10,003   (1)   –   –   173,432   $ 2,559,271 $   193,396 $   ( 107 ) $   ( 9,409 ) $   – $   2,743,151   Available-for-sale investments as of March 31, 2021 were as follows:     Cost Amortized   Unrealized Gains Gross   Unrealized Losses More than 12 Months Gross   Unrealized Losses Less than 12 Months Gross   Allowance for Expected Credit Losses   Market Value Estimated           (In thousands) U.S. treasury securities and government obligations $ 92,429 $   12,941 $   – $   – $   – $   105,370 U.S. government agency mortgage-backed securities   61,427   911   (1)   (132)   –   62,205 Obligations of states and political subdivisions   230,521   25,249   (59)   (3)   –   255,708 Corporate securities   1,846,507   199,447   (163)   (641)   (1,319)   2,043,831 Mortgage-backed securities   174,728   11,706   (1)   (8)   –   186,425   $ 2,405,612 $   250,254 $   ( 224 ) $   ( 784 ) $   ( 1,319 ) $   2,653,539   We sold available-for-sale securities with a fair value of $278.8 million during the first nine months of fiscal 2022. The gross realized gains on these sales totaled $4.7 million. The gross realized losses on these sales totaled $3.0 million. 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 allowance for credit losses are recorded as provision for (or reversal of) credit loss expense. There were no incremental impairment charges recorded during the first nine months as of December 31, 2021. The adjusted cost and estimated market value of available-for-sale investments by contractual maturity were as follows:     December 31, 2021   March 31, 2021     Cost Amortized   Market Value Estimated   Cost Amortized   Market Value Estimated     (Unaudited)         (In thousands) Due in one year or less $ 69,891 $ 71,172 $ 90,142 $ 91,190 Due after one year through five years   572,812   609,255   562,442   601,818 Due after five years through ten years   677,891   745,523   672,733   754,536 Due after ten years   1,075,247   1,143,769   905,567   1,019,570     2,395,841   2,569,719   2,230,884   2,467,114                   Mortgage-backed securities   163,430   173,432   174,728   186,425   $ 2,559,271 $ 2,743,151 $ 2,405,612 $ 2,653,539 As of December 31, 2021 and March 31, 2021, our common stock and non-redeemable preferred stock that are included in Investments, fixed maturities and marketable equities on our balance sheet are stated in the table below. The changes in the fair value of these equity investments are recognized through Net investment and interest income. Equity investments of common stock and non-redeemable preferred stock were as follows:     December 31, 2021   March 31, 2021     Amortized   Estimated   Amortized   Estimated     (Unaudited)             (In thousands)                   Common stocks $ 9,775 $ 24,179 $ 9,775 $ 20,440 Non-redeemable preferred stocks   26,054   28,112   20,034   21,677   $ 35,829 $ 52,291 $ 29,809 $ 42,117
v3.22.0.1
Borrowings
 9 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
4. Borrowings 4. Borrowings Long-Term Debt Long-term debt was as follows:                         December 31,   March 31,   2022 Rates     Maturities   2021   2021                 (Unaudited)                     (In thousands) Real estate loan (amortizing term)       1.61 %       2023 $ 51,925 $   82,913 Senior mortgages 2.70 % - 5.50 %   2022 - 2042   2,199,110   2,125,324 Real estate loans (revolving credit) (a) 1.34 % - 3.14 %   2023 - 2025   535,000   535,000 Fleet loans (amortizing term) 1.61 % - 4.66 %   2022 - 2028   136,790   176,295 Fleet loans (revolving credit) 1.25 %   2.36 %   2024 - 2026   550,000   535,000 Finance leases (rental equipment) 1.92 % - 5.04 %   2022 - 2026   384,505   513,623 Finance liability (rental equipment) 1.60 % - 4.22 %   2024 - 2029   886,254   644,375 Private placements 2.43 %   2.78 %   2029 - 2033   600,000   – Other obligations 1.50 % - 8.00 %   2022 - 2049   87,777   86,085 Notes, loans and finance leases payable                   5,431,361   4,698,615 Less: Debt issuance costs                     (33,505)   (29,708) Total notes, loans and finance leases payable, net         $ 5,397,856 $   4,668,907                             (a) Certain loans have interest rate swaps fixing the rate between 3.03% and 3.14% based on current margins.         Real Estate Backed Loans Real Estate Loan Real Estate and certain of its subsidiaries and U-Haul Company of Florida are borrowers under a real estate loan (the “Real Estate Loan”).   The Real Estate Loan requires monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. The Real Estate Loan is secured by various properties owned by the borrowers.   The interest rate, per the provisions of the amended loan agreement, is the applicable London Inter-Bank Offer Rate (“LIBOR”) plus the applicable margin. As of December 31, 2021, the applicable LIBOR was 0.11% and the applicable margin was 1.50 %, the sum of which was 1.61 %. The default provisions of the Real Estate Loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. There are limited restrictions regarding our use of the funds. 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 December 31, 2021 was 4.06%.  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. There are limited restrictions regarding our use of the funds. Real Estate Loans (Revolving Credit) Various subsidiaries of Real Estate are borrowers under asset-backed real estate loans with an aggregate borrowing capacity of $ 385.0 million. As of December 31, 2021, the outstanding balance of these loans in the aggregate was $ 385.0 million. These loans are secured by certain properties owned by the borrowers. The loan agreements provide for term loans, subject to the terms of the loan agreements. The loans require monthly interest payments with the unpaid loan balance and accrued and unpaid interest due at maturity. The interest rate, per the provision of the loan agreements, is the applicable LIBOR plus the applicable margin. As of December 31, 2021, the applicable LIBOR was between 0.09% and 0.10% and the margin was between 1.25 % and 1.50 %, the sum of which was between 1.34 % and 1.59 %. AMERCO is the guarantor of these loans. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. AMERCO is a borrower under a real estate loan. The current maximum credit commitment is $ 200.0 million, which can be increased to $ 300.0 million by bringing in other lenders. As of December 31, 2021, the outstanding balance was $ 150.0 million. 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. As of December 31, 2021, the applicable LIBOR was 0.09 % and the margin was 1.38 %, the sum of which was 1.47 %. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. There is a 0.30 % fee charged for unused capacity. 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 4.66 %.   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%. AMERCO, 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. Rental Truck Revolvers Various subsidiaries of U-Haul entered into three revolving fleet loans with an aggregate borrowing capacity of $ 590.0 million. The outstanding balance for these revolvers is $ 550.0 million. The interest rates, per the provision of the loan agreements, in aggregate of $ 375.0 million, are the applicable LIBOR plus the applicable margin. As of December 31, 2021, the applicable LIBOR was between 0.09 % and 0.10 % and the margin was between 1.15 % and 1.25 %, the sum of which was between 1.25 % and 1.34 %. Of this $375.0 million outstanding, $100.0 million is fixed with an interest rate of 2.36%.   The other loan of $175.0 million uses the Secured Overnight Funding Rate which interest rate was 0.05% plus a margin of 1.25% totaling 1.30% as of December 31, 2021.   Only interest is paid on the loans until the last nine months of the respective loan terms when principal becomes due monthly. 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 1.92% to 5.04%.  All of our finance leases are collateralized by our rental fleet. The net book value of the corresponding rental equipment was $692.8 million and $877.0 million as of December 31, 2021 and March 31, 2021, respectively. There were no new financing leases, as assessed under the new leasing guidance, entered into during the nine months ended December 31, 2021. Finance Liabilities Finance liabilities represent our rental equipment financing transactions and we assess if 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, 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 4.22 %. These finance liabilities are collateralized by our rental fleet.   Private Placements In September 2021, AMERCO 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 %.   Interest is payable semiannually.   In December 2021, AMERCO entered into a note purchase agreement to issue $ 600.0 million of fixed rate senior unsecured notes in a private placement offering. These notes funded on January 27, 2022. 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.   Other Obligations In February 2011, AMERCO and U.S. Bank, NA (the “Trustee”) entered into the U-Haul Investors Club ® Indenture.   AMERCO 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, 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 December 31, 2021, the aggregate outstanding principal balance of the U-Notes ® issued was $ 90.1 million, of which $ 2.3 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 2022 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 September 30, 2021, the deposits had an aggregate balance of $ 60.0 million, for which Oxford pays fixed interest rates between 0.49 % and 1.72 % with maturities between September 30, 2022 and September 29, 2025. As of September 30, 2021, available-for-sale investments held with the FHLB totaled $ 110.0 million, of which $ 66.5 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, as of December 31, 2021 for the next five years and thereafter are as follows:     Year Ending December 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands) Notes, loans and finance leases payable, secured $ 515,591 $ 611,940 $ 1,084,053 $ 539,695 $ 661,676 $ 2,018,406 Interest on Borrowings Interest Expense Components of interest expense include the following:     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) Interest expense $ 43,850 $ 41,371 Capitalized interest   (2,222)   (2,105) Amortization of transaction costs   1,407   1,890 Interest expense resulting from cash flow hedges   1,007   972 Total interest expense   44,042   42,128 Fees on early extinguishment of debt   956   – Total $ 44,998 $ 42,128       Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) Interest expense $ 122,589 $ 124,882 Capitalized interest   (6,974)   (10,033) Amortization of transaction costs   4,153   4,645 Interest expense resulting from cash flow hedges   2,997   2,680 Total interest expense   122,765   122,174 Fees on early extinguishment of debt   956   – Total $ 123,721 $ 122,174 Interest paid in cash, including payments related to derivative contracts, amounted to $ 35.4 million and $ 38.4 million for the third quarter of fiscal 2022 and 2021, respectively, and $ 106.9 million and $ 116.9 million for the first nine months of fiscal 2022 and 2021, respectively. Interest Rates Interest rates and Company borrowings were as follows:     Revolving Credit Activity       Quarter Ended December 31,       2021   2020       (Unaudited)       (In thousands, except interest rates)   Weighted average interest rate during the period   1.38 % 1.66 % Interest rate at the end of the period   1.39 % 1.65 % Maximum amount outstanding during the period $ 1,085,000 $ 1,082,000   Average amount outstanding during the period $ 1,081,283 $ 1,057,380   Facility fees $ 66 $ 91       Revolving Credit Activity       Nine Months Ended December 31,       2021   2020       (Unaudited)       (In thousands, except interest rates)   Weighted average interest rate during the period   1.38 % 1.65 % Interest rate at the end of the period   1.39 % 1.65 % Maximum amount outstanding during the period $ 1,093,000 $ 1,175,000   Average amount outstanding during the period $ 1,081,571 $ 1,092,382   Facility fees $ 198 $ 185  
v3.22.0.1
Derivatives
 9 Months Ended
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
5. Derivatives 5. 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 LIBOR swap rates with the designated benchmark interest rate being hedged on certain of our LIBOR indexed variable rate debt.   The interest rate swaps effectively fix our interest payments on certain LIBOR indexed variable rate debt. 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 condensed consolidated balance sheet were as follows:     Derivatives Fair Values as of     December 31, 2021   March 31, 2021     (Unaudited)     (In thousands) Interest rate contracts designated as hedging instruments:         Assets $ – $ – Liabilities $ 2,051 $ 5,141 Notional amount $ 235,000 $ 235,000       The Effect of Interest Rate Contracts on the Statements of Operations for the Quarters Ended         December 31, 2021   December 31, 2020     (Unaudited)     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (1,242) $ (1,007) (Gain) loss reclassified from AOCI into income $ ( 1,007 ) $ ( 972 ) Gains or losses recognized in income on interest rate derivatives are recorded as interest expense in the condensed consolidated statements of operations. During the first nine months of fiscal 2022, we recognized a decrease in the fair value of our cash flow hedges of $0.1 million, net of taxes. During the first nine months of fiscal 2022, we reclassified $2.3 million from accumulated other comprehensive income (loss) (“AOCI”) to interest expense. As of December 31, 2021, we expect to reclassify $2.3 million of net losses on interest rate contracts from AOCI to earnings as interest expense over the next twelve months. We use derivatives to 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 market value on our balance sheet. As of September 30, 2021 and December 31, 2020, these derivative hedges had a net market value of $ 6.6 million and $ 6.6 million, with notional amounts of $ 399.1 million and $ 282.7 million, respectively. The change in the fair value of these derivative hedges that was recognized in earnings was a gain of ($0.8) million for the quarter ended September 30, 2021 and a loss of $44 thousand for the nine months ended September 30, 2021. These derivative instruments are included in Investments, other, on the consolidated balance sheets. 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 change in fair value of the call options include the gains or losses recognized at the expiration of the option term and the changes in the fair value for open contracts.
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Accumulated Other Comprehensive Income (Loss)
 9 Months Ended
Dec. 31, 2021
Disclosure Text Block [Abstract]  
6. Comprehensive Income (Loss) 6. Accumulated Other Comprehensive Income (Loss) A summary of AOCI components, net of tax, were as follows:     Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Market Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)     (Unaudited)     (In thousands) Balance as of March 31, 2021 $ (52,929) $   167,653 $   (3,879) $   (3,988) $   106,857 Foreign currency translation   (2,288)   –   –   –   (2,288) Unrealized net loss on investments   –   (43,637)   –   –   (43,637) Change in fair value of cash flow hedges   –   –   71   –   71 Amounts reclassified into earnings on hedging activities   –   –   2,261   –   2,261 Other comprehensive income (loss)   (2,288)   (43,637)   2,332   –   (43,593) Balance as of December 31, 2021 $ ( 55,217 ) $   124,016 $   ( 1,547 ) $   ( 3,988 ) $   63,264
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Stockholders' Equity
 9 Months Ended
Dec. 31, 2021
Stockholders' Equity [Abstract]  
7. Stockholders' Equity 7. Stockholders’ Equity The following table lists the dividends that have been declared and issued for fiscal 2022: Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               June 9, 2021 $ 0.50   June 24, 2021   July 8, 2021 August 19, 2021 $ 0.50   September 7, 2021   September 21, 2021 October 6, 2021 $ 0.50   October 18, 2021   October 29, 2021 As of December 31, 2021, no awards had been issued under the 2016 AMERCO Stock Option Plan.
