AMERCO /NV/, 10-Q filed on 03 Nov 21
 | XBRL Documents
v3.21.2
Document and Entity Information - shares
 3 Months Ended
Sep. 30, 2021
Nov. 03, 2021
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 Q2  
Document Period End Date Sep. 30, 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  
v3.21.2
Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
ASSETS:    
Cash and cash equivalents $ 2,430,233 $ 1,194,012
Reinsurance recoverables and trade receivables, net 227,935 224,426
Inventories, net 142,955 105,577
Prepaid expenses 202,339 469,144
Investments, fixed maturities and marketable equities 2,845,147 2,695,656
Investments, other 571,942 489,759
Deferred policy acquisition costs, net 97,138 89,749
Other assets 51,626 47,730
Right of use Assets - Financing 752,990 877,038
Right of use Assets - Operating 85,237 92,505
Related party assets 38,773 35,395
Subtotal assets 7,446,315 6,320,991
Property, plant and equipment, at cost:    
Land 1,172,648 1,075,813
Buildings and improvements 5,477,544 5,163,705
Furniture and equipment 811,337 786,505
Property, plant and equipment (gross) 12,277,075 11,413,668
Less: Accumulated depreciation (3,386,162) (3,083,053)
Total property, plant and equipment 8,890,913 8,330,615
Total assets 16,337,228 14,651,606
Liabilities:    
Accounts payable and accrued expenses 694,284 645,575
Notes, loans and leases payable 5,335,278 4,668,907
Operating lease liability 85,199 92,510
Policy benefits and losses, claims and loss expenses payable 1,016,505 997,701
Liabilities from investment contracts 2,276,829 2,161,530
Other policyholders' funds and liabilities 10,943 12,420
Deferred income 51,212 42,592
Deferred income taxes, net 1,312,281 1,178,489
Total liabilities 10,782,531 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 74,207 106,857
Retained earnings 5,693,824 4,958,359
Total stockholders' equity 5,554,697 4,851,882
Total liabilities and stockholders' equity 16,337,228 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 536,814 477,921
Rental Trucks [Member]    
Property, plant and equipment, at cost:    
Property subject to or available for operating lease, gross $ 4,278,732 $ 3,909,724
v3.21.2
Condensed Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenues:        
Self-moving equipment rentals $ 1,179,061 $ 931,030 $ 2,214,438 $ 1,585,315
Self-storage revenues 153,485 115,273 290,878 224,228
Self moving and self-storage products and service sales 92,191 98,628 197,076 189,978
Property management fees 8,747 7,840 17,196 15,187
Life insurance premiums 28,913 31,057 57,618 61,965
Property and casualty insurance premiums 22,499 15,869 39,368 29,603
Net investment and Interest income 36,780 33,333 71,779 50,315
Other revenue 142,578 91,878 248,757 155,554
Total revenues 1,664,254 1,324,908 3,137,110 2,312,145
Costs and expenses:        
Operating expenses 696,074 574,083 1,310,603 1,066,745
Commission expenses 127,896 99,365 241,045 168,540
Cost of sales 66,491 60,933 136,406 113,764
Benefits and losses 44,630 45,452 91,928 85,029
Amortization of deferred policy acquisition costs 6,750 5,552 15,573 12,440
Lease expense 7,441 6,870 15,088 13,473
Depreciation, net of (gains) losses on disposals 135,748 137,438 257,465 303,109
Net (gains) losses on disposal of real estate 523 3,425 (3,907) 3,169
Total costs and expenses 1,085,553 933,118 2,064,201 1,766,269
Earnings from operations 578,701 391,790 1,072,909 545,876
Other components of net periodic benefit costs (280) (246) (560) (493)
Interest expense (39,545) (40,525) (78,723) (80,046)
Pretax earnings 538,876 351,019 993,626 465,337
Income tax expense (128,978) (84,654) (238,553) (111,246)
Earnings available to common stockholders $ 409,898 $ 266,365 $ 755,073 $ 354,091
Basic and diluted earnings per common share $ 20.90 $ 13.58 $ 38.51 $ 18.06
Weighted average common shares outstanding: basic and diluted 19,607,788 19,607,788 19,607,788 19,607,788
v3.21.2
Condensed Consolidated Statements of Operations Parenthetical - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Depreciation:        
Net gain on sale of real and personal property     $ (86,398) $ (29,131)
Related party:        
Related party revenues, net of eliminations $ 8,747 $ 7,840 17,196 15,187
Related party, costs and expenses, net of eliminations $ 27,147 $ 21,191 $ 50,653 $ 37,180
v3.21.2
Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Comprehensive income (loss) (pretax):        
Pretax earnings (loss) $ 538,876 $ 351,019 $ 993,626 $ 465,337
Comprehensive income (loss) (tax effect):        
Income tax expense (128,978) (84,654) (238,553) (111,246)
Comprehensive income (loss) (net of tax):        
Net earnings 409,898 266,365 755,073 354,091
Other comprehensive income (loss):        
Foreign currency translation (pretax) 992 290 (2,400) (2,627)
Foreign currency translation (tax effect) 0 0 0 0
Foreign currency translation (net of tax) 992 290 (2,400) (2,627)
Unrealized gain (loss) on investments (pretax) 52,525 115,186 (39,926) 56,224
Unrealized gain (loss) on investments (tax effect) (11,143) (24,347) 8,281 (10,884)
Unrealized gain (loss) on investments (net of tax) 41,382 90,839 (31,645) 45,340
Change in fair value of cash flow hedges (pretax) (74) 46 (142) (659)
Change in fair value of cash flow hedges (tax effect) 18 (11) 35 162
Change in fair value of cash flow hedges (net of tax) (56) 35 (107) (497)
Amounts reclassified into earnings on hedging activities (pre tax) 1,003 961 1,990 1,708
Amounts reclassified into earnings on hedging activities (tax effect) (246) (237) (488) (420)
Amounts reclassified into earnings on hedging activities (net of tax) 757 724 1,502 1,288
Total other comprehensive income (loss) (pretax) 54,446 116,483 (40,478) 54,646