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Leases
 9 Months Ended
Dec. 31, 2021
Leases [Abstract]  
8. Leases 8. Leases 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 15, Revenue Recognition, to the Notes to Condensed Consolidated Financial Statements. Lessee We determine if an arrangement is a lease at inception. Operating leases, which are comprised primarily of storage rental locations, are included in ROU assets – operating, net and operating lease liability in our condensed consolidated balance sheets. Finance leases, which are comprised primarily of rental equipment leases, are included in ROU assets - financing, net, and notes, loans and finance leases payable, net in our 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 amortizing 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. 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 are classified as financing leases, and therefore the 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 4, Borrowings, of the Notes to Condensed Consolidated Financial Statements for additional information. The following tables show the components of our ROU assets:     As of December 31, 2021     Finance   Operating   Total     (Unaudited)     (In thousands)               Buildings and improvements $ – $ 136,213 $ 136,213 Furniture and equipment   14,732   –   14,732 Rental trailers and other rental equipment   173,940   –   173,940 Rental trucks   1,243,830   –   1,243,830 Right-of-use assets, gross   1,432,502   136,213   1,568,715 Less: Accumulated depreciation   (739,688)   (56,763)   (796,451) Right-of-use assets, net $ 692,814 $ 79,450 $ 772,264       As of March 31, 2021     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 132,901 $ 132,901 Furniture and equipment   22,316   –   22,316 Rental trailers and other rental equipment   203,594   –   203,594 Rental trucks   1,494,098   –   1,494,098 Right-of-use assets, gross   1,720,008   132,901   1,852,909 Less: Accumulated depreciation   (842,970)   (40,396)   (883,366) Right-of-use assets, net $ 877,038 $ 92,505 $ 969,543 As of   December 31, 2021 and March 31, 2021, we had finance leases for the ROU assets, net of $ 384.5 million and $ 513.6 million, respectively and operating leases of $ 79.3 million and $ 92.5 million, respectively.     Finance leases       December 31,   March 31,       2021   2021       (Unaudited)   Weighted average remaining lease term (years)   3   3   Weighted average discount rate   3.7 % 3.6 %       Operating leases       December 31,   March 31,       2021   2021       (Unaudited)   Weighted average remaining lease term (years)   16   14.7   Weighted average discount rate   4.6 % 4.6 % For the first nine months ended December 31, 2021 and 2020, cash paid for leases included in our operating cash flow activities were $ 22.6 million and $ 22.0 million, respectively, and our financing cash flow activities were $ 129.2 million and $ 173.5 million, respectively.   Non-cash activities of ROU assets in exchange for lease liabilities were $3.5 million and $5.9 million for the first nine months of fiscal 2022 and 2021, respectively.   The components of lease costs were as follows:     Nine Months Ended     December 31, 2021   December 31, 2020     (Unaudited)     (In thousands)           Operating lease costs $ 24,018 $ 22,564           Finance lease cost:         Amortization of ROU assets $ 90,056 $ 116,002 Interest on lease liabilities   14,290   17,448 Total finance lease cost $ 104,346 $ 133,450 Maturities of lease liabilities were as follows:     Finance leases   Operating leases     (Unaudited) Year ending December 31,   (In thousands)           2022 $ 142,702 $ 23,774 2023   122,157   22,123 2024   85,912   14,404 2025   48,427   4,974 2026   12,197   3,135 Thereafter   –   60,040 Total lease payments   411,395   128,450 Less: imputed interest   (26,890)   (49,116) Present value of lease liabilities $ 384,505 $ 79,334
v3.22.0.1
Contingencies
 9 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
9. Contingencies 9. Contingencies COVID-19 In March 2020, the World Health Organization declared COVID-19 a global pandemic, and governmental authorities around the world have implemented measures to reduce the spread of COVID-19. These measures along with the threat the virus poses have adversely affected workforces, customers, consumer sentiment, economies and financial markets. The Company has been impacted by the spread of COVID-19. The extent to which COVID-19 impacts the Company’s business, operations and financial results will continue to evolve in ways that the Company is not fully able to predict at this time. We have experienced customer initiated changes in behavior, actions by government entities, concerns from our workforce, and reactions from the capital markets. Although the Company cannot estimate the length or gravity of the impact of COVID-19 at this time, if the pandemic continues, it may have a material adverse effect on the Company’s results of future operations, financial position and liquidity in fiscal 2022 and beyond. CARES Act The Coronavirus Aid, Relief and Economic Security Act (“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. As a result of the federal income tax provisions of the CARES Act, we have filed applicable forms with the Internal Revenue Service (“IRS”) to carryback net operating losses.  These refund claims total approximately $366 million, of which we have received approximately $243 million in the first nine months of 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. It is possible future legislation could reduce or delay our ability to carryback these losses. Environmental Compliance with environmental requirements of federal, state and local governments may significantly 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 AMERCO’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.
v3.22.0.1
Related Party Transactions
 9 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
10. Related Party Transactions 10. Related Party Transactions As set forth in the Company’s Audit Committee Charter and consistent with NASDAQ Listing Rules, our Audit Committee (the “Audit Committee”) reviews and maintains oversight over related party transactions, which are required to be disclosed under the Securities and Exchange Commission (“SEC”) rules and regulations and in accordance with generally accepted accounting principles (“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. AMERCO 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 (“WGHLP”), 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 Revenue     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 6,972 $ 6,350 U-Haul management fee revenue from Mercury   2,679   2,415   $ 9,651 $ 8,765       Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 21,580 $ 19,142 U-Haul management fee revenue from Mercury   5,267   4,810   $ 26,847 $ 23,952 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 $ 27.1 million and $ 24.5 million from the above-mentioned entities during the first nine months of fiscal 2022 and 2021, respectively. 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. Related Party Costs and Expenses     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 604 $ 658 U-Haul commission expenses to Blackwater   21,086   18,099   $ 21,690 $ 18,757       Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 1,841 $ 1,973 U-Haul commission expenses to Blackwater   70,502   53,964   $ 72,343 $ 55,937 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 December 31, 2021, subsidiaries of Blackwater acted as independent dealers. The financial and other terms of the dealership contracts 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 $ 21.6 million, expenses of $ 1.8 million and cash flows of $ 19.8 million during the first nine months of fiscal 2022. Revenues and commission expenses related to the Dealer Agreements were $ 335.3 million and $ 70.5 million, respectively, during the first nine months of fiscal 2022. Management determined that we do not have a variable interest pursuant to the variable interest entity model under Accounting Standards Codification (“ASC”) 810 – Consolidation in the holding entities of Blackwater based upon management agreements which are with the individual operating entities; therefore, we are precluded from consolidating these entities. Related Party Assets     December 31,   March 31,     2021   2021     (Unaudited)         (In thousands) U-Haul receivable from Blackwater $ 45,804 $ 27,116 U-Haul receivable from Mercury   9,845   9,632 Other (a)   582   (1,353)   $ 56,231 $ 35,395 (a)       Timing differences for intercompany balances with insurance subsidiaries resulting from the three-month difference in reporting periods .
v3.22.0.1
Consolidating Financial Information by Industry Segment
 9 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
11. Consolidating Financial Information by Industry Segment 11. Consolidating Financial Information by Industry Segment: AMERCO’s three reportable segments are:   Moving and Storage, comprised of AMERCO, U-Haul, and Real Estate and the subsidiaries of UHaul 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 are shown as liabilities on the condensed consolidating statements. The information includes elimination entries necessary to consolidate AMERCO, the parent, with its subsidiaries. Investments in subsidiaries are accounted for by the parent using the equity method of accounting.
v3.22.0.1
Employee Benefit Plans
 9 Months Ended
Dec. 31, 2021
Compensation and Retirement Disclosure [Abstract]  
13. Employee Benefit Plans 13. Employee Benefit Plans The components of the net periodic benefit costs with respect to postretirement benefits were as follows:     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 350 $   317 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   227   230 Other components   53   17 Total other components of net periodic benefit costs   280   247 Net periodic postretirement benefit cost $ 630 $   564       Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 1,051 $   950 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   681   689 Other components   159   51 Total other components of net periodic benefit costs   840   740 Net periodic postretirement benefit cost $ 1,891 $   1,690
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Revenue Recognition
 9 Months Ended
Dec. 31, 2021
Revenue From Contract With Customer [Abstract]  
Revenue Recognition 15. Revenue Recognition Revenue Recognized in Accordance with 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 enter 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 as of December 31, 2021 and March 31, 2021. 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. The amount accrued in the third quarter of fiscal 2022 did not have a material effect on our financial statements. 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.  Please see Note 8, Leases, of the Notes to the Condensed Consolidated Financial Statements. 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 Ending December 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands)                           Self-moving equipment rentals $ 5,175 $ – $ – $ – $ – $ – Property lease revenues   16,211   12,024   8,610   6,450   5,286   48,888 Total $ 21,386 $ 12,024 $ 8,610 $ 6,450 $ 5,286 $ 48,888 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, revenue is disaggregated by timing of revenue recognition:     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   73,785 $   51,161 Revenues recognized at a point in time:   90,763   84,820 Total revenues recognized under ASC 606   164,548   135,981           Revenues recognized under ASC 842   1,154,751   945,024 Revenues recognized under ASC 944   53,853   53,397 Revenues recognized under ASC 320   31,184   35,580 Total revenues $   1,404,336 $   1,169,982       Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   261,638 $   165,445 Revenues recognized at a point in time:   322,405   304,522 Total revenues recognized under ASC 606   584,043   469,967           Revenues recognized under ASC 842   3,701,695   2,780,668 Revenues recognized under ASC 944   152,745   145,597 Revenues recognized under ASC 320   102,963   85,895 Total revenues $   4,541,446 $   3,482,127 In the above tables, 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 revenue, 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.
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Allowance for Credit Losses
 9 Months Ended
Dec. 31, 2021
Allowance For Credit Loss [Abstract]  
Allowance For Credit Losses [Text Block] 16. Allowance for Credit Losses Trade Receivables Moving and Storage has two (2) primary components of trade receivables, receivables from corporate customers and credit card receivables from sales and rental of equipment.  For credit card receivable, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivable. 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 2%. Management developed this estimate based on its knowledge of past experience for which there were similar improvements in the economy. As a result, management applied the applicable credit loss rates to determine the expected credit loss estimate for each aging category. Accordingly, the allowance for expected credit losses at December 31, 2021 was $ 4.3 million. Available-for-Sale 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.   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 allowance for credit losses are recorded as provision for (or reversal of) credit loss expense. There were no incremental impairment charges recorded during the quarter ended December 31, 2021. Accrued Interest Receivable Accrued interest receivables on available for sale securities totaled $ 29.7 million as of September 30, 2021 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 in a timely manner.  Furthermore, we have elected to write off accrued interest receivables by reversing interest income. 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 recoverable Reinsurance recoverable on paid and unpaid benefits was less than 1 % of the total assets as of January 1, 2021 which is immaterial based on historical loss experience and high credit rating of the reinsurers. Premium receivables Premiums receivables   were $ 2.0 million as of September 30, 2021 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     (Unaudited)     (In thousands) Balance as of March 31, 2021 $ 2,835 $ 1,320 $ 501 $ 4,656 Allowance change   1,510   (1,320)   14   204 Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of December 31, 2021 $ 4,345 $ – $ 515 $ 4,860
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Accounting Pronouncements
 9 Months Ended
Dec. 31, 2021
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]  
New Accounting Pronouncements And Changes In Accounting Principles [Text Block] 17.   Accounting Pronouncements Adoption of New Accounting Pronouncements In April 1, 2021, we adopted ASU 2020-08, Clarifying Guidance on Amortization of the Excess of the Cost Basis of Certain Callable Debt Securities Over the Amount Repayable.   This standard requires that, for each reporting period, callable debt securities be reevaluated to determine if they remain subject to the guidance, which will depend on the amortized cost basis of the security and the terms of the next call option.   The guidance is effective for fiscal years beginning after December 15, 2020. The adoption of the standard did not have a material impact on our consolidated financial statements. Recent Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued ASU 2018-12, Targeted Improvements to the Accounting for Long-Duration Contracts (“ASU 2018-12”). The amendments in this update require insurance companies to annually review and update the assumptions used for measuring the liability under long-duration contracts, such as life insurance, disability income, and annuities. The amendment prescribes standardized liability discount rate, consistency in measurement of market risk benefits, simplified amortization of deferred acquisition costs and enhanced disclosures. The amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 31, 2020. In November 2020, FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944) , which deferred the effective date of ASU 2018-12 to years beginning after December 15, 2022. We are currently in the process of evaluating the impact of the adoption of ASU 2018-12 on our financial statements; however, the adoption of ASU 2018-12 will impact the statements of operations because the effect of any update to the assumptions we used at the inception of the contracts will be recorded in net income. In March 2020, FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). This standard provides temporary optional expedients and exceptions to the US GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from the LIBOR and other interbank offered rates to alternative reference rates, such as Secured Overnight Financing Rate. Entities can elect not to apply certain modification accounting requirements to contracts affected by what the guidance calls reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. The guidance is effective upon issuance and generally can be applied through December 31, 2022. We are currently evaluating the impact of this standard on our consolidated financial statements. In January 2021, FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), (“ASU 2021-01”).   The amendments in ASU 2021-01 provide optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued because of the reference rate reform.   We adopted ASU 2021-01 on a prospective basis effect and there was no impact to our consolidated financial statements. 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.
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Investments (Table Text Block)
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Investments Debt Equity Securities [Abstract]    
Available-for-Sale Investments     Amortized   Gross   Gross   Gross   Allowance for Expected Credit Losses   Estimated     (Unaudited)     (In thousands) U.S. treasury securities and government obligations $ 118,140 $   9,039 $   – $   (678) $   – $   126,501 U.S. government agency mortgage-backed securities   57,083   370   –   (2,439)   –   55,014 Obligations of states and political subdivisions   191,141   16,734   (80)   (474)   –   207,321 Corporate securities   2,029,477   157,250   (26)   (5,818)   –   2,180,883 Mortgage-backed securities   163,430   10,003   (1)   –   –   173,432  $ 2,559,271 $  193,396 $ ( 107 )$ ( 9,409 )$  – $  2,743,151     Amortized   Gross   Gross   Gross   Allowance for Expected Credit Losses   Estimated           (In thousands) U.S. treasury securities and government obligations $ 92,429 $   12,941 $   – $   – $   – $   105,370 U.S. government agency mortgage-backed securities   61,427   911   (1)   (132)   –   62,205 Obligations of states and political subdivisions   230,521   25,249   (59)   (3)   –   255,708 Corporate securities   1,846,507   199,447   (163)   (641)   (1,319)   2,043,831 Mortgage-backed securities   174,728   11,706   (1)   (8)   –   186,425  $ 2,405,612 $  250,254 $ ( 224 )$ ( 784 )$ ( 1,319 )$  2,653,539
Adjusted Cost and Estimated Market Value of Available-for-sale Investments     December 31, 2021   March 31, 2021     Amortized   Estimated   Amortized   Estimated     (Unaudited)         (In thousands) Due in one year or less $ 69,891 $ 71,172 $ 90,142 $ 91,190 Due after one year through five years   572,812   609,255   562,442   601,818 Due after five years through ten years   677,891   745,523   672,733   754,536 Due after ten years   1,075,247   1,143,769   905,567   1,019,570     2,395,841   2,569,719   2,230,884   2,467,114                   Mortgage-backed securities   163,430   173,432   174,728   186,425  $ 2,559,271 $ 2,743,151 $ 2,405,612 $ 2,653,539  
Available for sale equity investments     December 31, 2021   March 31, 2021     Cost   Market   Cost   Market     (Unaudited)             (In thousands)                   Common stocks $ 9,775 $ 24,179 $ 9,775 $ 20,440 Non-redeemable preferred stocks   26,054   28,112   20,034   21,677  $ 35,829 $ 52,291 $ 29,809 $ 42,117  
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Borrowings (Table Text Block)
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Debt Instruments [Abstract]    
Long-Term Debt                         December 31,   March 31,   2022 Rates     Maturities   2021   2021                 (Unaudited)                     (In thousands) Real estate loan (amortizing term)       1.61 %       2023 $ 51,925 $   82,913 Senior mortgages 2.70 % - 5.50 %   2022 - 2042   2,199,110   2,125,324 Real estate loans (revolving credit) (a) 1.34 % - 3.14 %   2023 - 2025   535,000   535,000 Fleet loans (amortizing term) 1.61 % - 4.66 %   2022 - 2028   136,790   176,295 Fleet loans (revolving credit) 1.25 %   2.36 %   2024 - 2026   550,000   535,000 Finance leases (rental equipment) 1.92 % - 5.04 %   2022 - 2026   384,505   513,623 Finance liability (rental equipment) 1.60 % - 4.22 %   2024 - 2029   886,254   644,375 Private placements 2.43 %   2.78 %   2029 - 2033   600,000   – Other obligations 1.50 % - 8.00 %   2022 - 2049   87,777   86,085 Notes, loans and finance leases payable                   5,431,361   4,698,615 Less: Debt issuance costs                     (33,505)   (29,708) Total notes, loans and finance leases payable, net         $ 5,397,856 $   4,668,907                             (a) Certain loans have interest rate swaps fixing the rate between 3.03% and 3.14% based on current margins.   
Annual Maturities of Notes, Loans and Leases Payable       Year Ending December 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands) Notes, loans and finance leases payable, secured$ 515,591 $ 611,940 $ 1,084,053 $ 539,695 $ 661,676 $ 2,018,406
Components of interest expense     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) Interest expense $ 43,850 $ 41,371 Capitalized interest   (2,222)   (2,105) Amortization of transaction costs   1,407   1,890 Interest expense resulting from cash flow hedges   1,007   972 Total interest expense   44,042   42,128 Fees on early extinguishment of debt   956   – Total $ 44,998 $ 42,128     Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) Interest expense $ 122,589 $ 124,882 Capitalized interest   (6,974)   (10,033) Amortization of transaction costs   4,153   4,645 Interest expense resulting from cash flow hedges   2,997   2,680 Total interest expense   122,765   122,174 Fees on early extinguishment of debt   956   – Total $ 123,721 $ 122,174
Interest rates and company borrowings     Revolving Credit Activity       Quarter Ended December 31,       2021   2020       (Unaudited)       (In thousands, except interest rates)   Weighted average interest rate during the period   1.38 % 1.66 % Interest rate at the end of the period   1.39 % 1.65 % Maximum amount outstanding during the period $ 1,085,000 $ 1,082,000   Average amount outstanding during the period $ 1,081,283 $ 1,057,380   Facility fees$ 66 $ 91       Revolving Credit Activity       Nine Months Ended December 31,       2021   2020       (Unaudited)       (In thousands, except interest rates)   Weighted average interest rate during the period   1.38 % 1.65 % Interest rate at the end of the period   1.39 % 1.65 % Maximum amount outstanding during the period $ 1,093,000 $ 1,175,000   Average amount outstanding during the period $ 1,081,571 $ 1,092,382   Facility fees$ 198 $ 185  
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Derivatives (Table Text Block)
 9 Months Ended
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of derivative instruments in statement of financial position, fair value     Derivatives Fair Values as of     December 31, 2021   March 31, 2021     (Unaudited)     (In thousands) Interest rate contracts designated as hedging instruments:         Assets $ – $ – Liabilities $ 2,051 $ 5,141 Notional amount$ 235,000 $ 235,000
Effect of Interest Rate Contracts on the Statement of Operations     The Effect of Interest Rate Contracts on the Statements of Operations for the Quarters Ended         December 31, 2021   December 31, 2020     (Unaudited)     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (1,242) $ (1,007) (Gain) loss reclassified from AOCI into income$( 1,007 )$( 972 )
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Accumulated Other Comprehensive Income (loss) (Table Text Block)
 9 Months Ended
Dec. 31, 2021
Table Text Block Supplement [Abstract]  
Summary of accumulated other comprehensive income (loss) components, net of tax     Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Market Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)     (Unaudited)     (In thousands) Balance as of March 31, 2021 $ (52,929) $   167,653 $   (3,879) $   (3,988) $   106,857 Foreign currency translation   (2,288)   –   –   –   (2,288) Unrealized net loss on investments   –   (43,637)   –   –   (43,637) Change in fair value of cash flow hedges   –   –   71   –   71 Amounts reclassified into earnings on hedging activities   –   –   2,261   –   2,261 Other comprehensive income (loss)   (2,288)   (43,637)   2,332   –   (43,593) Balance as of December 31, 2021$( 55,217 )$  124,016 $ ( 1,547 )$ ( 3,988 )$  63,264
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Stockholders' Equity (Table Text Block)
 9 Months Ended
Dec. 31, 2021
Stockholders' Equity [Abstract]  
Common stock dividends Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               June 9, 2021 $ 0.50   June 24, 2021   July 8, 2021 August 19, 2021 $ 0.50   September 7, 2021   September 21, 2021 October 6, 2021$ 0.50  October 18, 2021 October 29, 2021
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Leases (Table Text Block)
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Mar. 31, 2021
Leases [Abstract]      
Supplemental Balance Sheet Information Related to Leases       As of December 31, 2021     Finance   Operating   Total     (Unaudited)     (In thousands)               Buildings and improvements $ – $ 136,213 $ 136,213 Furniture and equipment   14,732   –   14,732 Rental trailers and other rental equipment   173,940   –   173,940 Rental trucks   1,243,830   –   1,243,830 Right-of-use assets, gross   1,432,502   136,213   1,568,715 Less: Accumulated depreciation   (739,688)   (56,763)   (796,451) Right-of-use assets, net$ 692,814 $ 79,450 $ 772,264     As of March 31, 2021     Finance   Operating   Total     (In thousands)               Buildings and improvements $ – $ 132,901 $ 132,901 Furniture and equipment   22,316   –   22,316 Rental trailers and other rental equipment   203,594   –   203,594 Rental trucks   1,494,098   –   1,494,098 Right-of-use assets, gross   1,720,008   132,901   1,852,909 Less: Accumulated depreciation   (842,970)   (40,396)   (883,366) Right-of-use assets, net$ 877,038 $ 92,505 $ 969,543
Summary of Weighted-average remaining lease terms and Discount rates     Finance leases       December 31,   March 31,       2021   2021       (Unaudited)   Weighted average remaining lease term (years)   3   3   Weighted average discount rate  3.7 % 3.6 %     Operating leases       December 31,   March 31,       2021   2021       (Unaudited)   Weighted average remaining lease term (years)   16   14.7   Weighted average discount rate  4.6 % 4.6 %  
Components of Lease Expense       Nine Months Ended     December 31, 2021   December 31, 2020     (Unaudited)     (In thousands)           Operating lease costs $ 24,018 $ 22,564           Finance lease cost:         Amortization of ROU assets $ 90,056 $ 116,002 Interest on lease liabilities   14,290   17,448 Total finance lease cost$ 104,346 $ 133,450  
Maturities of Lease Liabilities       Finance leases   Operating leases     (Unaudited) Year ending December 31,   (In thousands)           2022 $ 142,702 $ 23,774 2023   122,157   22,123 2024   85,912   14,404 2025   48,427   4,974 2026   12,197   3,135 Thereafter   –   60,040 Total lease payments   411,395   128,450 Less: imputed interest   (26,890)   (49,116) Present value of lease liabilities$ 384,505 $ 79,334  
v3.22.0.1
Related Party Transations (Table Text Block)
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Related Party Revenue [Abstract]    
Related Party Revenue     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 6,972 $ 6,350 U-Haul management fee revenue from Mercury   2,679   2,415  $ 9,651 $ 8,765     Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 21,580 $ 19,142 U-Haul management fee revenue from Mercury   5,267   4,810  $ 26,847 $ 23,952
Related Party costs and expenses     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 604 $ 658 U-Haul commission expenses to Blackwater   21,086   18,099  $ 21,690 $ 18,757     Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 1,841 $ 1,973 U-Haul commission expenses to Blackwater   70,502   53,964  $ 72,343 $ 55,937
Related party assets       December 31,   March 31,     2021   2021     (Unaudited)         (In thousands) U-Haul receivable from Blackwater $ 45,804 $ 27,116 U-Haul receivable from Mercury   9,845   9,632 Other (a)   582   (1,353)   $ 56,231 $ 35,395 (a)      
v3.22.0.1
Consolidating Financial Information By Industry Segment (Table Text Block)
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2021
Table Text Block Supplement [Abstract]          
Consolidated Balance Sheet by Industry Segment         Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (Unaudited)     (In thousands) Assets:   Cash and cash equivalents $ 2,254,215 $ 8,065 $ 65,182 $ –   $ 2,327,462 Reinsurance recoverables and trade receivables, net   127,753   65,502   37,182   –     230,437 Inventories and parts, net   166,588   –   –   –     166,588 Prepaid expenses   211,449   –   –   –     211,449 Investments, fixed maturities and marketable equities   –   285,212   2,510,230   –     2,795,442 Investments, other   20,766   118,936   462,669   –     602,371 Deferred policy acquisition costs, net   –   –   101,770   –     101,770 Other assets   37,916   575   2,655   –     41,146 Right of use assets - financing, net   692,814   –   –   –     692,814 Right of use assets - operating, net   79,211   123   116   –     79,450 Related party assets   71,882   7,674   14,289   (37,614) (c)   56,231     3,662,594   486,087   3,194,093   (37,614)     7,305,160                         Investment in subsidiaries   736,500   –   –   (736,500) (b)   –                         Property, plant and equipment, at cost:                       Land   1,264,742   –   –   –     1,264,742 Buildings and improvements   5,726,481   –   –   –     5,726,481 Furniture and equipment   841,957   –   –   –     841,957 Rental trailers and other rental equipment   569,150   –   –   –     569,150 Rental trucks   4,425,113   –   –   –     4,425,113     12,827,443   –   –   –     12,827,443 Less:   Accumulated depreciation   (3,544,525)   –   –   –     (3,544,525) Total property, plant and equipment, net   9,282,918   –   –   –     9,282,918 Total assets $ 13,682,012 $ 486,087 $ 3,194,093 $ (774,114)   $ 16,588,078                         (a) Balances as of September 30, 2021                       (b) Eliminate investment in subsidiaries                       (c) Eliminate intercompany receivables and payables                         Consolidating balance sheets by industry segment as of December 31, 2021, continued:     Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Liabilities:                       Accounts payable and accrued expenses $ 625,504 $ 3,687 $ 5,604 $ –   $ 634,795 Notes, loans and finance leases payable, net   5,397,856   –   –   –     5,397,856 Operating lease liability   79,086   124   124   –     79,334 Policy benefits and losses, claims and loss expenses payable   428,029   176,955   398,911   –     1,003,895 Liabilities from investment contracts   –   –   2,302,591   –     2,302,591 Other policyholders' funds and liabilities   –   3,759   5,851   –     9,610 Deferred income   43,352   –   –   –     43,352 Deferred income taxes, net   1,271,449   12,702   17,078   –     1,301,229 Related party liabilities   25,145   3,414   12,880   (41,439) (c)   – Total liabilities   7,870,421   200,641   2,743,039   (41,439)     10,772,662                         Stockholders' equity:                       Series preferred stock:                       Series A preferred stock   –   –   –   –     – Series B preferred stock   –   –   –   –     – Series A common stock   –   –   –   –     – Common stock   10,497   3,301   2,500   (5,801) (b)   10,497 Additional paid-in capital   454,029   91,120   26,271   (117,601) (b)   453,819 Accumulated other comprehensive income (loss)   59,439   18,405   101,787   (116,367) (b)   63,264 Retained earnings   5,965,276   172,620   320,496   (492,906) (b)   5,965,486 Cost of common stock in treasury, net   (525,653)   –   –   –     (525,653) Cost of preferred stock in treasury, net   (151,997)   –   –   –     (151,997) Total stockholders' equity   5,811,591   285,446   451,054   (732,675)     5,815,416 Total liabilities and stockholders' equity $ 13,682,012 $ 486,087 $ 3,194,093 $ (774,114)   $ 16,588,078                         (a) Balances as of September 30, 2021                       (b) Eliminate investment in subsidiaries                       (c) Eliminate intercompany receivables and payables                  Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated       Assets:   (In thousands) Cash and cash equivalents $   1,010,275 $   5,658 $   178,079 $   –   $   1,194,012 Reinsurance recoverables and trade receivables, net   118,741   67,069   38,616   –     224,426 Inventories and parts, net   105,577   –   –   –     105,577 Prepaid expenses   469,144   –   –   –     469,144 Investments, fixed maturities and marketable equities   –   295,753   2,399,903   –     2,695,656 Investments, other   20,733   90,412   378,614   –     489,759 Deferred policy acquisition costs, net   –   –   89,749   –     89,749 Other assets   44,763   436   2,531   –     47,730 Right of use assets - financing, net   877,038   –   –   –     877,038 Right of use assets - operating, net   92,245   92   168   –     92,505 Related party assets   54,042   6,854   13,850   (39,351) (c)   35,395     2,792,558   466,274   3,101,510   (39,351)     6,320,991                         Investment in subsidiaries   741,860   –   –   (741,860) (b)   –                         Property, plant and equipment, at cost:                       Land   1,075,813   –   –   –     1,075,813 Buildings and improvements   5,163,705   –   –   –     5,163,705 Furniture and equipment   786,505   –   –   –     786,505 Rental trailers and other rental equipment   477,921   –   –   –     477,921 Rental trucks   3,909,724   –   –   –     3,909,724     11,413,668   –   –   –     11,413,668 Less:   Accumulated depreciation   (3,083,053)   –   –   –     (3,083,053) Total property, plant and equipment, net   8,330,615   –   –   –     8,330,615 Total assets $   11,865,033 $   466,274 $   3,101,510 $   (781,211)   $   14,651,606                         (a) Balances as of December 31, 2020                       (b) Eliminate investment in subsidiaries                       (c) Eliminate intercompany receivables and payables                         Consolidating balance sheets by industry segment as of March 31, 2021, continued:     Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO                             (In thousands) Liabilities:                       Accounts payable and accrued expenses $ 636,257 $ 2,029 $ 7,289 $ –   $ 645,575 Notes, loans and finance leases payable, net   4,657,720   –   11,187   –     4,668,907 Operating lease liability   92,236   96   178   –     92,510 Policy benefits and losses, claims and loss expenses payable   427,073   178,942   391,686   –     997,701 Liabilities from investment contracts   –   –   2,161,530   –     2,161,530 Other policyholders' funds and liabilities   –   3,698   8,722   –     12,420 Deferred income   42,592   –   –   –     42,592 Deferred income taxes, net   1,136,149   13,046   29,294   –     1,178,489 Related party liabilities   25,413   5,821   12,406   (43,640) (c)   – Total liabilities   7,017,440   203,632   2,622,292   (43,640)     9,799,724                         Stockholders' equity:                       Series preferred stock:                       Series A preferred stock   –   –   –   –     – Series B preferred stock   –   –   –   –     – Series A common stock   –   –   –   –     – Common stock   10,497   3,301   2,500   (5,801) (b)   10,497 Additional paid-in capital   454,029   91,120   26,271   (117,601) (b)   453,819 Accumulated other comprehensive income (loss)   102,568   22,546   140,817   (159,074) (b)   106,857 Retained earnings   4,958,149   145,675   309,630   (455,095) (b)   4,958,359 Cost of common stock in treasury, net   (525,653)   –   –   –     (525,653) Cost of preferred stock in treasury, net   (151,997)   –   –   –     (151,997) Total stockholders' equity   4,847,593   262,642   479,218   (737,571)     4,851,882 Total liabilities and stockholders' equity $ 11,865,033 $ 466,274 $ 3,101,510 $ (781,211)   $ 14,651,606                         (a) Balances as of December 31, 2020                       (b) Eliminate investment in subsidiaries                       (c) Eliminate intercompany receivables and payables           