Total other comprehensive income (loss) (tax effect) (11,371) (24,595) 7,828 (11,142)
Total other comprehensive income (loss) (net of tax) 43,075 91,888 (32,650) 43,504
Total comprehensive income (loss) (pretax) 593,322 467,502 953,148 519,983
Total comprehensive income (loss) (tax effect) (140,349) (109,249) (230,725) (122,388)
Total comprehensive income (loss) (net of tax) $ 452,973 $ 358,253 $ 722,423 $ 397,595
v3.21.2
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                
Adjustment for adoption of ASU 2016-13 (2,880) 0 0 0 (2,880) 0 0  
Foreign currency translation (2,627) 0 0 (2,627) 0 0 0  
Unrealized net gain (loss) on investments, net of tax 45,340 0 0 45,340 0 0 0  
Change in fair value of cash flow hedges, net of tax (497) 0 0 (497) 0 0 0  
Amounts reclassified into earnings on hedging activities, net 1,288 0 0 1,288 0 0 0  
Net earnings 354,091 0 0 0 354,091 0 0  
Common stock dividends (9,804) 0 0 0 (9,804) 0 0  
Net activity 384,911 0 0 43,504 341,407 0 0  
Balance, end of period at Sep. 30, 2020 4,605,631 10,497 453,819 78,156 4,740,809 (525,653) (151,997)  
Balance, beginning of period at Jun. 30, 2020 4,257,182 10,497 453,819 (13,732) 4,484,248 (525,653) (151,997)  
Cosolidated statement of change in equity                
Foreign currency translation 290 0 0 290 0 0 0  
Unrealized net gain (loss) on investments, net of tax 90,839 0 0 90,839 0 0 0  
Change in fair value of cash flow hedges, net of tax 35 0 0 35 0 0 0  
Amounts reclassified into earnings on hedging activities, net 724 0 0 724 0 0 0  
Net earnings 266,365 0 0 0 266,365 0 0  
Common stock dividends (9,804) 0 0 0 (9,804) 0 0  
Net activity 348,449 0 0 91,888 256,561 0 0  
Balance, end of period at Sep. 30, 2020 4,605,631 10,497 453,819 78,156 4,740,809 (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 (2,400) 0 0 (2,400) 0 0 0 $ 0
Unrealized net gain (loss) on investments, net of tax (31,645) 0 0 (31,645) 0 0 0 0
Change in fair value of cash flow hedges, net of tax (107) 0 0 (107) 0 0 0 0
Amounts reclassified into earnings on hedging activities, net 1,502 0 0 1,502 0 0 0 $ 0
Net earnings 755,073 0 0 0 755,073 0 0  
Common stock dividends (19,608) 0 0 0 (19,608) 0 0  
Net activity 702,815 0 0 (32,650) 735,465 0 0  
Balance, end of period at Sep. 30, 2021 5,554,697 10,497 453,819 74,207 5,693,824 (525,653) (151,997)  
Balance, beginning of period at Jun. 30, 2021 5,111,528 10,497 453,819 31,132 5,293,730 (525,653) (151,997)  
Cosolidated statement of change in equity                
Foreign currency translation 992 0 0 992 0 0 0  
Unrealized net gain (loss) on investments, net of tax 41,382 0 0 41,382 0 0 0  
Change in fair value of cash flow hedges, net of tax (56) 0 0 (56) 0 0 0  
Amounts reclassified into earnings on hedging activities, net 757 0 0 757 0 0 0  
Net earnings 409,898 0 0 0 409,898 0 0  
Common stock dividends (9,804) 0 0 0 (9,804) 0 0  
Net activity 443,169 0 0 43,075 400,094 0 0  
Balance, end of period at Sep. 30, 2021 $ 5,554,697 $ 10,497 $ 453,819 $ 74,207 $ 5,693,824 $ (525,653) $ (151,997)  
v3.21.2
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash flow from operating activities:    
Net earnings $ 755,073 $ 354,091
Adjustments to reconcile net earnings to cash provided by operations:    
Depreciation 343,863 332,240
Amortization of deferred policy acquisition costs 15,573 12,440
Amortization of premiums and accretion of discounts related to investments, net 9,151 6,926
Amortization of debt issuance costs 2,791 2,755
Interest credited to policyholders 31,894 24,241
Change in allowance for losses on trade receivables 222 (140)
Change in allowance for inventory reserves 8,352 106
Net gain on sale of real and personal property (86,398) (29,131)
Net losses on disposal of real estate (3,907) 3,169
Net (gain) loss on sale of investments (3,432) (1,288)
Net losses on equity investments (4,342) 2,254
Deferred income tax 138,916 80,198
Net change in other operating assets and liabilities:    
Reinsurance recoverables and trade receivables (3,771) (28,288)
Inventories (45,718) 386
Prepaid expenses 266,780 116,064
Capitalization of deferred policy acquisition costs (17,807) (13,404)
Other assets (1,327) (553)
Related party assets (2,724) 2,785
Accounts payable and accrued expenses 91,548 112,489
Policy benefits and losses, claims and loss expenses payable 18,968 16,575
Other policyholders' funds and liabilities (1,477) (4,764)
Deferred income 7,592 13,237
Related party liabilities (700) (46)
Net cash provided by operating activities 1,519,120 1,002,342
Cash flow from investing activities:    
Escrow deposits (2,341) 1,266
Purchase of:    
Property, plant and equipment (1,039,688) (662,259)
Short term investments (21,669) (19,222)
Fixed maturity investments (415,640) (160,755)
Equity securities (36) (719)
Preferred stock (8,000) (13,111)
Real estate (124) (223)
Mortgage loans (106,963) (72,316)
Proceeds from sale of:    
Property, plant and equipment 306,946 314,335
Short term investments 16,673 23,180
Fixed maturity investments 230,043 226,656
Preferred stock 1,894 72
Mortgage loans 26,612 3,219
Net cash used by investing activities (1,012,293) (359,877)
Cash flow from financing activities:    
Borrowings from credit facilities 987,048 585,723
Principal repayments on credit facilities (227,072) (386,779)
Payment of debt issuance costs (2,092) (3,477)
Capital lease payments (87,500) (122,720)
Common stock dividends paid (19,608) (9,804)
Net contribution from (to) related party   0
Investment contract deposits 199,426 114,288
Investment contract withdrawals (116,021) (102,466)
Net cash provided by (used in) financing activities 734,181 74,765
Effects on exchange rate on cash (4,787) 3,986