Consolidated Statement of Operations by Industry Segment     Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Revenues:                       Self-moving equipment rentals $ 977,052 $ – $ – $ (1,500) (c) $ 975,552 Self-storage revenues   159,424   –   –   –     159,424 Self-moving and self-storage products and service sales   75,402   –   –   –     75,402 Property management fees   9,651   –   –   –     9,651 Life insurance premiums   –   –   27,010   –     27,010 Property and casualty insurance premiums   –   26,477   –   (859) (c)   25,618 Net investment and interest income   666   3,343   28,182   (1,007) (b)   31,184 Other revenue   99,385   –   1,225   (115) (b)   100,495 Total revenues   1,321,580   29,820   56,417   (3,481)     1,404,336                         Costs and expenses:                       Operating expenses   642,900   12,198   5,465   (2,468) (b,c)   658,095 Commission expenses   105,155   –   –   –     105,155 Cost of sales   57,042   –   –   –     57,042 Benefits and losses   –   7,892   39,374   –     47,266 Amortization of deferred policy acquisition costs   –   –   7,947   –     7,947 Lease expense   7,917   73   28   (624) (b)   7,394 Depreciation, net of gains on disposal   103,736   –   –   –     103,736 Net losses on disposal of real estate   977   –   –   –     977 Total costs and expenses   917,727   20,163   52,814   (3,092)     987,612                         Earnings from operations before equity in earnings of subsidiaries   403,853   9,657   3,603   (389)     416,724                         Equity in earnings of subsidiaries   10,403   –   –   (10,403) (d)   –                         Earnings from operations   414,256   9,657   3,603   (10,792)     416,724 Other components of net periodic benefit costs   (280)   –   –   –     (280) Interest expense   (44,311)   –   (120)   389 (b)   (44,042) Fees on early extinguishment of debt   (956)   –   –   –     (956) Pretax earnings   368,709   9,657   3,483   (10,403)     371,446 Income tax expense   (87,243)   (2,027)   (710)   –     (89,980) Earnings available to common stockholders $ 281,466 $ 7,630 $ 2,773 $ (10,403)   $ 281,466                         (a) Balances for the quarter ended September 30, 2021                       (b) Eliminate intercompany lease / interest income                       (c) Eliminate intercompany premiums                       (d) Eliminate equity in earnings of subsidiaries                 Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Revenues:                       Self-moving equipment rentals $ 809,371 $ – $ – $ (1,156) (c) $ 808,215 Self-storage revenues   123,024   –   –   –     123,024 Self-moving and self-storage products and service sales   74,586   –   –   –     74,586 Property management fees   8,765   –   –   –     8,765 Life insurance premiums   –   –   29,993   –     29,993 Property and casualty insurance premiums   –   20,706   –   (773) (c)   19,933 Net investment and interest income   524   5,934   30,092   (970) (b)   35,580 Other revenue   69,011   –   992   (117) (b)   69,886 Total revenues   1,085,281   26,640   61,077   (3,016)     1,169,982                         Costs and expenses:                       Operating expenses   526,884   10,072   5,027   (2,041) (b,c)   539,942 Commission expenses   86,891   –   –   –     86,891 Cost of sales   45,752   –   –   –     45,752 Benefits and losses   –   4,908   40,723   –     45,631 Amortization of deferred policy acquisition costs   –   –   6,572   –     6,572 Lease expense   8,024   169   31   (702) (b)   7,522 Depreciation, net of gains on disposal   152,602   –   –   –     152,602 Net losses on disposal of real estate   1,124   –   –   –     1,124 Total costs and expenses   821,277   15,149   52,353   (2,743)     886,036                         Earnings from operations before equity in earnings of subsidiaries   264,004   11,491   8,724   (273)     283,946                         Equity in earnings of subsidiaries   16,117   –   –   (16,117) (d)   –                         Earnings from operations   280,121   11,491   8,724   (16,390)     283,946 Other components of net periodic benefit costs   (247)   –   –   –     (247) Interest expense   (42,401)   –   –   273 (b)   (42,128) Pretax earnings   237,473   11,491   8,724   (16,117)     241,571 Income tax expense   (54,488)   (2,405)   (1,693)   –     (58,586) Earnings available to common stockholders $ 182,985 $ 9,086 $ 7,031 $ (16,117)   $ 182,985                         (a) Balances for the quarter ended September 30, 2020                       (b) Eliminate intercompany lease / interest income                       (c) Eliminate intercompany premiums                       (d) Eliminate equity in earnings of subsidiaries                Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Revenues:                       Self-moving equipment rentals $ 3,193,594 $ – $ – $ (3,604) (c) $ 3,189,990 Self-storage revenues   450,302   –   –   –     450,302 Self-moving and self-storage products and service sales   272,478   –   –   –     272,478 Property management fees   26,847   –   –   –     26,847 Life insurance premiums   –   –   84,628   –     84,628 Property and casualty insurance premiums   –   67,277   –   (2,291) (c)   64,986 Net investment and interest income   2,021   15,538   88,448   (3,044) (b)   102,963 Other revenue   346,591   –   2,985   (324) (b)   349,252 Total revenues   4,291,833   82,815   176,061   (9,263)     4,541,446                         Costs and expenses:                       Operating expenses   1,927,060   31,779   16,063   (6,204) (b,c)   1,968,698 Commission expenses   346,200   –   –   –     346,200 Cost of sales   193,448   –   –   –     193,448 Benefits and losses   –   16,679   122,515   –     139,194 Amortization of deferred policy acquisition costs   –   –   23,520   –     23,520 Lease expense   24,018   279   81   (1,896) (b)   22,482 Depreciation, net of gains on disposal   361,201   –   –   –     361,201 Net gains on disposal of real estate   (2,930)   –   –   –     (2,930) Total costs and expenses   2,848,997   48,737   162,179   (8,100)     3,051,813                         Earnings from operations before equity in earnings of subsidiaries   1,442,836   34,078   13,882   (1,163)     1,489,633                         Equity in earnings of subsidiaries   37,811   –   –   (37,811) (d)   –                         Earnings from operations   1,480,647   34,078   13,882   (38,974)     1,489,633 Other components of net periodic benefit costs   (840)   –   –   –     (840) Interest expense   (123,568)   –   (360)   1,163 (b)   (122,765) Fees on early extinguishment of debt   (956)   –   –   –     (956) Pretax earnings   1,355,283   34,078   13,522   (37,811)     1,365,072 Income tax expense   (318,744)   (7,133)   (2,656)   –     (328,533) Earnings available to common stockholders $ 1,036,539 $ 26,945 $ 10,866 $ (37,811)   $ 1,036,539                         (a) Balances for the nine months ended September 30, 2021                       (b) Eliminate intercompany lease / interest income                       (c) Eliminate intercompany premiums                       (d) Eliminate equity in earnings of subsidiaries                 Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Revenues:                       Self-moving equipment rentals $ 2,396,098 $ – $ – $ (2,568) (c) $ 2,393,530 Self-storage revenues   347,252   –   –   –     347,252 Self-moving and self-storage products and service sales   264,564   –   –   –     264,564 Property management fees   23,952   –   –   –     23,952 Life insurance premiums   –   –   91,958   –     91,958 Property and casualty insurance premiums   –   51,934   –   (2,398) (c)   49,536 Net investment and interest income   1,781   11,013   75,749   (2,648) (b)   85,895 Other revenue   223,252   –   2,583   (395) (b)   225,440 Total revenues   3,256,899   62,947   170,290   (8,009)     3,482,127                         Costs and expenses:                       Operating expenses   1,569,763   27,063   15,208   (5,347) (b,c)   1,606,687 Commission expenses   255,431   –   –   –     255,431 Cost of sales   159,516   –   –   –     159,516 Benefits and losses   –   11,376   119,284   –     130,660 Amortization of deferred policy acquisition costs   –   –   19,012   –     19,012 Lease expense   22,564   170   102   (1,841) (b)   20,995 Depreciation, net of gains on disposal   455,711   –   –   –     455,711 Net losses on disposal of real estate   4,293   –   –   –     4,293 Total costs and expenses   2,467,278   38,609   153,606   (7,188)     2,652,305                         Earnings from operations before equity in earnings of subsidiaries   789,621   24,338   16,684   (821)     829,822                         Equity in earnings of subsidiaries   32,850   –   –   (32,850) (d)   –                         Earnings from operations   822,471   24,338   16,684   (33,671)     829,822 Other components of net periodic benefit costs   (740)   –   –   –     (740) Interest expense   (122,995)   –   –   821 (b)   (122,174) Pretax earnings   698,736   24,338   16,684   (32,850)     706,908 Income tax expense   (161,660)   (5,121)   (3,051)   –     (169,832) Earnings available to common stockholders $ 537,076 $ 19,217 $ 13,633 $ (32,850)   $ 537,076                         (a) Balances for the nine months ended September 30, 2020                       (b) Eliminate intercompany lease / interest income                       (c) Eliminate intercompany premiums                       (d) Eliminate equity in earnings of subsidiaries             
Consolidated Cash Flow Statement by Industry Segment         Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (Unaudited) Cash flows from operating activities:   (In thousands) Net earnings $   1,036,539 $   26,945 $   10,866 $   (37,811)   $   1,036,539 Earnings from consolidated entities   (37,811)   –   –   37,811     – Adjustments to reconcile net earnings to the cash provided by operations:                       Depreciation   519,181   –   –   –     519,181 Amortization of deferred policy acquisition costs   –   –   23,520   –     23,520 Amortization of premiums and accretion of discounts related to investments, net   –   1,326   13,160   –     14,486 Amortization of debt issuance costs   4,200   –   –   –     4,200 Interest credited to policyholders   –   –   47,181   –     47,181 Change in allowance for losses on trade receivables   1,413   (174)   4   –     1,243 Change in allowance for inventories and parts reserve   9,799   –   –   –     9,799 Net gains on disposal of personal property   (157,980)   –   –   –     (157,980) Net gains on disposal of real estate   (2,930)   –   –   –     (2,930) Net gains on sales of investments   –   (223)   (3,272)   –     (3,495) Net gains on equity investments   –   (3,695)   –   –     (3,695) Deferred income taxes   134,541   763   (4,544)   –     130,760 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (10,403)   1,567   1,465   –     (7,371) Inventories and parts   (70,796)   –   –   –     (70,796) Prepaid expenses   257,591   –   –   –     257,591 Capitalization of deferred policy acquisition costs   –   –   (25,703)   –     (25,703) Other assets   1,213   72   (107)   –     1,178 Related party assets   (17,870)   (813)   –   –     (18,683) Accounts payable and accrued expenses   30,634   1,659   965   –     33,258 Policy benefits and losses, claims and loss expenses payable   1,172   (1,987)   7,226   –     6,411 Other policyholders' funds and liabilities   –   61   (2,871)   –     (2,810) Deferred income   687   –   (1,213)   –     (526) Related party liabilities   (267)   (2,414)   474   –     (2,207) Net cash provided by operating activities   1,698,913   23,087   67,151   –     1,789,151                         Cash flows from investing activities:                       Escrow deposits   5,695   –   –   –     5,695 Purchases of:                       Property, plant and equipment   (1,652,984)   –   –   –     (1,652,984) Short term investments   –   (31,074)   –   –     (31,074) Fixed maturities investments   –   (7,749)   (440,534)   –     (448,283) Equity securities   –   –   (1,380)   –     (1,380) Preferred stock   –   –   (8,000)   –     (8,000) Real estate   (33)   –   (157)   –     (190) Mortgage loans   –   (19,132)   (112,501)   –     (131,633) Proceeds from sales and paydowns of:                       Property, plant and equipment   483,783   –   –   –     483,783 Short term investments   –   20,608   61   –     20,669 Fixed maturities investments   –   13,816   270,531   –     284,347 Equity securities   –   –   2,026   –     2,026 Preferred stock   –   2,000   –   –     2,000 Mortgage loans   –   851   27,213   –     28,064 Net cash used by investing activities   (1,163,539)   (20,680)   (262,741)   –     (1,446,960)     (page 1 of 2) (a) Balance for the period ended September 30, 2021                       Consolidating cash flow statements by industry segment for the nine months ended December 31, 2021 are as follows:     Moving & Storage   Property & Casualty   Life   Elimination     AMERCO     (Unaudited) Cash flows from financing activities:   (In thousands) Borrowings from credit facilities   1,202,412   –   –   –     1,202,412 Principal repayments on credit facilities   (322,232)   –   (11,187)   –     (333,419) Payments of debt issuance costs   (8,006)   –   –   –     (8,006) Finance lease payments   (129,150)   –   –   –     (129,150) Common stock dividend paid   (29,412)   –   –   –     (29,412) Investment contract deposits   –   –   271,657   –     271,657 Investment contract withdrawals   –   –   (177,777)   –     (177,777) Net cash provided by financing activities   713,612   –   82,693   –     796,305                         Effects of exchange rate on cash   (5,046)   –   –   –     (5,046)                         Increase (decrease) in cash and cash equivalents   1,243,940   2,407   (112,897)   –     1,133,450 Cash and cash equivalents at beginning of period   1,010,275   5,658   178,079   –     1,194,012 Cash and cash equivalents at end of period $   2,254,215 $   8,065 $   65,182 $   –   $   2,327,462     (page 2 of 2) (a) Balance for the period ended September 30, 2021                Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (Unaudited) Cash flows from operating activities:   (In thousands) Net earnings $   537,076 $   19,217 $   13,633 $   (32,850)   $   537,076 Earnings from consolidated entities   (32,850)   –   –   32,850     – Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   495,794   –   –   –     495,794 Amortization of deferred policy acquisition costs   –   –   19,012   –     19,012 Amortization of premiums and accretion of discounts related to investments, net   –   1,180   9,017   –     10,197 Amortization of debt issuance costs   4,645   –   –   –     4,645 Interest credited to policyholders   –   –   38,672   –     38,672 Change in allowance for losses on trade receivables   (573)   –   (1)   –     (574) Change in allowance for inventories and parts reserve   3,259   –   –   –     3,259 Net gains on disposal of personal property   (40,083)   –   –   –     (40,083) Net losses on disposal of real estate   4,293   –   –   –     4,293 Net gains on sales of investments   –   (86)   (5,558)   –     (5,644) Net losses on equity investments   –   669   –   –     669 Deferred income taxes   116,099   1,685   (759)   –     117,025 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (39,327)   5,880   (6,052)   –     (39,499) Inventories and parts   (6,349)   –   –   –     (6,349) Prepaid expenses   112,428   –   –   –     112,428 Capitalization of deferred policy acquisition costs   –   –   (24,903)   –     (24,903) Other assets   30,337   286   (503)   –     30,120 Related party assets   (20,643)   (151)   –   –     (20,794) Accounts payable and accrued expenses   96,269   (2,106)   2,988   –     97,151 Policy benefits and losses, claims and loss expenses payable   10,526   (8,824)   12,394   –     14,096 Other policyholders' funds and liabilities   –   (5,671)   30,348   –     24,677 Deferred income   5,483   –   1,368   –     6,851 Related party liabilities   749   (946)   (1,369)   –     (1,566) Net cash provided by operating activities   1,277,133   11,133   88,287   –     1,376,553                         Cash flows from investing activities:                       Escrow deposits   (1,978)   –   –   –     (1,978) Purchases of:                       Property, plant and equipment   (961,995)   –   –   –     (961,995) Short term investments   –   (38,789)   (1)   –     (38,790) Fixed maturities investments   –   (10,438)   (341,869)   –     (352,307) Equity securities   –   –   (838)   –     (838) Preferred stock   –   –   (16,144)   –     (16,144) Real estate   –   –   (274)   –     (274) Mortgage loans   –   (14,780)   (77,501)   –     (92,281) Proceeds from sales and paydowns of:                       Property, plant and equipment   434,860   –   –   –     434,860 Short term investments   –   38,830   –   –     38,830 Fixed maturities investments   –   14,217   317,190   –     331,407 Equity securities   –   –   72   –     72 Preferred stock   –   1,200   –   –     1,200 Mortgage loans   –   879   3,865   –     4,744 Net cash used by investing activities   (529,113)   (8,881)   (115,500)   –     (653,494)     (page 1 of 2) (a) Balance for the period ended September 30, 2020                       Consolidating cash flow statements by industry segment for the nine months ended December 31, 2020 are as follows:       Moving & Storage   Property &   Life   Elimination     AMERCO     (Unaudited) Cash flows from financing activities:   (In thousands) Borrowings from credit facilities   780,932   –   9,600   –     790,532 Principal repayments on credit facilities   (558,280)   –   (9,788)   –     (568,068) Payment of debt issuance costs   (5,020)   –   –   –     (5,020) Finance lease payments   (173,520)   –   –   –     (173,520) Common stock dividend paid   (49,019)   –   –   –     (49,019) Net contribution from (to) related party   41,199   –   (18,599)   –     22,600 Investment contract deposits   –   –   326,055   –     326,055 Investment contract withdrawals   –   –   (169,008)   –     (169,008) Net cash provided by financing activities   36,292   –   138,260   –     174,552                         Effects of exchange rate on cash   6,877   –   –   –     6,877                         Increase in cash and cash equivalents   791,189   2,252   111,047   –     904,488 Cash and cash equivalents at beginning of period   459,078   4,794   30,480   –     494,352 Cash and cash equivalents at end of period $   1,250,267 $   7,046 $   141,527 $   –   $   1,398,840     (page 2 of 2) (a) Balance for the period ended September 30, 2020             
v3.22.0.1
Industry Segment and Geographic Area Data (Table Text Block)
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Geographic Areas, Long-Lived Assets [Abstract]    
Industry Segment and Geographic Area Data     United States   Canada   Consolidated     (Unaudited)     (All amounts are in thousands of U.S. $'s) Quarter Ended December 31, 2021             Total revenues $ 1,334,131 $ 70,205 $ 1,404,336 Depreciation and amortization, net of (gains) on disposal   110,383   2,277   112,660 Interest expense   43,140   902   44,042 Pretax earnings   360,449   10,997   371,446 Income tax expense   87,135   2,845   89,980 Identifiable assets   16,077,571   510,507   16,588,078               Quarter Ended December 31, 2020             Total revenues $ 1,114,816 $ 55,166 $ 1,169,982 Depreciation and amortization, net of (gains) on disposal   158,844   1,454   160,298 Interest expense   41,378   750   42,128 Pretax earnings   233,163   8,408   241,571 Income tax expense   56,237   2,349   58,586 Identifiable assets  14,020,573   426,732   14,447,305     United States   Canada   Consolidated     (Unaudited)     (All amounts are in thousands of U.S. $'s) Nine Months Ended December 31, 2021             Total revenues $ 4,307,322 $ 234,124 $ 4,541,446 Depreciation and amortization, net of (gains) on disposal   379,989   1,802   381,791 Interest expense   119,856   2,909   122,765 Pretax earnings   1,320,056   45,016   1,365,072 Income tax expense   317,057   11,476   328,533 Identifiable assets   16,077,571   510,507   16,588,078               Nine Months Ended December 31, 2020             Total revenues $ 3,318,854 $ 163,273 $ 3,482,127 Depreciation and amortization, net of (gains) on disposal   471,592   7,424   479,016 Interest expense   120,015   2,159   122,174 Pretax earnings   685,312   21,596   706,908 Income tax expense   163,644   6,188   169,832 Identifiable assets  14,020,573   426,732   14,447,305
v3.22.0.1
Employee Benefit Plans (Table Text Block)
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Compensation and Retirement Disclosure [Abstract]    
Components of Net Periodic Post Retirement Benefit Cost     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 350 $   317 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   227   230 Other components   53   17 Total other components of net periodic benefit costs   280   247 Net periodic postretirement benefit cost$ 630 $  564     Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 1,051 $   950 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   681   689 Other components   159   51 Total other components of net periodic benefit costs   840   740 Net periodic postretirement benefit cost$ 1,891 $  1,690
v3.22.0.1
Fair Value Measurements (Table Text Block)
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]    
Financial Instruments, Carrying and Estimated fair values     Fair Value Hierarchy     Carrying               Total Estimated As of December 31, 2021   Value   Level 1   Level 2   Level 3   Fair Value     (Unaudited) Assets   (In thousands) Reinsurance recoverables and trade receivables, net $ 230,437 $ – $ – $ 230,437 $ 230,437 Mortgage loans, net   494,790   –   –   494,790   494,790 Other investments   107,581   –   –   107,581   107,581 Total $ 832,808 $ – $ – $ 832,808 $ 832,808                                             Liabilities                     Notes, loans and finance leases payable   5,397,856   –   5,397,856   –   5,196,104 Total$ 5,397,856 $ – $ 5,397,856 $ – $ 5,196,104     Fair Value Hierarchy     Carrying               Total Estimated As of March 31, 2021   Value   Level 1   Level 2   Level 3   Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 224,426 $ – $ – $ 224,426 $ 224,426 Mortgage loans, net   391,230   –   –   391,230   391,230 Other investments   98,529   –   –   98,529   98,529 Total $ 714,185 $ – $ – $ 714,185 $ 714,185                                             Liabilities                     Notes, loans and finance leases payable   4,698,615   –   4,698,615   –   4,449,691 Total$ 4,698,615 $ – $ 4,698,615 $ – $ 4,449,691
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis As of December 31, 2021   Total   Level 1   Level 2   Level 3     (Unaudited) Assets   (In thousands) Short-term investments $ 2,102,275 $ 2,102,275 $ – $ – Fixed maturities - available for sale   2,743,151   17,103   2,725,938   110 Preferred stock   28,112   28,112   –   – Common stock   24,179   24,179   –   – Derivatives   6,557   6,557   –   – Total $ 4,904,274 $ 2,178,226 $ 2,725,938 $ 110                                     Liabilities                 Derivatives   2,051   –   2,051   – Total$ 2,051 $ – $ 2,051 $ – As of March 31, 2021   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 839,250 $ 839,250 $ – $ – Fixed maturities - available for sale   2,653,539   6,967   2,646,415   157 Preferred stock   21,677   21,677   –   – Common stock   20,440   20,440   –   – Derivatives   6,601   6,601   –   – Total $ 3,541,507 $ 894,935 $ 2,646,415 $ 157                                     Liabilities                 Derivatives   5,141   –   5,141   – Total$ 5,141 $ – $ 5,141 $ –
v3.22.0.1
Revenue Recognition (Table Text Block)
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Revenue From Contract With Customer [Abstract]    
Disaggregation Of Revenue     Quarter Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   73,785 $   51,161 Revenues recognized at a point in time:   90,763   84,820 Total revenues recognized under ASC 606   164,548   135,981           Revenues recognized under ASC 842   1,154,751   945,024 Revenues recognized under ASC 944   53,853   53,397 Revenues recognized under ASC 320   31,184   35,580 Total revenues$  1,404,336 $  1,169,982     Nine Months Ended December 31,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   261,638 $   165,445 Revenues recognized at a point in time:   322,405   304,522 Total revenues recognized under ASC 606   584,043   469,967           Revenues recognized under ASC 842   3,701,695   2,780,668 Revenues recognized under ASC 944   152,745   145,597 Revenues recognized under ASC 320   102,963   85,895 Total revenues$  4,541,446 $  3,482,127
Next five years and thereafter revenue       Year Ending December 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands)                           Self-moving equipment rentals $ 5,175 $ – $ – $ – $ – $ – Property lease revenues   16,211   12,024   8,610   6,450   5,286   48,888 Total$ 21,386 $ 12,024 $ 8,610 $ 6,450 $ 5,286 $ 48,888
v3.22.0.1
Allowance for Credit Losses (Table Text Block)
 9 Months Ended
Dec. 31, 2021
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     (Unaudited)     (In thousands) Balance as of March 31, 2021 $ 2,835 $ 1,320 $ 501 $ 4,656 Allowance change   1,510   (1,320)   14   204 Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of December 31, 2021$ 4,345 $ – $ 515 $ 4,860
v3.22.0.1
Basis of Presentation (Narratives) (Details)
 9 Months Ended
Dec. 31, 2021
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]  
Number of reportable segments 3
v3.22.0.1
Investments (Narratives) (Details) - USD ($)
$ in Millions
 9 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Insurance Regulatory Authorites:    
Assets held by insurance regulators $ 26.6 $ 27.7
Available for sale securities:    
Fair value of sold available for sale securites 278.8  
Available-for-sale securities, gross realized gains 4.7  
Available-for-sale securities, gross realized losses $ 3.0  
v3.22.0.1
Investments (Available For Sale Investments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Available-for-sale Securities [Abstract]    
Amortized cost $ 2,559,271 $ 2,405,612
Gross Unrealized Gains 193,396 250,254
Gross unrealized losses more than 12 months (107) (224)
Gross unrealized losses less than 12 months (9,409) (784)
Allowance for Expected Credit Losses 0 (1,319)
Estimated market value 2,743,151 2,653,539
U.S. treasury securities and government obligations [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 118,140 92,429
Gross Unrealized Gains 9,039 12,941
Gross unrealized losses more than 12 months 0 0
Gross unrealized losses less than 12 months (678) 0
Allowance for Expected Credit Losses 0 0
Estimated market value 126,501 105,370
U.S. government agency mortgage-backed securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 57,083 61,427
Gross Unrealized Gains 370 911
Gross unrealized losses more than 12 months 0 (1)
Gross unrealized losses less than 12 months (2,439) (132)
Allowance for Expected Credit Losses 0 0
Estimated market value 55,014 62,205
Obligations of states and political subdivisions [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 191,141 230,521
Gross Unrealized Gains 16,734 25,249
Gross unrealized losses more than 12 months (80) (59)
Gross unrealized losses less than 12 months (474) (3)
Allowance for Expected Credit Losses 0 0
Estimated market value 207,321 255,708
Corporate securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 2,029,477 1,846,507
Gross Unrealized Gains 157,250 199,447
Gross unrealized losses more than 12 months (26) (163)
Gross unrealized losses less than 12 months (5,818) (641)
Allowance for Expected Credit Losses 0 (1,319)
Estimated market value 2,180,883 2,043,831
Mortgage-backed securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 163,430 174,728
Gross Unrealized Gains 10,003 11,706
Gross unrealized losses more than 12 months (1) (1)
Gross unrealized losses less than 12 months 0 (8)
Allowance for Expected Credit Losses 0 0
Estimated market value $ 173,432 $ 186,425
v3.22.0.1
Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Available-for-sale securities, amortized cost:    
Amortized cost $ 2,559,271 $ 2,405,612
Available-for-sale securities, fair value:    
Estimated market value 2,743,151 2,653,539
US Treasury Securities [Member]    
Available-for-sale securities, amortized cost:    
Due in one year or less 69,891 90,142
Due after one year through five years 572,812 562,442
Due after five years through ten years 677,891 672,733
Due after ten years 1,075,247 905,567
Amortized cost 2,395,841 2,230,884
Available-for-sale securities, fair value:    
Due in one year or less 71,172 91,190
Due after one year through five years 609,255 601,818
Due after five years through ten years 745,523 754,536
Due after ten years 1,143,769 1,019,570
Estimated market value 2,569,719 2,467,114
Mortgage-backed securities [Member]    
Available-for-sale securities, amortized cost:    
Amortized cost 163,430 174,728
Available-for-sale securities, fair value:    
Estimated market value $ 173,432 $ 186,425
v3.22.0.1
Investments (Available for sale equity investments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Marketable Securities [Abstract]    
Amortized cost, equity investments $ 35,829 $ 29,809
Estimated market value, equity investments 52,291 42,117
Common stocks [Member]    
Marketable Securities [Abstract]    
Amortized cost, equity investments 9,775 9,775
Estimated market value, equity investments 24,179 20,440
Non-redeemable preferred stocks [Member]    
Marketable Securities [Abstract]    
Amortized cost, equity investments 26,054 20,034
Estimated market value, equity investments $ 28,112 $ 21,677
v3.22.0.1
Borrowings (Narratives) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Mar. 31, 2021
Debt instruments, face, payment, and remaining balance amount:            
Notes, loans and leases payable $ 5,397,856   $ 5,397,856     $ 4,668,907
Interest paid related to derivative contracts [Abstract]            
Interest paid in cash 35,400 $ 38,400 $ 106,900 $ 116,900    
Real estate loan [Member]            
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year     2023      
Real estate loans (revolving credit) [Member]            
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year     2025      
Finance Lease [Member]            
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year     2029      
Finance Lease [Member] | AMERCO [Member]            
Lease Cost [Abstract]            
Sale Leaseback Transaction Lease Terms     (7) year terms      
Finance Lease [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Capitalized assets, net book value $ 692,800   $ 692,800      
Finance Lease [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 5.04%   5.04%      
Debt instruments, face, payment, and remaining balance amount:            
Capitalized assets, net book value $ 877,000   $ 877,000      
Capital Lease Obligations [Member] | AMERCO [Member]            
Lease Cost [Abstract]            
Sale Leaseback Transaction Lease Terms     (7) years      
Capital Lease Obligations [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.60%   1.60%      
Capital Lease Obligations [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 4.22%   4.22%      
Private Placement [Member] | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Amounts held at LIBOR plus margin $ 100,000   $ 100,000   $ 150,000  
New capital lease obligiations, amount 600,000   $ 600,000      
Line of credit facility increase, amount $ 150,000          
Private Placement [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 2.55%   2.55%   2.43%  
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year 2030          
Private Placement [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 2.88%   2.88%   2.78%  
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year 2035          
Other Obligations [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.50%   1.50%      
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year     2022      
Other Obligations [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 8.00%   8.00%      
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year     2049      
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.50%   1.50%      
Sum of LIBOR and margin, maximum rate 1.61%   1.61%      
Amerco Real Estate Company [Member] | Rental Truck (amortizing loans) First Loan [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.61%   1.61%      
Amerco Real Estate Company [Member] | Rental Truck (amortizing loans) First Loan [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 4.66%   4.66%      
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%   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%   5.50%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Line of credit, current borrowing capacity $ 385,000   $ 385,000      
Notes, loans and leases payable $ 385,000   $ 385,000      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.25%   1.25%      
Sum of LIBOR and margin, maximum rate 1.34%   1.34%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.50%   1.50%      
Sum of LIBOR and margin, maximum rate 1.59%   1.59%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Line of credit facility, maximum borrowing capacity $ 375,000   $ 375,000      
Line of credit, current borrowing capacity 590,000   590,000      
Notes, loans and leases payable $ 550,000   $ 550,000      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, effective percentage:            
LIBOR 0.09%   0.09%      
Applicable margin interest rate 1.15%   1.15%      
Sum of LIBOR and margin, maximum rate 1.25%   1.25%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, effective percentage:            
LIBOR 0.10%   0.10%      
Applicable margin interest rate 1.25%   1.25%      
Sum of LIBOR and margin, maximum rate 1.34%   1.34%      
Uhaul Intl and Subsidiaries [Member] | Real estate loans (revolving credit) [Member] | AMERCO [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.38%   1.38%      
Sum of LIBOR and margin, maximum rate 1.47%   1.47%      
Unused capacity fee     0.30%      
Debt instruments, face, payment, and remaining balance amount:            
Line of credit facility, maximum borrowing capacity $ 300,000   $ 300,000      
Line of credit, current borrowing capacity 200,000   200,000      
Line of credit facility, remaining borrowing capacity $ 150,000   $ 150,000      
Uhaul Intl and Subsidiaries [Member] | Real estate loans (revolving credit) [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, effective percentage:            
LIBOR 0.09%   0.09%      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Debt instrument, face amount $ 90,100   $ 90,100      
Subsidiary holdings of parent company debt $ 2,300   $ 2,300      
Life Insurance [Member] | Other Obligations [Member] | Federal Home Loan Bank [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Aggregate deposit amount         $ 60,000  
Available for sale equity securities, noncurrent         110,000  
Available for sale equity securities pledged as collateral         $ 66,500  
Life Insurance [Member] | Other Obligations [Member] | Federal Home Loan Bank [Member] | Minimum [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Deposit interest rate         0.49%  
Life Insurance [Member] | Other Obligations [Member] | Federal Home Loan Bank [Member] | Maximum [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Deposit interest rate         1.72%  
v3.22.0.1
Borrowings (Long-term Debt Borrowings) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Debt instrument, maturities:    
Debt Instrument Carrying Amount $ 5,196,104 $ 4,449,691
Notes, loans and finance/capital leases payable 5,431,361 4,698,615
Less: Debt issuance costs (33,505) (29,708)
Total notes, loans and finance/capital leases payable, net $ 5,397,856 4,668,907
Real estate loan (amortizing term) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year 2023  
Debt Instrument Carrying Amount $ 51,925 82,913
Real estate loan (amortizing term) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.61%  