Increase (decrease) in cash and cash equivalents 1,236,221 721,216
Cash and cash equivalents at the beginning of period 1,194,012 494,352
Cash and cash equivalents at the end of the period $ 2,430,233 $ 1,215,568
v3.21.2
Basis of Presentation
 6 Months Ended
Sep. 30, 2021
Disclosure Text Block [Abstract]  
1. Basis of Presentation 1.Basis of Presentation AMERCO, a Nevada corporation (“AMERCO”), has a second fiscal quarter that ends on the 30 th of September for each year that is referenced. Our insurance company subsidiaries have a second quarter that ends on the 30 th of June 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. Certain amounts reported in previous years have been reclassified to conform to the current presentation. The condensed consolidated balance sheet as of September 30, 2021 and the related condensed consolidated statements of operations, comprehensive income (loss), stockholders’ equity for the second quarter and first six months of fiscal 2022 and 2021 and cash flows for the first six 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 Management’s Discussion and Analysis of Financial Condition and Results of Operations and 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.
v3.21.2
Earnings Per Share
 6 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
2. Earnings Per Share 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.
v3.21.2
Investments
 6 Months Ended
Sep. 30, 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 $ 25.4 million and $ 27.7 million as of September 30, 2021 and March 31, 2021, respectively. Available-for-Sale Investments Available-for-sale investments as of September 30, 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 $ 103,378 $   9,917 $   – $   (508) $   – $ 112,787 U.S. government agency mortgage-backed securities   58,978   478   –   (1,890)   –   57,566 Obligations of states and political subdivisions   203,429   19,461   (76)   (283)   –   222,531 Corporate securities   2,048,283   169,072   (90)   (3,615)   (179)   2,213,471 Mortgage-backed securities   172,606   11,284   (1)   (1)   –   183,888   $ 2,586,674 $   210,212 $   ( 167 ) $   ( 6,297 ) $   ( 179 ) $ 2,790,243   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 $ 224.0 million during the first six months of fiscal 2022. The gross realized gains on these sales totaled $ 3.7 million. The gross realized losses on these sales totaled $ 2.2 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 six months as of September 30, 2021.   The adjusted cost and estimated market value of available-for-sale investments by contractual maturity were as follows:       September 30, 2021   March 31, 2021     Cost Amortized   Market Value Estimated   Cost Amortized   Market Value Estimated     (Unaudited)         (In thousands) Due in one year or less $ 48,717 $ 49,480 $ 90,142 $ 91,190 Due after one year through five years   575,511   613,941   562,442   601,818 Due after five years through ten years   693,842   768,285   672,733   754,536 Due after ten years   1,095,998   1,174,649   905,567   1,019,570     2,414,068   2,606,355   2,230,884   2,467,114                   Mortgage-backed securities   172,606   183,888   174,728   186,425   $ 2,586,674 $ 2,790,243 $ 2,405,612 $ 2,653,539   As of September 30, 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:       September 30, 2021   March 31, 2021     Amortized   Estimated   Amortized   Estimated     (Unaudited)             (In thousands)                   Common stocks $ 9,775 $ 24,728 $ 9,775 $ 20,440 Non-redeemable preferred stocks   28,034   30,176   20,034   21,677   $ 37,809 $ 54,904 $ 29,809 $ 42,117
v3.21.2
Derivatives
 6 Months Ended
Sep. 30, 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     September 30, 2021   March 31, 2021     (Unaudited)         (In thousands) Interest rate contracts designated as hedging instruments:         Assets $ – $ – Liabilities $ 3,292 $ 5,141 Notional amount $ 235,000 $ 235,000       The Effect of Interest Rate Contracts on the Statements of Operations for the Quarters Ended         September 30, 2021   September 30, 2020     (Unaudited)     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (929) $ (1,007) (Gain) loss reclassified from AOCI into income $ ( 1,003 ) $ ( 961 )   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 six months of fiscal 2022, we recognized an increase in the fair value of our cash flow hedges of $0.1 million, net of taxes. During the first six months of fiscal 2022 we reclassified $1.5 million from accumulated other comprehensive income (loss) (“AOCI”) to interest expense. As of September 30, 2021, we expect to reclassify $3.2 million of net losses on interest rate contracts from AOCI to earnings as interest expense over the next twelve months.
v3.21.2
Accumulated Other Comprehensive Income (Loss)
 6 Months Ended
Sep. 30, 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   (2,400)   –   –   –   (2,400) Unrealized net gain on investments   –   (31,645)   –   –   (31,645) Change in fair value of cash flow hedges   –   –   (107)   –   (107) Amounts reclassified into earnings on hedging activities   –   –   1,502   –   1,502 Other comprehensive income (loss)   (2,400)   (31,645)   1,395   –   (32,650) Balance as of September 30, 2021 $ ( 55,329 ) $   136,008 $   ( 2,484 ) $   ( 3,988 ) $   74,207
v3.21.2
Stockholders' Equity
 6 Months Ended
Sep. 30, 2021
Stockholders' Equity [Abstract]  
7. Stockholders' Equity 7. Stockholders’ Equity The following table lists the dividends that have been declared and issued for fiscal year 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 September 30, 2021, no awards had been issued under the 2016 AMERCO Stock Option Plan.