Senior Mortgages [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2022  
Debt instrument, maturity year range, end 2042  
Debt Instrument Carrying Amount $ 2,199,110 2,125,324
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 2025  
Debt instrument, maturity year range, start 2023  
Debt Instrument Carrying Amount $ 535,000 535,000
Real estate loans (revolving credit) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.34%  
Real estate loans (revolving credit) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 3.14%  
Fleet loans (amortizing term) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2022  
Debt instrument, maturity year range, end 2028  
Debt Instrument Carrying Amount $ 136,790 176,295
Fleet loans (amortizing term) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.61%  
Fleet loans (amortizing term) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 4.66%  
Fleet loans (revolving credit) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2024  
Debt instrument, maturity year range, end 2026  
Debt Instrument Carrying Amount $ 550,000 535,000
Fleet loans (revolving credit) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.25%  
Fleet loans (revolving credit) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.36%  
Capital Leases (rental equipment) [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2022  
Debt instrument, maturity year range, end 2026  
Debt Instrument Carrying Amount $ 384,505 513,623
Capital Leases (rental equipment) [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.92%  
Capital Leases (rental equipment) [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 5.04%  
Finance capital lease [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year 2029  
Debt instrument, maturity year range, start 2024  
Debt Instrument Carrying Amount $ 886,254 644,375
Finance capital lease [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 1.60%  
Finance capital lease [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 4.22%  
Private Placement [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2029  
Debt instrument, maturity year range, end 2033  
Debt Instrument Carrying Amount $ 600,000 0
Private Placement [Member] | Minimum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.43%  
Private Placement [Member] | Maximum [Member]    
Debt instruments, interest rate, stated percentage:    
Debt instrument, interest rate, stated percentage 2.78%  
Other Obligations [Member]    
Debt instrument, maturities:    
Debt instrument, maturity year range, start 2022  
Debt instrument, maturity year range, end 2049  
Debt Instrument Carrying Amount $ 87,777 $ 86,085
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%  
v3.22.0.1
Borrowings (Annual Maturities of Notes, Loans and Leases Payable) (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Long-term debt, by Maturity:  
2021 $ 515,591
2022 611,940
2023 1,084,053
2024 539,695
2025 661,676
Thereafter $ 2,018,406
v3.22.0.1
Borrowings (Components of Interest Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Interest expense, borrowings:        
Interest expense $ 43,850 $ 41,371 $ 122,589 $ 124,882
Capitalized interest (2,222) (2,105) (6,974) (10,033)
Amortization of transaction costs 1,407 1,890 4,153 4,645
Interest expense resulting from derivatives 1,007 972 2,997 2,680
Total interest expense 44,042 42,128 122,765 122,174
Fees on early extinguishment of debt 956 0 956 0
Total $ 44,998 $ 42,128 $ 123,721 $ 122,174
v3.22.0.1
Borrowings (Interest Rates and Company Borrowings) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Interest and debt expense:        
Weighted average interest rate during the quarter 1.38% 1.66% 1.38% 1.65%
Interest rate at quarter end 1.39% 1.65% 1.39% 1.65%
Maximum amount outstanding during the quarter $ 1,085,000 $ 1,082,000 $ 1,093,000 $ 1,175,000
Average amount outstanding during the quarter 1,081,283 1,057,380 1,081,571 1,092,382
Facility fees $ 66 $ 91 $ 198 $ 185
v3.22.0.1
Derivatives (Narratives) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Mar. 31, 2021
AOCI Attributable To Parent [Abstract]            
Interest expense $ 44,042 $ 42,128 $ 122,765 $ 122,174    
Derivative Fair Value Of Derivative Net [Abstract]            
Derivative hedges, net market value 0   0     $ 0
Decrease, fair value, cash flow hedges            
AOCI Attributable To Parent [Abstract]            
Interest expense     100      
Reclassified AOCI            
AOCI Attributable To Parent [Abstract]            
Interest expense     2,300      
Interest rate contracts            
AOCI Attributable To Parent [Abstract]            
Interest expense     2,300      
Investments, other            
Derivative Fair Value Of Derivative Net [Abstract]            
Derivative hedges, net market value 6,600   6,600   $ 6,600  
Derivative hedges, notional amount $ 282,700   $ 282,700   $ 399,100  
v3.22.0.1
Derivatives (Interest rate contracts designated as hedging instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Interest Rate Fair Value Hedges [Abstract]    
Assets $ 0 $ 0
Liabilities 2,051 5,141
Notional amount (debt) $ 235,000 $ 235,000
v3.22.0.1
Derivatives (Effect of Interest Rate Contracts on the Statement of Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
The effect of interest rate contracts on the statement of operations:    
(Gain) loss recognized in AOCI on interest rate contracts (effective portion) $ (1,242) $ (1,007)
(Gain) loss reclassified from AOCI into income $ (1,007) $ (972)
v3.22.0.1
Comprehensive Income (Loss) (Accumulated other comprehensive income (loss) components of net of tax) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     $ 106,857  
Foreign currency translation $ 112 $ (2,566) (2,288) $ (5,193)
Unrealized net gain on investments (11,992) 9,560 (43,637) 54,900
Change in fair value of cash flow hedges 178 26 71 (471)
Amount reclassified from AOCI 759 734 2,261 2,022
Other comprehensive income (loss) (10,943) 7,754 (43,593) 51,258
Balance as of December 31, 2020 63,264   63,264  
Foreign Currency Translation [Member]        
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     (52,929)  
Foreign currency translation     (2,288)  
Unrealized net gain on investments     0  
Change in fair value of cash flow hedges     0  
Amount reclassified from AOCI     0  
Other comprehensive income (loss)     (2,288)  
Balance as of December 31, 2020 (55,217)   (55,217)  
Unrealized Net Gain on Investments [Member]        
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     167,653  
Foreign currency translation     0  
Unrealized net gain on investments     (43,637)  
Change in fair value of cash flow hedges     0  
Amount reclassified from AOCI     0  
Other comprehensive income (loss)     (43,637)  
Balance as of December 31, 2020 124,016   124,016  
Fair Market Value of Cash Flow Hedges [Member]        
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     (3,879)  
Foreign currency translation     0  
Unrealized net gain on investments     0  
Change in fair value of cash flow hedges     71  
Amount reclassified from AOCI     2,261  
Other comprehensive income (loss)     2,332  
Balance as of December 31, 2020 (1,547)   (1,547)  
Postretirement Benefit Obligation Gain [Member]        
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     (3,988)  
Foreign currency translation     0  
Unrealized net gain on investments     0  
Change in fair value of cash flow hedges     0  
Amount reclassified from AOCI     0  
Other comprehensive income (loss)     0  
Balance as of December 31, 2020 (3,988)   (3,988)  
Accumulated Other Comprehensive Income (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     106,857  
Foreign currency translation 112 (2,566) (2,288) (5,193)
Unrealized net gain on investments (11,992) 9,560 (43,637) 54,900
Change in fair value of cash flow hedges 178 26 71 (471)
Amount reclassified from AOCI 759 $ 734 2,261 $ 2,022
Other comprehensive income (loss)     (43,593)  
Balance as of December 31, 2020 $ 63,264   $ 63,264  
v3.22.0.1
Stockholders' Equity (Narratives) (Details)
 9 Months Ended
Dec. 31, 2021
$ / shares
Dividends Stock [Abstract]  
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
Dividends Declared Two [Member]  
Dividends Stock [Abstract]  
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 Three [Member]  
Dividends Stock [Abstract]  
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
v3.22.0.1
Leases (Narratives) (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Leases [Abstract]    
Right Of Use Asset Obtained In Exchange For Operating Lease Liability $ 384.5 $ 513.6
Right Of Use Asset Obtained In Exchange For Finance Lease Liability 79.3 92.5
Cash paid for operating leases 22.6 22.0
Cash paid for finance leases $ 129.2 $ 173.5
v3.22.0.1
Leases (Components of our right-of-use assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Finance Lease [Abstract]    
Buildings and Improvements $ 136,213 $ 132,901
Furniture and equipment 14,732 22,316
Rental trailers and other rental equipment 173,940 203,594
Rental trucks 1,243,830 1,494,098
Right-of-use assets, gross 1,568,715 1,852,909
Less: Accumulated depreciation (796,451) (883,366)
Right of use assets, net 772,264 969,543
Finance Lease [Member]    
Finance Lease [Abstract]    
Buildings and Improvements 0 0
Furniture and equipment 14,732 22,316
Rental trailers and other rental equipment 173,940 203,594
Rental trucks 1,243,830 1,494,098
Right-of-use assets, gross 1,432,502 1,720,008
Less: Accumulated depreciation (739,688) (842,970)
Right of use assets, net 692,814 877,038
Operating Lease [Member]    
Finance Lease [Abstract]    
Buildings and Improvements 136,213 132,901
Furniture and equipment 0 0
Rental trailers and other rental equipment 0 0
Rental trucks 0 0
Right-of-use assets, gross 136,213 132,901
Less: Accumulated depreciation (56,763) (40,396)
Right of use assets, net $ 79,450 $ 92,505
v3.22.0.1
Leases (Finance Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Finance Leases Weighted Average Remaining Lease Term And Discount Rate [Abstract]    
Remaining Lease Term Finance Lease Weighted Average 3 3
Finance Lease Weighted Average Discount Rate Percent 3.70% 3.60%
v3.22.0.1
Leases (Operating Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Operating Leases Remaining Lease Term And Weighted Average Discount Rate [Abstract]    
Remaining Lease Term Operating Lease Weighted Average 16 14.7
Operating Lease Weighted Average Discount Rate Percent 4.60% 4.60%
v3.22.0.1
Leases (Components Of Lease Expense) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Lease cost:    
Operating lease costs $ 24,018 $ 22,564
Cash Flow Financing Activities Lessee [Abstract]    
Amortization of right of use assets 90,056 116,002
Interest on lease liabilities 14,290 17,448
Total finance lease cost $ 104,346 $ 133,450
v3.22.0.1
Leases (Maturities of lease liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Finance Lease Liabilities Payments Due [Abstract]    
2021 $ 142,702  
2022 122,157  
2023 85,912  
2024 48,427  
2025 12,197  
Thereafter 0  
Total lease payments 411,395  
Less: imputed interest (26,890)  
Financing lease liability 384,505  
Operating Lease Liabilities Payments Due [Abstract]    
2021 23,774  
2022 22,123  
2023 14,404  
2024 4,974  
2025 3,135  
Thereafter 60,040  
Total lease payments 128,450  
Less: inputed interest (49,116)  
Operating lease liability $ 79,334 $ 92,510
v3.22.0.1
Contingencies (Narratives) (Details)
$ in Millions
 9 Months Ended
Dec. 31, 2021
USD ($)
Covid 19 pandemic  
Unusual Or Infrequent Item Net Gain Loss [Abstract]  
CARES act, estimated refund amount $ 366.0
v3.22.0.1
Related Party Transactions (Narratives) (Details) - USD ($)
$ in Millions
 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member]    
Property Management Fee [Abstract]    
Property Management Fee Revenue $ 27.1 $ 24.5
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Minimum [Member]    
Property Management Fee [Abstract]    
Management fee rate 4.00%  
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] | Maximum [Member]    
Property Management Fee [Abstract]    
Management fee rate 10.00%  
Sac Holdings, Four Sac, Five Sac, Galaxy, and Private Mini [Member]    
Related party costs and expenses:    
Revenue, excluding dealer agreement commissions and expenses $ 21.6  
Expenses, related parties 1.8  
Cash flow, related party 19.8  
Revenue generated by the dealer agreement from related parties 335.3  
Commission expenses, generated from dealer agreement with related parties $ 70.5  
v3.22.0.1
Related Party Transactions (Related Party Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Related party transactions:        
Management fee revenue $ 9,651 $ 8,765 $ 26,847 $ 23,952
Revenue from related parties 9,651 8,765 26,847 23,952
Blackwater [Member]        
Related party transactions:        
Management fee revenue 6,972 6,350 21,580 19,142
Mercury [Member]        
Related party transactions:        
Management fee revenue $ 2,679 $ 2,415 $ 5,267 $ 4,810
v3.22.0.1
Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Related party cost and expense:        
Related party expenses, total $ 21,690 $ 18,757 $ 72,343 $ 55,937
Blackwater [Member]        
Related party cost and expense:        
U-Haul lease expenses 604 658 1,841 1,973
U-Haul commission expenses $ 21,086 $ 18,099 $ 70,502 $ 53,964
v3.22.0.1
Related Party Transactions (Related Party Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Related party assets:    
Related party assets $ 56,231 $ 35,395
Blackwater [Member]    
Related party assets:    
Notes receivable 45,804 27,116
Mercury [Member]    
Related party assets:    
Notes receivable 9,845 9,632
Insurance Group [Member]    
Related party assets:    
Amount due to related parties $ 582 $ (1,353)
v3.22.0.1
Consolidating financial information by industry segment (Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
ASSETS:        
Cash and cash equivalents $ 2,327,462 $ 1,194,012 $ 1,398,840 $ 494,352
Reinsurance recoverables and trade receivables, net 230,437 224,426    
Inventories, net 166,588 105,577    
Prepaid expenses 211,449 469,144    
Investments, fixed maturities and marketable equities 2,795,442 2,695,656    
Investments, other 602,371 489,759    
Deferred policy acquisition costs, net 101,770 89,749    
Other assets 41,146 47,730    
Right of use Assets - Financing 692,814 877,038    
Right of use Assets - Operating 79,450 92,505    
Related party assets 56,231 35,395    
Subtotal assets 7,305,160 6,320,991    
Investments in subsidiaries 0 0    
Property, plant and equipment, at cost:        
Land 1,264,742 1,075,813    
Buildings and improvements 5,726,481 5,163,705    
Furniture and equipment 841,957 786,505    
Property, plant and equipment (gross) 12,827,443 11,413,668    
Less: Accumulated depreciation (3,544,525) (3,083,053)    
Total property, plant and equipment 9,282,918 8,330,615    
Total assets 16,588,078 14,651,606 14,447,305  
Liabilities:        
Accounts payable and accrued expenses 634,795 645,575    
Notes, loans and leases payable 5,397,856 4,668,907    
Financing lease liability 384,505      
Operating lease liability 79,334 92,510    
Policy benefits and losses, claims and loss expenses payable 1,003,895 997,701    
Liabilities from investment contracts 2,302,591 2,161,530    
Other policyholders' funds and liabilities 9,610 12,420    
Deferred income 43,352 42,592    
Deferred income taxes, net 1,301,229 1,178,489    
Related party liabilities 0 0    
Total liabilities 10,772,662 9,799,724    
Stockholders' equity:        
Additional paid-in capital 453,819 453,819    
Accumulated other comprehensive loss 63,264 106,857    
Retained earnings 5,965,486 4,958,359    
Total stockholders' equity 5,815,416 4,851,882    
Total liabilities and stockholders' equity 16,588,078 14,651,606    
Rental Trailers and Other Rental Equipment [Member]        
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 569,150 477,921    
Rental Trucks [Member]        
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 4,425,113 3,909,724    
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    
Serial 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 2,254,215 1,010,275 1,250,267 459,078
Reinsurance recoverables and trade receivables, net 127,753 118,741    
Inventories, net 166,588 105,577    
Prepaid expenses 211,449 469,144    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 20,766 20,733    
Deferred policy acquisition costs, net 0 0    
Other assets 37,916 44,763    
Right of use Assets - Financing 692,814 877,038    
Right of use Assets - Operating 79,211 92,245    
Related party assets 71,882 54,042    
Subtotal assets 3,662,594 2,792,558    
Investments in subsidiaries 736,500 741,860    
Property, plant and equipment, at cost:        
Land 1,264,742 1,075,813    
Buildings and improvements 5,726,481 5,163,705    
Furniture and equipment 841,957 786,505    
Property, plant and equipment (gross) 12,827,443 11,413,668    
Less: Accumulated depreciation (3,544,525) (3,083,053)    
Total property, plant and equipment 9,282,918 8,330,615    
Total assets 13,682,012 11,865,033    
Liabilities:        
Accounts payable and accrued expenses 625,504 636,257    
Notes, loans and leases payable 5,397,856 4,657,720    
Operating lease liability 79,086 92,236    
Policy benefits and losses, claims and loss expenses payable 428,029 427,073    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 43,352 42,592    
Deferred income taxes, net 1,271,449 1,136,149    
Related party liabilities 25,145 25,413    
Total liabilities 7,870,421 7,017,440    
Stockholders' equity:        
Additional paid-in capital 454,029 454,029    
Accumulated other comprehensive loss 59,439 102,568    
Retained earnings 5,965,276 4,958,149    
Total stockholders' equity 5,811,591 4,847,593    
Total liabilities and stockholders' equity 13,682,012 11,865,033    
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 569,150 477,921    
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 4,425,113 3,909,724    
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] | Serial 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 8,065 5,658 7,046 4,794
Reinsurance recoverables and trade receivables, net 65,502 67,069    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 285,212 295,753    
Investments, other 118,936 90,412    
Deferred policy acquisition costs, net 0 0    
Other assets 575 436    
Right of use Assets - Financing 0 0    
Right of use Assets - Operating 123 92    
Related party assets 7,674 6,854    
Subtotal assets 486,087 466,274    
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 486,087 466,274    
Liabilities:        
Accounts payable and accrued expenses 3,687 2,029    
Notes, loans and leases payable 0 0    
Operating lease liability 124 96    
Policy benefits and losses, claims and loss expenses payable 176,955 178,942    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 3,759 3,698    
Deferred income 0 0    
Deferred income taxes, net 12,702 13,046    
Related party liabilities 3,414 5,821    
Total liabilities 200,641 203,632    
Stockholders' equity:        
Additional paid-in capital 91,120 91,120    
Accumulated other comprehensive loss 18,405 22,546    
Retained earnings 172,620 145,675    
Total stockholders' equity 285,446 262,642    
Total liabilities and stockholders' equity 486,087 466,274    
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] | Serial 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 65,182 178,079 141,527 30,480
Reinsurance recoverables and trade receivables, net 37,182 38,616    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 2,510,230 2,399,903    
Investments, other 462,669 378,614    
Deferred policy acquisition costs, net 101,770 89,749    
Other assets 2,655 2,531    
Right of use Assets - Financing 0 0    
Right of use Assets - Operating 116 168    
Related party assets 14,289 13,850    
Subtotal assets 3,194,093 3,101,510    
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 3,194,093 3,101,510    
Liabilities:        
Accounts payable and accrued expenses 5,604 7,289    
Notes, loans and leases payable 0 11,187    
Operating lease liability 124 178    
Policy benefits and losses, claims and loss expenses payable 398,911 391,686    
Liabilities from investment contracts 2,302,591 2,161,530    
Other policyholders' funds and liabilities 5,851 8,722    
Deferred income 0 0    
Deferred income taxes, net 17,078 29,294    
Related party liabilities 12,880 12,406    
Total liabilities 2,743,039 2,622,292    
Stockholders' equity:        
Additional paid-in capital 26,271 26,271    
Accumulated other comprehensive loss 101,787 140,817    
Retained earnings 320,496 309,630    
Total stockholders' equity 451,054 479,218    
Total liabilities and stockholders' equity 3,194,093 3,101,510    
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] | Serial 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    
Consolidation, Eliminations [Member]        
ASSETS:        
Cash and cash equivalents 0 0 $ 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 0 0    
Right of use Assets - Operating 0 0    
Related party assets (37,614) (39,351)    
Subtotal assets (37,614) (39,351)    
Investments in subsidiaries (736,500) (741,860)    
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 (774,114) (781,211)    
Liabilities:        
Accounts payable and accrued expenses 0 0    
Notes, loans and leases payable 0 0    
Operating lease liability 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, net 0 0    
Related party liabilities (41,439) (43,640)    
Total liabilities (41,439) (43,640)    
Stockholders' equity:        
Additional paid-in capital (117,601) (117,601)    
Accumulated other comprehensive loss (116,367) (159,074)    
Retained earnings (492,906) (455,095)    
Total stockholders' equity (732,675) (737,571)    
Total liabilities and stockholders' equity (774,114) (781,211)    
Consolidation, 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    
Consolidation, Eliminations [Member] | Rental Trucks [Member]        
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Consolidation, Eliminations [Member] | Series A Preferred Stock [Member]        
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Consolidation, Eliminations [Member] | Series B Preferred Stock [Member]        
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Consolidation, Eliminations [Member] | Serial Common Stock [Member]        
Stockholders' equity:        
Common stock, value, issued 0 0    
Consolidation, Eliminations [Member] | Amerco Common Stock [Member]        
Stockholders' equity:        
Common stock, value, issued (5,801) (5,801)    
Consolidation, Eliminations [Member] | Common Stock in Treasury [Member]        
Stockholders' equity:        
Treasury stock, value 0 0    
Consolidation, Eliminations [Member] | Preferred Stock in Treasury [Member]        
Stockholders' equity:        
Treasury stock, value $ 0 $ 0    
v3.22.0.1
Consolidating financial information by industry segment (Statements of Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Revenues:        
Self-moving equipment rentals $ 975,552 $ 808,215 $ 3,189,990 $ 2,393,530
Self-storage revenues 159,424 123,024 450,302 347,252
Self moving and self-storage products and service sales 75,402 74,586 272,478 264,564
Property management fees 9,651 8,765 26,847 23,952
Life insurance premiums 27,010 29,993 84,628 91,958
Property and casualty insurance premiums 25,618 19,933 64,986 49,536
Net investment and interest income 31,184 35,580 102,963 85,895
Other revenue 100,495 69,886 349,252 225,440
Total revenues 1,404,336 1,169,982 4,541,446 3,482,127
Costs and expenses:        
Operating expenses 658,095 539,942 1,968,698 1,606,687
Commission expenses 105,155 86,891 346,200 255,431
Cost of sales 57,042 45,752 193,448 159,516
Benefits and losses 47,266 45,631 139,194 130,660
Amortization of deferred policy acquisition costs 7,947 6,572 23,520 19,012
Lease expense 7,394 7,522 22,482 20,995
Depreciation, net of (gains) losses on disposals 103,736 152,602 361,201 455,711
Net (gains) losses on disposal of real estate 977 1,124 (2,930) 4,293
Total costs and expenses 987,612 886,036 3,051,813 2,652,305
Earnings (loss) from operations before equity in earnings of subsidiaries 416,724 283,946 1,489,633 829,822
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 416,724 283,946 1,489,633 829,822
Other components of net periodic benefit costs (280) (247) (840) (740)
Interest expense (44,042) (42,128) (122,765) (122,174)
Fees on early extinguishment of debt (956) 0 (956) 0
Pretax earnings 371,446 241,571 1,365,072 706,908
Income tax expense (89,980) (58,586) (328,533) (169,832)
Earnings available to common stockholders 281,466 182,985 1,036,539 537,076
Operating Segments [Member] | Moving and Storage Consolidations [Member]        
Revenues:        
Self-moving equipment rentals 977,052 809,371 3,193,594 2,396,098
Self-storage revenues 159,424 123,024 450,302 347,252
Self moving and self-storage products and service sales 75,402 74,586 272,478 264,564
Property management fees 9,651 8,765 26,847 23,952
Life insurance premiums 0 0 0 0
Property and casualty insurance premiums 0 0 0 0
Net investment and interest income 666 524 2,021 1,781
Other revenue 99,385 69,011 346,591 223,252
Total revenues 1,321,580 1,085,281 4,291,833 3,256,899
Costs and expenses:        
Operating expenses 642,900 526,884 1,927,060 1,569,763
Commission expenses 105,155 86,891 346,200 255,431
Cost of sales 57,042 45,752 193,448 159,516
Benefits and losses 0 0 0 0
Amortization of deferred policy acquisition costs 0 0 0 0
Lease expense 7,917 8,024 24,018 22,564
Depreciation, net of (gains) losses on disposals 103,736 152,602 361,201 455,711
Net (gains) losses on disposal of real estate 977 1,124 (2,930) 4,293
Total costs and expenses 917,727 821,277 2,848,997 2,467,278
Earnings (loss) from operations before equity in earnings of subsidiaries 403,853 264,004 1,442,836 789,621
Equity in earnings of subsidiaries 10,403 16,117 37,811 32,850
Earnings from operations 414,256 280,121 1,480,647 822,471
Other components of net periodic benefit costs (280) (247) (840) (740)
Interest expense (44,311) (42,401) (123,568) (122,995)
Fees on early extinguishment of debt (956)   (956)  
Pretax earnings 368,709 237,473 1,355,283 698,736
Income tax expense (87,243) (54,488) (318,744) (161,660)
Earnings available to common stockholders 281,466 182,985 1,036,539 537,076
Operating Segments [Member] | Property and Casualty Insurance [Member]        
Revenues:        
Self-moving equipment rentals 0 0 0 0
Self-storage revenues 0 0 0 0
Self moving and self-storage products and service sales 0 0 0 0
Property management fees 0 0 0 0
Life insurance premiums 0 0 0 0
Property and casualty insurance premiums 26,477 20,706 67,277 51,934
Net investment and interest income 3,343 5,934 15,538 11,013
Other revenue 0 0 0 0
Total revenues 29,820 26,640 82,815 62,947
Costs and expenses:        
Operating expenses 12,198 10,072 31,779 27,063
Commission expenses 0 0 0 0
Cost of sales 0 0 0 0
Benefits and losses 7,892 4,908 16,679 11,376
Amortization of deferred policy acquisition costs 0 0 0 0
Lease expense 73 169 279 170
Depreciation, net of (gains) losses on disposals 0 0 0 0
Net (gains) losses on disposal of real estate 0 0 0 0
Total costs and expenses 20,163 15,149 48,737 38,609
Earnings (loss) from operations before equity in earnings of subsidiaries 9,657 11,491 34,078 24,338
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 9,657 11,491 34,078 24,338
Other components of net periodic benefit costs 0 0 0 0
Interest expense 0 0 0 0
Fees on early extinguishment of debt 0   0  
Pretax earnings 9,657 11,491 34,078 24,338
Income tax expense (2,027) (2,405) (7,133) (5,121)
Earnings available to common stockholders 7,630 9,086 26,945 19,217
Operating Segments [Member] | Life Insurance [Member]        
Revenues:        
Self-moving equipment rentals 0 0 0 0
Self-storage revenues 0 0 0 0
Self moving and self-storage products and service sales 0 0 0 0
Property management fees 0 0 0 0
Life insurance premiums 27,010 29,993 84,628 91,958
Property and casualty insurance premiums 0 0 0 0
Net investment and interest income 28,182 30,092 88,448 75,749
Other revenue 1,225 992 2,985 2,583
Total revenues 56,417 61,077 176,061 170,290
Costs and expenses:        
Operating expenses 5,465 5,027 16,063 15,208
Commission expenses 0 0 0 0
Cost of sales 0 0 0 0
Benefits and losses 39,374 40,723 122,515 119,284
Amortization of deferred policy acquisition costs 7,947 6,572 23,520 19,012
Lease expense 28 31 81 102
Depreciation, net of (gains) losses on disposals 0 0 0 0
Net (gains) losses on disposal of real estate 0 0 0 0
Total costs and expenses 52,814 52,353 162,179 153,606
Earnings (loss) from operations before equity in earnings of subsidiaries 3,603 8,724 13,882 16,684
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 3,603 8,724 13,882 16,684
Other components of net periodic benefit costs 0 0 0 0
Interest expense (120) 0 (360) 0
Fees on early extinguishment of debt 0   0  
Pretax earnings 3,483 8,724 13,522 16,684
Income tax expense (710) (1,693) (2,656) (3,051)
Earnings available to common stockholders 2,773 7,031 10,866 13,633
Consolidation, Eliminations [Member]        
Revenues:        
Self-moving equipment rentals (1,500) (1,156) (3,604) (2,568)
Self-storage revenues 0 0 0 0
Self moving and self-storage products and service sales 0 0 0 0
Property management fees 0 0 0 0
Life insurance premiums 0 0 0 0
Property and casualty insurance premiums (859) (773) (2,291) (2,398)
Net investment and interest income (1,007) (970) (3,044) (2,648)
Other revenue (115) (117) (324) (395)
Total revenues (3,481) (3,016) (9,263) (8,009)
Costs and expenses:        
Operating expenses (2,468) (2,041) (6,204) (5,347)
Commission expenses 0 0 0 0
Cost of sales 0 0 0 0
Benefits and losses 0 0 0 0
Amortization of deferred policy acquisition costs 0 0 0 0
Lease expense (624) (702) (1,896) (1,841)
Depreciation, net of (gains) losses on disposals 0 0 0 0
Net (gains) losses on disposal of real estate 0 0 0 0
Total costs and expenses (3,092) (2,743) (8,100) (7,188)
Earnings (loss) from operations before equity in earnings of subsidiaries (389) (273) (1,163) (821)
Equity in earnings of subsidiaries (10,403) (16,117) (37,811) (32,850)
Earnings from operations (10,792) (16,390) (38,974) (33,671)
Other components of net periodic benefit costs 0 0 0 0
Interest expense 389 273 1,163 821
Fees on early extinguishment of debt 0   0  
Pretax earnings (10,403) (16,117) (37,811) (32,850)
Income tax expense 0 0 0 0
Earnings available to common stockholders $ (10,403) $ (16,117) $ (37,811) $ (32,850)
v3.22.0.1
Consolidating financial information by industry segment (Cash Flow Statements) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Cash flow from operating activities:        
Net earnings $ 281,466 $ 182,985 $ 1,036,539 $ 537,076
Earnings from consolidated entities     0 0
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     519,181 495,794
Amortization of deferred policy acquisition costs 7,947 6,572 23,520 19,012
Amortization of premiums and accretion of discounts related to investments, net     14,486 10,197
Amortization of debt issuance costs     4,200 4,645
Interest credited to policyholders     47,181 38,672
Change in allowance for losses on trade receivables     1,243 (574)
Change in allowance for inventory reserves     9,799 3,259
Net gain on sale of real and personal property     (157,980) (40,083)
Net losses on disposal of real estate 977 1,124 (2,930) 4,293
Net (gain) loss on sale of investments     (3,495) (5,644)
Net losses on equity investments     (3,695) 669
Deferred income tax     130,760 117,025
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     (7,371) (39,499)
Inventories     (70,796) (6,349)
Prepaid expenses     257,591 112,428
Capitalization of deferred policy acquisition costs     (25,703) (24,903)
Other assets     1,178 30,120
Related party assets     (18,683) (20,794)
Accounts payable and accrued expenses     33,258 97,151
Policy benefits and losses, claims and loss expenses payable     6,411 14,096
Other policyholders' funds and liabilities     (2,810) 24,677
Deferred income     (526) 6,851
Related party liabilities     (2,207) (1,566)
Net cash provided by operating activities     1,789,151 1,376,553
Cash flow from investing activities:        
Escrow deposits     5,695 (1,978)
Purchase of:        
Property, plant and equipment     (1,652,984) (961,995)
Short term investments     (31,074) (38,790)
Fixed maturity investments     (448,283) (352,307)
Equity securities     (1,380) (838)
Preferred stock     (8,000) (16,144)
Real estate     (190) (274)
Mortgage loans     (131,633) (92,281)
Proceeds from sale of:        
Property, plant and equipment     483,783 434,860
Short term investments     20,669 38,830
Fixed maturity investments     284,347 331,407
Equity securities     2,026 72
Preferred stock     2,000 1,200
Mortgage loans     28,064 4,744
Net cash used by investing activities     (1,446,960) (653,494)
Cash flow from financing activities:        
Borrowings from credit facilities     1,202,412 790,532
Principal repayments on credit facilities     (333,419) (568,068)
Payment of debt issuance costs     (8,006) (5,020)
Capital lease payments     (129,150) (173,520)
Securitization deposits       (49,019)
Common stock dividends paid     (29,412) (49,019)
Net contribution from (to) related party     0 22,600
Investment contract deposits     271,657 326,055
Investment contract withdrawals     (177,777) (169,008)
Net cash provided by (used in) financing activities     796,305 174,552
Effects of exchange rate on cash     (5,046) 6,877
Increase (decrease) in cash and cash equivalents     1,133,450 904,488
Cash and cash equivalents at the beginning of period     1,194,012 494,352
Cash and cash equivalents at the end of the period 2,327,462 1,398,840 2,327,462 1,398,840
Operating Segments [Member] | Moving and Storage Consolidations [Member]        
Cash flow from operating activities:        
Net earnings 281,466 182,985 1,036,539 537,076
Earnings from consolidated entities     (37,811) (32,850)
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     519,181 495,794
Amortization of deferred policy acquisition costs 0 0 0 0
Amortization of premiums and accretion of discounts related to investments, net     0 0
Amortization of debt issuance costs     4,200 4,645
Interest credited to policyholders     0 0
Change in allowance for losses on trade receivables     1,413 (573)
Change in allowance for inventory reserves     9,799 3,259
Net gain on sale of real and personal property     (157,980) (40,083)
Net losses on disposal of real estate 977 1,124 (2,930) 4,293
Net (gain) loss on sale of investments     0 0