v3.21.2
Leases
 6 Months Ended
Sep. 30, 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. The standard also changed the manner by which we account for our equipment sale/leaseback transactions.   Based on our assessment, the lease transactions are classified as financing leases, and therefore the transactions do not qualify as a sale.   Pursuant to the guidance, new sale leaseback transactions that fail to qualify as a sale will be 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 September 30, 2021     Finance   Operating   Total     (Unaudited)     (In thousands)               Buildings and improvements $ – $ 136,568 $ 136,568 Furniture and equipment   18,316   –   18,316 Rental trailers and other rental equipment   182,741   –   182,741 Rental trucks   1,325,624   –   1,325,624 Right-of-use assets, gross   1,526,681   136,568   1,663,249 Less: Accumulated depreciation   (773,691)   (51,331)   (825,022) Right-of-use assets, net $ 752,990 $ 85,237 $ 838,227       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 September 30, 2021 and March 31, 2021, we had finance leases for the ROU assets, net of $426.2 million and $513.6 million, respectively and operating leases of $85.2 million and $92.5 million, respectively.         Finance leases       September 30,   March 31,       2021   2021   Weighted average remaining lease term (years)   3   3   Weighted average discount rate   3.6 % 3.6 %       Operating leases       September 30,   March 31,       2021   2021   Weighted average remaining lease term (years)   15.2   14.7   Weighted average discount rate   4.6 % 4.6 % For the six months ended September 30, 2021 and 2020, cash paid for leases included in our operating cash flow activities were $ 15.2 million and $ 14.2 million, respectively, and our financing cash flow activities were $ 87.5 million and $ 122.7 million, respectively. Non-cash activities of ROU assets in exchange for lease liabilities were $3.8 million and $5.2 million for the first six months of fiscal 2022 and 2021, respectively. The components of lease costs were as follows:       Six Months Ended     September 30, 2021   September 30, 2020     (Unaudited)     (In thousands)           Operating lease costs $ 16,101 $ 14,540           Finance lease cost:         Amortization of right-of-use assets $ 62,243 $ 79,259 Interest on lease liabilities   8,780   12,082 Total finance lease cost $ 71,023 $ 91,341 Maturities of lease liabilities were as follows:     Finance leases   Operating leases     (Unaudited) Year ending September 30,   (In thousands)           2022 $ 155,818 $ 24,757 2023   129,840   22,610 2024   87,728   17,921 2025   62,633   6,045 2026   20,956   3,135 Thereafter   –   60,834 Total lease payments   456,975   135,302 Less: imputed interest   (30,820)   (50,103) Present value of lease liabilities $ 426,155 $ 85,199
v3.21.2
Contingencies
 6 Months Ended
Sep. 30, 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 six months of fiscal 2022, 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.
v3.21.2
Related Party Transactions
 6 Months Ended
Sep. 30, 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 September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 7,428 $ 6,644 U-Haul management fee revenue from Mercury   1,319   1,196   $ 8,747 $ 7,840       Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 14,608 $ 12,792 U-Haul management fee revenue from Mercury   2,588   2,395   $ 17,196 $ 15,187   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 $ 19.4 million and $ 17.5 million from the above-mentioned entities during the first six 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 September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 611 $ 658 U-Haul commission expenses to Blackwater   26,536   20,533   $ 27,147 $ 21,191       Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 1,237 $ 1,315 U-Haul commission expenses to Blackwater   49,416   35,865   $ 50,653 $ 37,180   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 September 30, 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 $ 14.6 million, expenses of $ 1.2 million and cash flows of $ 13.3 million during the first six months of fiscal 2022. Revenues and commission expenses related to the Dealer Agreements were $ 234.6 million and $ 49.4 million, respectively, during the first six 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     September 30,   March 31,     2021   2021     (Unaudited)         (In thousands) U-Haul receivable from Blackwater $ 34,189 $ 27,116 U-Haul receivable from Mercury   4,610   9,632 Other (a)   (26)   (1,353)   $ 38,773 $ 35,395 (a)       Timing differences for intercompany balances with insurance subsidiaries resulting from the three-month difference in reporting periods.  
v3.21.2
Consolidating Financial Information by Industry Segment
 6 Months Ended
Sep. 30, 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.
v3.21.2
Industry Segment and Geographic Area Data
 6 Months Ended
Sep. 30, 2021
Segments, Geographical Areas [Abstract]  
12. Industry Segment and Geographic Area Data 12. Industry Segment and Geographic Area Data     United States   Canada   Consolidated     (Unaudited)     (All amounts are in thousands of U.S. $'s) Quarter Ended September 30, 2021             Total revenues $ 1,576,830 $ 87,424 $ 1,664,254 Depreciation and amortization, net of (gains) on disposal   141,956   1,065   143,021 Interest expense   38,588   957   39,545 Pretax earnings   521,658   17,218   538,876 Income tax expense   124,620   4,358   128,978 Identifiable assets   15,849,380   487,848   16,337,228               Quarter Ended September 30, 2020             Total revenues $ 1,261,235 $ 63,673 $ 1,324,908 Depreciation and amortization, net of (gains) on disposal   144,222   2,193   146,415 Interest expense   39,983   542   40,525 Pretax earnings   340,200   10,819   351,019 Income tax expense   81,624   3,030   84,654 Identifiable assets   13,693,016   430,462   14,123,478       United States   Canada   Consolidated     (Unaudited)     (All amounts are in thousands of U.S. $'s) Six Months Ended September 30, 2021             Total revenues $ 2,973,191 $ 163,919 $ 3,137,110 Depreciation and amortization, net of (gains) on disposal   269,606   (475)   269,131 Interest expense   76,716   2,007   78,723 Pretax earnings   959,607   34,019   993,626 Income tax expense   229,922   8,631   238,553 Identifiable assets   15,849,380   487,848   16,337,228               Six Months Ended September 30, 2020             Total revenues $ 2,204,038 $ 108,107 $ 2,312,145 Depreciation and amortization, net of (gains) on disposal   312,748   5,970   318,718 Interest expense   78,637   1,409   80,046 Pretax earnings   452,149   13,188   465,337 Income tax expense   107,407   3,839   111,246 Identifiable assets   13,693,016   430,462   14,123,478
v3.21.2
Employee Benefit Plans
 6 Months Ended
Sep. 30, 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 September 30,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 351 $   316 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   227   229 Other components   53   17 Total other components of net periodic benefit costs   280   246 Net periodic postretirement benefit cost $ 631 $   562       Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 701 $   633 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   454   459 Other components   106   34 Total other components of net periodic benefit costs   560   493 Net periodic postretirement benefit cost $ 1,261 $   1,126
v3.21.2
Fair Value Measurements
 6 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
14. Fair Value Measurements 14. Fair Value Measurements Certain assets and liabilities are recorded at fair value on the consolidated balance sheets and are measured and classified based upon a three-tiered approach to valuation. Financial assets and liabilities are recorded at fair value and are classified and disclosed in one of the following three categories: Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;   Level 2 – Quoted prices for identical or similar financial instruments in markets that are not considered to be active, or similar financial instruments for which all significant inputs are observable, either directly or indirectly, or inputs other than quoted prices that are observable, or inputs that are derived principally from or corroborated by observable market data through correlation or other means; and Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and are unobservable. These reflect management’s assumptions about the assumptions a market participant would use in pricing the asset or liability. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Fair values of cash equivalents approximate carrying value due to the short period of time to maturity. Fair values of short-term investments, investments available-for-sale, long-term investments, mortgage loans and notes on real estate, and interest rate swap contracts are based on quoted market prices, dealer quotes or discounted cash flows. Fair values of trade receivables approximate their recorded value.   Our financial instruments that are exposed to concentrations of credit risk consist primarily of temporary cash investments, trade receivables, reinsurance recoverables and notes receivable. Limited credit risk exists on trade receivables due to the diversity of our customer base and their dispersion across broad geographic markets. We place our temporary cash investments with financial institutions and limit the amount of credit exposure to any one financial institution. We have mortgage receivables, which potentially expose us to credit risk. The portfolio of notes is principally collateralized by self-storage facilities and commercial properties. We have not experienced any material losses related to the notes from individual or groups of notes in any particular industry or geographic area. The estimated fair values were determined using the discounted cash flow method and using interest rates currently offered for similar loans to borrowers with similar credit ratings. The carrying amount of long-term debt and short-term borrowings are estimated to approximate fair value as the actual interest rate is consistent with the rate estimated to be currently available for debt of similar term and remaining maturity. Other investments, including short-term investments, are substantially current or bear reasonable interest rates. As a result, the carrying values of these financial instruments approximate fair value. The carrying values and estimated fair values for the financial instruments stated above and their placement in the fair value hierarchy are as follows:       Fair Value Hierarchy     Carrying               Total Estimated As of September 30, 2021   Value   Level 1   Level 2   Level 3   Fair Value     (Unaudited) Assets   (In thousands) Reinsurance recoverables and trade receivables, net $ 227,935 $ – $ – $ 227,935 $ 227,935 Mortgage loans, net   471,566   –   –   471,566   471,566 Other investments   100,376   –   –   100,376   100,376 Total $ 799,877 $ – $ – $ 799,877 $ 799,877                                             Liabilities                     Notes, loans and finance leases payable   5,364,279   –   5,364,279   –   5,127,100 Total $ 5,364,279 $ – $ 5,364,279 $ – $ 5,127,100       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     The following tables represent the financial assets and liabilities on the condensed consolidated balance sheets as of September 30, 2021 and March 31, 2021 that are measured at fair value on a recurring basis and the level within the fair value hierarchy.   As of September 30, 2021   Total   Level 1   Level 2   Level 3     (Unaudited) Assets   (In thousands) Short-term investments $ 2,215,846 $ 2,215,846 $ – $ – Fixed maturities - available for sale   2,790,243   6,721   2,783,407   115 Preferred stock   30,176   30,176   –   – Common stock   24,728   24,728   –   – Derivatives   5,754   5,754   –   – Total $ 5,066,747 $ 2,283,225 $ 2,783,407 $ 115                                     Liabilities                 Derivatives   3,292   –   3,292   – Total $ 3,292 $ – $ 3,292 $ – 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 $ – The fair value measurements for our assets using significant unobservable inputs (Level 3) were $0.1 million and $0.2 million for September 30, 2021 and March 31, 2021, respectively.
v3.21.2
Revenue Recognition
 6 Months Ended
Sep. 30, 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 September 30, 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 under Topic 606, which is consistent with the timing of our revenue recognition under legacy guidance. 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 in accordance with paragraph 606-10-25-19. 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 under Topic 606, which is consistent with the timing of our revenue recognition under legacy guidance for the Management Fee component of the compensation received in exchange for the service. Additionally, in certain contracts the Company has the ability to earn an incentive fee based on operational results. Historically, these fees have been recognized once fully determinable. Under Topic 606, 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 second 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 under Topic 606 which is consistent with the timing of our revenue recognition under legacy guidance. 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 Ended March 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands)                           Self-moving equipment rentals $ 6,186 $ – $ – $ – $ – $ – Property lease revenues   16,213   12,287   8,560   6,161   4,581   48,866 Total $ 22,399 $ 12,287 $ 8,560 $ 6,161 $ 4,581 $ 48,866   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. Life insurance premiums are recognized in accordance with existing guidance in Topic 944 – Financial Services – Insurance.   Property and casualty insurance premiums are recognized as revenue over the policy periods. Interest and investment income are recognized as earned. Property and casualty premiums are recognized in accordance with existing guidance in Topic 944 – Financial Services – Insurance. 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. Net investment and interest income is recognized in accordance with existing guidance in Topic 825 – Financial Instruments. In the following tables, revenue is disaggregated by timing of revenue recognition:     Quarter Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   108,038 $   69,346 Revenues recognized at a point in time:   110,924   114,854 Total revenues recognized under ASC 606   218,962   184,200           Revenues recognized under ASC 842   1,355,934   1,060,950 Revenues recognized under ASC 944   52,578   46,425 Revenues recognized under ASC 320   36,780   33,333 Total revenues $   1,664,254 $   1,324,908       Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   187,853 $   114,284 Revenues recognized at a point in time:   231,642   219,702 Total revenues recognized under ASC 606   419,495   333,986           Revenues recognized under ASC 842   2,546,944   1,835,644 Revenues recognized under ASC 944   98,892   92,200 Revenues recognized under ASC 320   71,779   50,315 Total revenues $   3,137,110 $   2,312,145 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.