Net losses on equity investments     0 0
Deferred income tax     134,541 116,099
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     (10,403) (39,327)
Inventories     (70,796) (6,349)
Prepaid expenses     257,591 112,428
Capitalization of deferred policy acquisition costs     0 0
Other assets     1,213 30,337
Related party assets     (17,870) (20,643)
Accounts payable and accrued expenses     30,634 96,269
Policy benefits and losses, claims and loss expenses payable     1,172 10,526
Other policyholders' funds and liabilities     0 0
Deferred income     687 5,483
Related party liabilities     (267) 749
Net cash provided by operating activities     1,698,913 1,277,133
Cash flow from investing activities:        
Escrow deposits     5,695 (1,978)
Purchase of:        
Property, plant and equipment     (1,652,984) (961,995)
Short term investments     0 0
Fixed maturity investments     0 0
Equity securities     0 0
Preferred stock     0  
Real estate     (33) 0
Mortgage loans     0 0
Proceeds from sale of:        
Property, plant and equipment     483,783 434,860
Short term investments     0 0
Fixed maturity investments     0 0
Equity securities     0 0
Preferred stock     0 0
Mortgage loans     0 0
Net cash used by investing activities     (1,163,539) (529,113)
Cash flow from financing activities:        
Borrowings from credit facilities     1,202,412 780,932
Principal repayments on credit facilities     (322,232) (558,280)
Payment of debt issuance costs     (8,006) (5,020)
Capital lease payments     (129,150) (173,520)
Securitization deposits       (49,019)
Common stock dividends paid     (29,412)  
Net contribution from (to) related party       41,199
Investment contract deposits     0 0
Investment contract withdrawals     0 0
Net cash provided by (used in) financing activities     713,612 36,292
Effects of exchange rate on cash     (5,046) 6,877
Increase (decrease) in cash and cash equivalents     1,243,940 791,189
Cash and cash equivalents at the beginning of period     1,010,275 459,078
Cash and cash equivalents at the end of the period 2,254,215 1,250,267 2,254,215 1,250,267
Operating Segments [Member] | Property and Casualty Insurance [Member]        
Cash flow from operating activities:        
Net earnings 7,630 9,086 26,945 19,217
Earnings from consolidated entities     0 0
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     0 0
Amortization of deferred policy acquisition costs 0 0 0 0
Amortization of premiums and accretion of discounts related to investments, net     1,326 1,180
Amortization of debt issuance costs     0 0
Interest credited to policyholders     0 0
Change in allowance for losses on trade receivables     (174) 0
Change in allowance for inventory reserves     0 0
Net gain on sale of real and personal property     0 0
Net losses on disposal of real estate 0 0 0 0
Net (gain) loss on sale of investments     (223) (86)
Net losses on equity investments     (3,695) 669
Deferred income tax     763 1,685
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     1,567 5,880
Inventories     0 0
Prepaid expenses     0 0
Capitalization of deferred policy acquisition costs     0 0
Other assets     72 286
Related party assets     (813) (151)
Accounts payable and accrued expenses     1,659 (2,106)
Policy benefits and losses, claims and loss expenses payable     (1,987) (8,824)
Other policyholders' funds and liabilities     61 (5,671)
Deferred income     0 0
Related party liabilities     (2,414) (946)
Net cash provided by operating activities     23,087 11,133
Cash flow from investing activities:        
Escrow deposits     0 0
Purchase of:        
Property, plant and equipment     0 0
Short term investments     (31,074) (38,789)
Fixed maturity investments     (7,749) (10,438)
Equity securities     0 0
Preferred stock     0  
Real estate     0 0
Mortgage loans     (19,132) (14,780)
Proceeds from sale of:        
Property, plant and equipment     0 0
Short term investments     20,608 38,830
Fixed maturity investments     13,816 14,217
Equity securities     0 0
Preferred stock     2,000 1,200
Mortgage loans     851 879
Net cash used by investing activities     (20,680) (8,881)
Cash flow from financing activities:        
Borrowings from credit facilities     0 0
Principal repayments on credit facilities     0 0
Payment of debt issuance costs     0 0
Capital lease payments     0 0
Securitization deposits       0
Common stock dividends paid     0  
Net contribution from (to) related party       0
Investment contract deposits     0 0
Investment contract withdrawals     0 0
Net cash provided by (used in) financing activities     0 0
Effects of exchange rate on cash     0 0
Increase (decrease) in cash and cash equivalents     2,407 2,252
Cash and cash equivalents at the beginning of period     5,658 4,794
Cash and cash equivalents at the end of the period 8,065 7,046 8,065 7,046
Operating Segments [Member] | Life Insurance [Member]        
Cash flow from operating activities:        
Net earnings 2,773 7,031 10,866 13,633
Earnings from consolidated entities     0 0
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     0 0
Amortization of deferred policy acquisition costs 7,947 6,572 23,520 19,012
Amortization of premiums and accretion of discounts related to investments, net     13,160 9,017
Amortization of debt issuance costs     0 0
Interest credited to policyholders     47,181 38,672
Change in allowance for losses on trade receivables     4 (1)
Change in allowance for inventory reserves     0 0
Net gain on sale of real and personal property     0 0
Net losses on disposal of real estate 0 0 0 0
Net (gain) loss on sale of investments     (3,272) (5,558)
Net losses on equity investments     0 0
Deferred income tax     (4,544) (759)
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     1,465 (6,052)
Inventories     0 0
Prepaid expenses     0 0
Capitalization of deferred policy acquisition costs     (25,703) (24,903)
Other assets     (107) (503)
Related party assets     0 0
Accounts payable and accrued expenses     965 2,988
Policy benefits and losses, claims and loss expenses payable     7,226 12,394
Other policyholders' funds and liabilities     (2,871) 30,348
Deferred income     (1,213) 1,368
Related party liabilities     474 (1,369)
Net cash provided by operating activities     67,151 88,287
Cash flow from investing activities:        
Escrow deposits     0 0
Purchase of:        
Property, plant and equipment     0 0
Short term investments     0 (1)
Fixed maturity investments     (440,534) (341,869)
Equity securities     (1,380) (838)
Preferred stock     (8,000)  
Real estate     (157) (274)
Mortgage loans     (112,501) (77,501)
Proceeds from sale of:        
Property, plant and equipment     0 0
Short term investments     61 0
Fixed maturity investments     270,531 317,190
Equity securities     2,026 72
Preferred stock     0 0
Mortgage loans     27,213 3,865
Net cash used by investing activities     (262,741) (115,500)
Cash flow from financing activities:        
Borrowings from credit facilities     0 9,600
Principal repayments on credit facilities     (11,187) (9,788)
Payment of debt issuance costs     0 0
Capital lease payments     0 0
Securitization deposits       0
Common stock dividends paid     0  
Net contribution from (to) related party       (18,599)
Investment contract deposits     271,657 326,055
Investment contract withdrawals     (177,777) (169,008)
Net cash provided by (used in) financing activities     82,693 138,260
Effects of exchange rate on cash     0 0
Increase (decrease) in cash and cash equivalents     (112,897) 111,047
Cash and cash equivalents at the beginning of period     178,079 30,480
Cash and cash equivalents at the end of the period 65,182 141,527 65,182 141,527
Consolidation, Eliminations [Member]        
Cash flow from operating activities:        
Net earnings (10,403) (16,117) (37,811) (32,850)
Earnings from consolidated entities     37,811 32,850
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     0 0
Amortization of deferred policy acquisition costs 0 0 0 0
Amortization of premiums and accretion of discounts related to investments, net     0 0
Amortization of debt issuance costs     0 0
Interest credited to policyholders     0 0
Change in allowance for losses on trade receivables     0 0
Change in allowance for inventory reserves     0 0
Net gain on sale of real and personal property     0 0
Net losses on disposal of real estate 0 0 0 0
Net (gain) loss on sale of investments     0 0
Net losses on equity investments     0 0
Deferred income tax     0 0
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     0 0
Inventories     0 0
Prepaid expenses     0 0
Capitalization of deferred policy acquisition costs     0 0
Other assets     0 0
Related party assets     0 0
Accounts payable and accrued expenses     0 0
Policy benefits and losses, claims and loss expenses payable     0 0
Other policyholders' funds and liabilities     0 0
Deferred income     0 0
Related party liabilities     0 0
Net cash provided by operating activities     0 0
Cash flow from investing activities:        
Escrow deposits     0 0
Purchase of:        
Property, plant and equipment     0 0
Short term investments     0 0
Fixed maturity investments     0 0
Equity securities     0 0
Preferred stock     0  
Real estate     0 0
Mortgage loans     0 0
Proceeds from sale of:        
Property, plant and equipment     0 0
Short term investments     0 0
Fixed maturity investments     0 0
Equity securities     0 0
Preferred stock     0 0
Mortgage loans     0 0
Net cash used by investing activities     0 0
Cash flow from financing activities:        
Borrowings from credit facilities     0 0
Principal repayments on credit facilities     0 0
Payment of debt issuance costs     0 0
Capital lease payments     0 0
Securitization deposits       0
Common stock dividends paid     0  
Net contribution from (to) related party       0
Investment contract deposits     0 0
Investment contract withdrawals     0 0
Net cash provided by (used in) financing activities     0 0
Effects of exchange rate on cash     0 0
Increase (decrease) in cash and cash equivalents     0 0
Cash and cash equivalents at the beginning of period     0 0
Cash and cash equivalents at the end of the period $ 0 $ 0 $ 0 $ 0
v3.22.0.1
Industry Segment and Geographic Area Data (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2021
Quarter ended:          
Total revenues $ 1,404,336 $ 1,169,982 $ 4,541,446 $ 3,482,127  
Depreciation and amortization, net of (gains) losses on disposals 112,660 160,298 381,791 479,016  
Interest expense 44,042 42,128 122,765 122,174  
Pretax earnings (loss) 371,446 241,571 1,365,072 706,908  
Income tax expense 89,980 58,586 328,533 169,832  
Identifiable assets 16,588,078 14,447,305 16,588,078 14,447,305 $ 14,651,606
United States [Member]          
Quarter ended:          
Total revenues 1,334,131 1,114,816 4,307,322 3,318,854  
Depreciation and amortization, net of (gains) losses on disposals 110,383 158,844 379,989 471,592  
Interest expense 43,140 41,378 119,856 120,015  
Pretax earnings (loss) 360,449 233,163 1,320,056 685,312  
Income tax expense 87,135 56,237 317,057 163,644  
Identifiable assets 16,077,571 14,020,573 16,077,571 14,020,573  
Canada [Member]          
Quarter ended:          
Total revenues 70,205 55,166 234,124 163,273  
Depreciation and amortization, net of (gains) losses on disposals 2,277 1,454 1,802 7,424  
Interest expense 902 750 2,909 2,159  
Pretax earnings (loss) 10,997 8,408 45,016 21,596  
Income tax expense 2,845 2,349 11,476 6,188  
Identifiable assets $ 510,507 $ 426,732 $ 510,507 $ 426,732  
v3.22.0.1
Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Postemployment Benefits [Abstract]        
Service cost for benefits earned during the period $ 350 $ 317 $ 1,051 $ 950
Other components of net periodic benefit costs:        
Interest cost on accumulated postretirement benefit 227 230 681 689
Other components 53 17 159 51
Total other components of net periodic benefit costs 280 247 840 740
Net periodic postretirement benefit cost $ 630 $ 564 $ 1,891 $ 1,690
v3.22.0.1
Fair Value Measurements (Narratives) (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements [Abstract]    
Fair value measurements, assets, significant unobservable inputs $ 0.1 $ 0.2
v3.22.0.1
Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Assets    
Reinsurance recoverables and trade receivables, net $ 230,437 $ 224,426
Mortgage loans, net 494,790 391,230
Other investments 107,581 98,529
Total 832,808 714,185
Liabilities    
Notes, loans and leases payable, gross 5,196,104 4,449,691
Total 5,196,104 4,449,691
Level 1 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 0 0
Mortgage loans, net 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, net 0 0
Other investments 0 0
Total 0 0
Liabilities    
Notes, loans and leases payable, gross 5,397,856 4,698,615
Total 5,397,856 4,698,615
Level 3 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 230,437 224,426
Mortgage loans, net 494,790 391,230
Other investments 107,581 98,529
Total 832,808 714,185
Liabilities    
Notes, loans and leases payable, gross 0 0
Total 0 0
Carrying Value [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 230,437 224,426
Mortgage loans, net 494,790 391,230
Other investments 107,581 98,529
Total 832,808 714,185
Liabilities    
Notes, loans and leases payable, gross 5,397,856 4,698,615
Total $ 5,397,856 $ 4,698,615
v3.22.0.1
Fair Value Measurements (Financial instruments level within the fair value hierarchy) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Assets:    
Short-term investments $ 2,102,275 $ 839,250
Fixed maturities - available for sale 2,743,151 2,653,539
Preferred stock 28,112 21,677
Common stock 24,179 20,440
Derivatives 6,557 6,601
Total 4,904,274 3,541,507
Liabilities:    
Derivatives 2,051 5,141
Total 2,051 5,141
Level 1 [Member]    
Assets:    
Short-term investments 2,102,275 839,250
Fixed maturities - available for sale 17,103 6,967
Preferred stock 28,112 21,677
Common stock 24,179 20,440
Derivatives 6,557 6,601
Total 2,178,226 894,935
Liabilities:    
Derivatives 0 0
Total 0 0
Level 2 [Member]    
Assets:    
Short-term investments 0 0
Fixed maturities - available for sale 2,725,938 2,646,415
Preferred stock 0 0
Common stock 0 0
Derivatives 0 0
Total 2,725,938 2,646,415
Liabilities:    
Derivatives 2,051 5,141
Total 2,051 5,141
Level 3 [Member]    
Assets:    
Short-term investments 0 0
Fixed maturities - available for sale 110 157
Preferred stock 0 0
Common stock 0 0
Derivatives 0 0
Total 110 157
Liabilities:    
Derivatives 0 0
Total $ 0 $ 0
v3.22.0.1
Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Revenue From Contract With Customer [Abstract]        
Revenues Recognized Over Time $ 73,785 $ 51,161 $ 261,638 $ 165,445
Revenues recognized at a point in time 90,763 84,820 322,405 304,522
Total revenues recognized under ASC 606 164,548 135,981 584,043 469,967
Revenues recognized under ASC 840 1,154,751 945,024 3,701,695 2,780,668
Revenues recognized under ASC 944 53,853 53,397 152,745 145,597
Revenues recognized under ASC 320 31,184 35,580 102,963 85,895
Total revenues $ 1,404,336 $ 1,169,982 $ 4,541,446 $ 3,482,127
v3.22.0.1
Revenue Recognition (Revenue over time) (Details)
$ in Thousands
Mar. 31, 2021
USD ($)
Contract With Customer Liability [Abstract]  
2020 $ 21,386
2021 12,024
2022 8,610
2023 6,450
2024 5,286
Thereafter 48,888
Self Moving Equipment [Member]  
Contract With Customer Liability [Abstract]  
2020 5,175
2021 0
2022 0
2023 0
2024 0
Thereafter 0
Property Lease Revenue [Member]  
Contract With Customer Liability [Abstract]  
2020 16,211
2021 12,024
2022 8,610
2023 6,450
2024 5,286
Thereafter $ 48,888
v3.22.0.1
Allowance for Credit Losses (Narratives) (Details)
$ in Millions
 9 Months Ended
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Receivables [Abstract]    
Trade receivable components 2  
Allowance for expected credit losses $ 4.3  
Available for sale securities, accrued interest receivable   $ 29.7
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]    
Reinsurance paid percentage of total assets 1.00%  
Premiums Receivable Gross $ 2.0  
Credit card receivables    
Receivables [Abstract]    
Average Historical Chargeback Term For credit card receivable, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivable. The Company rents equipment to corporate customers in which payment terms are 30 days.  
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.  
v3.22.0.1
Allowance for Credit Losses (Reserve Allowance Various Credit Loss) (Details)
$ in Thousands
 9 Months Ended
Dec. 31, 2021
USD ($)
Valuation And Qualifying Accounts [Abstract]  
March 31, 2020 $ 4,656
Transition adjustment expected credit loss current 204
Write-offs against allowance 0
Recoveries 0
December 31, 2020 4,860
Trade Receivables  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2020 2,835
Transition adjustment expected credit loss current 1,510
Write-offs against allowance 0
Recoveries 0
December 31, 2020 4,345
Investments, Fixed Maturities  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2020 1,320
Transition adjustment expected credit loss current (1,320)
Write-offs against allowance 0
Recoveries 0
December 31, 2020 0
Investments, Other  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2020 501
Transition adjustment expected credit loss current 14
Write-offs against allowance 0
Recoveries 0
December 31, 2020 $ 515