v3.21.2
Allowance For Credit Losses
 6 Months Ended
Sep. 30, 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 as of September 30, 2021 was $ 3.4 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 September 30, 2021. Accrued Interest Receivable Accrued interest receivables on available for sale securities totaled $29.5 million as of June 30, 2021 and are excluded from the estimate of credit losses.   As outlined in subtopic 326-20-30-5A, 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 (in accordance with subtopic 326-20-35-8A). 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 at January 1, 2021 which is immaterial based on historical loss experience and high credit rating of the reinsurers. Premium receivables Premiums receivables   were $ 2.7 million as of June 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   531   (1,141)   8   (602) Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of September 30, 2021 $ 3,366 $ 179 $ 509 $ 4,054
v3.21.2
Accounting Pronouncements
 6 Months Ended
Sep. 30, 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, Refinance 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.
v3.21.2
Investments (Table Text Block)
 6 Months Ended 12 Months Ended
Sep. 30, 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 $ 103,378 $   9,917 $   – $   (508) $   – $ 112,787 U.S. government agency mortgage-backed securities   58,978   478   –   (1,890)   –   57,566 Obligations of states and political subdivisions   203,429   19,461   (76)   (283)   –   222,531 Corporate securities   2,048,283   169,072   (90)   (3,615)   (179)   2,213,471 Mortgage-backed securities   172,606   11,284   (1)   (1)   –   183,888  $ 2,586,674 $  210,212 $ ( 167 )$ ( 6,297 )$ ( 179 )$ 2,790,243     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     September 30, 2021   March 31, 2021     Amortized   Estimated   Amortized   Estimated     (Unaudited)         (In thousands) Due in one year or less $ 48,717 $ 49,480 $ 90,142 $ 91,190 Due after one year through five years   575,511   613,941   562,442   601,818 Due after five years through ten years   693,842   768,285   672,733   754,536 Due after ten years   1,095,998   1,174,649   905,567   1,019,570     2,414,068   2,606,355   2,230,884   2,467,114                   Mortgage-backed securities   172,606   183,888   174,728   186,425  $ 2,586,674 $ 2,790,243 $ 2,405,612 $ 2,653,539  
Available for sale equity investments     September 30, 2021   March 31, 2021     Cost   Market   Cost   Market     (Unaudited)             (In thousands)                   Common stocks $ 9,775 $ 24,728 $ 9,775 $ 20,440 Non-redeemable preferred stocks   28,034   30,176   20,034   21,677  $ 37,809 $ 54,904 $ 29,809 $ 42,117  
v3.21.2
Derivatives (Table Text Block)
 6 Months Ended
Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of derivative instruments in statement of financial position, fair value     Derivatives Fair Values as of     September 30, 2021   March 31, 2021     (Unaudited)         (In thousands) Interest rate contracts designated as hedging instruments:         Assets $ – $ – Liabilities $ 3,292 $ 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         September 30, 2021   September 30, 2020     (Unaudited)     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (929) $ (1,007) (Gain) loss reclassified from AOCI into income$( 1,003 )$( 961 )
v3.21.2
Accumulated Other Comprehensive Income (loss) (Table Text Block)
 6 Months Ended
Sep. 30, 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   (2,400)   –   –   –   (2,400) Unrealized net gain on investments   –   (31,645)   –   –   (31,645) Change in fair value of cash flow hedges   –   –   (107)   –   (107) Amounts reclassified into earnings on hedging activities   –   –   1,502   –   1,502 Other comprehensive income (loss)   (2,400)   (31,645)   1,395   –   (32,650) Balance as of September 30, 2021$( 55,329 )$  136,008 $ ( 2,484 )$ ( 3,988 )$  74,207
v3.21.2
Stockholders' Equity (Table Text Block)
 6 Months Ended
Sep. 30, 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
v3.21.2
Leases (Table Text Block)
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Mar. 31, 2021
Leases [Abstract]      
Supplemental Balance Sheet Information Related to Leases       As of September 30, 2021     Finance   Operating   Total     (Unaudited)     (In thousands)               Buildings and improvements $ – $ 136,568 $ 136,568 Furniture and equipment   18,316   –   18,316 Rental trailers and other rental equipment   182,741   –   182,741 Rental trucks   1,325,624   –   1,325,624 Right-of-use assets, gross   1,526,681   136,568   1,663,249 Less: Accumulated depreciation   (773,691)   (51,331)   (825,022) Right-of-use assets, net$ 752,990 $ 85,237 $ 838,227     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       September 30,   March 31,       2021   2021   Weighted average remaining lease term (years)   3   3   Weighted average discount rate  3.6 % 3.6 %     Operating leases       September 30,   March 31,       2021   2021   Weighted average remaining lease term (years)   15.2   14.7   Weighted average discount rate  4.6 % 4.6 %  
Components of Lease Expense       Six Months Ended     September 30, 2021   September 30, 2020     (Unaudited)     (In thousands)           Operating lease costs $ 16,101 $ 14,540           Finance lease cost:         Amortization of right-of-use assets $ 62,243 $ 79,259 Interest on lease liabilities   8,780   12,082 Total finance lease cost$ 71,023 $ 91,341  
Maturities of Lease Liabilities       Finance leases   Operating leases     (Unaudited) Year ending September 30,   (In thousands)           2022 $ 155,818 $ 24,757 2023   129,840   22,610 2024   87,728   17,921 2025   62,633   6,045 2026   20,956   3,135 Thereafter   –   60,834 Total lease payments   456,975   135,302 Less: imputed interest   (30,820)   (50,103) Present value of lease liabilities$ 426,155 $ 85,199  
v3.21.2
Related Party Transations (Table Text Block)
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Related Party Revenue [Abstract]    
Related Party Revenue     Quarter Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 7,428 $ 6,644 U-Haul management fee revenue from Mercury   1,319   1,196  $ 8,747 $ 7,840     Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul management fee revenue from Blackwater $ 14,608 $ 12,792 U-Haul management fee revenue from Mercury   2,588   2,395  $ 17,196 $ 15,187
Related Party costs and expenses     Quarter Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 611 $ 658 U-Haul commission expenses to Blackwater   26,536   20,533  $ 27,147 $ 21,191     Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands) U-Haul lease expenses to Blackwater $ 1,237 $ 1,315 U-Haul commission expenses to Blackwater   49,416   35,865  $ 50,653 $ 37,180
Related party assets       September 30,   March 31,     2021   2021     (Unaudited)         (In thousands) U-Haul receivable from Blackwater $ 34,189 $ 27,116 U-Haul receivable from Mercury   4,610   9,632 Other (a)   (26)   (1,353)   $ 38,773 $ 35,395 (a)      
v3.21.2
Consolidating Financial Information By Industry Segment (Table Text Block)
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 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 $ 2,393,762 $ 7,293 $ 29,178 $ –   $ 2,430,233 Reinsurance recoverables and trade receivables, net   112,319   67,217   48,399   –     227,935 Inventories and parts, net   142,955   –   –   –     142,955 Prepaid expenses   202,339   –   –   –     202,339 Investments, fixed maturities and marketable equities   –   292,986   2,552,161   –     2,845,147 Investments, other   20,745   105,474   445,723   –     571,942 Deferred policy acquisition costs, net   –   –   97,138   –     97,138 Other assets   48,190   755   2,681   –     51,626 Right of use assets - financing, net   752,990   –   –   –     752,990 Right of use assets - operating, net   84,949   155   133   –     85,237 Related party assets   55,175   8,294   14,325   (39,021) (c)   38,773     3,813,424   482,174   3,189,738   (39,021)     7,446,315                         Investment in subsidiaries   738,116   –   –   (738,116) (b)   –                         Property, plant and equipment, at cost:                       Land   1,172,648   –   –   –     1,172,648 Buildings and improvements   5,477,544   –   –   –     5,477,544 Furniture and equipment   811,337   –   –   –     811,337 Rental trailers and other rental equipment   536,814   –   –   –     536,814 Rental trucks   4,278,732   –   –   –     4,278,732     12,277,075   –   –   –     12,277,075 Less:   Accumulated depreciation   (3,386,162)   –   –   –     (3,386,162) Total property, plant and equipment, net   8,890,913   –   –   –     8,890,913 Total assets $ 13,442,453 $ 482,174 $ 3,189,738 $ (777,137)   $ 16,337,228                         (a) Balances as of June 30, 2021                       (b) Eliminate investment in subsidiaries                       (c) Eliminate intercompany receivables and payables                           Consolidating balance sheets by industry segment as of September 30, 2021, continued:     Moving & Storage   Property & Casualty Insurance (a)   Life   Eliminations     AMERCO     (Unaudited)     (In thousands) Liabilities:                       Accounts payable and accrued expenses $ 685,563 $ 3,575 $ 5,146 $ –   $ 694,284 Notes, loans and finance leases payable, net   5,324,373   –   10,905   –     5,335,278 Operating lease liability   84,905   152   142   –     85,199 Policy benefits and losses, claims and loss expenses payable   442,160   179,116   395,229   –     1,016,505 Liabilities from investment contracts   –   –   2,276,829   –     2,276,829 Other policyholders' funds and liabilities   –   3,476   7,467   –     10,943 Deferred income   51,212   –   –   –     51,212 Deferred income taxes, net   1,277,383   13,152   21,746   –     1,312,281 Related party liabilities   25,956   3,600   13,261   (42,817) (c)   – Total liabilities   7,891,552   203,071   2,730,725   (42,817)     10,782,531                         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)   70,411   19,692   112,519   (128,415) (b)   74,207 Retained earnings   5,693,614   164,990   317,723   (482,503) (b)   5,693,824 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   5,550,901   279,103   459,013   (734,320)     5,554,697 Total liabilities and stockholders' equity $ 13,442,453 $ 482,174 $ 3,189,738 $ (777,137)   $ 16,337,228                         (a) Balances as of June 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 $ 1,180,329 $ – $ – $ (1,268) (c) $ 1,179,061 Self-storage revenues   153,485   –   –   –     153,485 Self-moving and self-storage products and service sales   92,191   –   –   –     92,191 Property management fees   8,747   –   –   –     8,747 Life insurance premiums   –   –   28,913   –     28,913 Property and casualty insurance premiums   –   23,357   –   (858) (c)   22,499 Net investment and interest income   675   6,182   30,942   (1,019) (b)   36,780 Other revenue   141,572   –   1,130   (124) (b)   142,578 Total revenues   1,576,999   29,539   60,985   (3,269)     1,664,254                         Costs and expenses:                       Operating expenses   682,329   10,768   5,223   (2,246) (b,c)   696,074 Commission expenses   127,896   –   –   –     127,896 Cost of sales   66,491   –   –   –     66,491 Benefits and losses   –   3,560   41,070   –     44,630 Amortization of deferred policy acquisition costs   –   –   6,750   –     6,750 Lease expense   8,024   22   29   (634) (b)   7,441 Depreciation, net of gains on disposal   135,748   –   –   –     135,748 Net losses on disposal of real estate   523   –   –   –     523 Total costs and expenses   1,021,011   14,350   53,072   (2,880)     1,085,553                         Earnings from operations before equity in earnings of subsidiaries   555,988   15,189   7,913   (389)     578,701                         Equity in earnings of subsidiaries   18,289   –   –   (18,289) (d)   –                         Earnings from operations   574,277   15,189   7,913   (18,678)     578,701 Other components of net periodic benefit costs   (280)   –   –   –     (280) Interest expense   (39,814)   –   (120)   389 (b)   (39,545) Pretax earnings   534,183   15,189   7,793   (18,289)     538,876 Income tax expense   (124,285)   (3,176)   (1,517)   –     (128,978) Earnings available to common stockholders $ 409,898 $ 12,013 $ 6,276 $ (18,289)   $ 409,898                         (a) Balances for the quarter ended June 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 $ 931,814 $ – $ – $ (784) (c) $ 931,030 Self-storage revenues   115,273   –   –   –     115,273 Self-moving and self-storage products and service sales   98,628   –   –   –     98,628 Property management fees   7,840   –   –   –     7,840 Life insurance premiums   –   –   31,057   –     31,057 Property and casualty insurance premiums   –   16,721   –   (852) (c)   15,869 Net investment and interest income   595   5,952   27,651   (865) (b)   33,333 Other revenue   91,168   –   852   (142) (b)   91,878 Total revenues   1,245,318   22,673   59,560   (2,643)     1,324,908                         Costs and expenses:                       Operating expenses   562,798   8,166   4,893   (1,774) (b,c)   574,083 Commission expenses   99,365   –   –   –     99,365 Cost of sales   60,933   –   –   –     60,933 Benefits and losses   –   2,438   43,014   –     45,452 Amortization of deferred policy acquisition costs   –   –   5,552   –     5,552 Lease expense   7,403   –   61   (594) (b)   6,870 Depreciation, net of gains on disposal   137,438   –   –   –     137,438 Net losses on disposal of real estate   3,425   –   –   –     3,425 Total costs and expenses   871,362   10,604   53,520   (2,368)     933,118                         Earnings from operations before equity in earnings of subsidiaries   373,956   12,069   6,040   (275)     391,790                         Equity in earnings of subsidiaries   14,338   –   –   (14,338) (d)   –                         Earnings from operations   388,294   12,069   6,040   (14,613)     391,790 Other components of net periodic benefit costs   (246)   –   –   –     (246) Interest expense   (40,800)   –   –   275 (b)   (40,525) Pretax earnings   347,248   12,069   6,040   (14,338)     351,019 Income tax expense   (80,883)   (2,554)   (1,217)   –     (84,654) Earnings available to common stockholders $ 266,365 $ 9,515 $ 4,823 $ (14,338)   $ 266,365                         (a) Balances for the quarter ended June 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 $ 2,216,542 $ – $ – $ (2,104) (c) $ 2,214,438 Self-storage revenues   290,878   –   –   –     290,878 Self-moving and self-storage products and service sales   197,076   –   –   –     197,076 Property management fees   17,196   –   –   –     17,196 Life insurance premiums   –   –   57,618   –     57,618 Property and casualty insurance premiums   –   40,800   –   (1,432) (c)   39,368 Net investment and interest income   1,355   12,195   60,266   (2,037) (b)   71,779 Other revenue   247,206   –   1,760   (209) (b)   248,757 Total revenues   2,970,253   52,995   119,644   (5,782)     3,137,110                         Costs and expenses:                       Operating expenses   1,284,160   19,581   10,598   (3,736) (b,c)   1,310,603 Commission expenses   241,045   –   –   –     241,045 Cost of sales   136,406   –   –   –     136,406 Benefits and losses   –   8,787   83,141   –     91,928 Amortization of deferred policy acquisition costs   –   –   15,573   –     15,573 Lease expense   16,101   206   53   (1,272) (b)   15,088 Depreciation, net of gains on disposal   257,465   –   –   –     257,465 Net gains on disposal of real estate   (3,907)   –   –   –     (3,907) Total costs and expenses   1,931,270   28,574   109,365   (5,008)     2,064,201                         Earnings from operations before equity in earnings of subsidiaries   1,038,983   24,421   10,279   (774)     1,072,909                         Equity in earnings of subsidiaries   27,408   –   –   (27,408) (d)   –                         Earnings from operations   1,066,391   24,421   10,279   (28,182)     1,072,909 Other components of net periodic benefit costs   (560)   –   –   –     (560) Interest expense   (79,257)   –   (240)   774 (b)   (78,723) Pretax earnings   986,574   24,421   10,039   (27,408)     993,626 Income tax expense   (231,501)   (5,106)   (1,946)   –     (238,553) Earnings available to common stockholders $ 755,073 $ 19,315 $ 8,093 $ (27,408)   $ 755,073                         (a) Balances for the six months ended June 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 $ 1,586,727 $ – $ – $ (1,412) (c) $ 1,585,315 Self-storage revenues   224,228   –   –   –     224,228 Self-moving and self-storage products and service sales   189,978   –   –   –     189,978 Property management fees   15,187   –   –   –     15,187 Life insurance premiums   –   –   61,965   –     61,965 Property and casualty insurance premiums   –   31,228   –   (1,625) (c)   29,603 Net investment and interest income   1,257   5,079   45,657   (1,678) (b)   50,315 Other revenue   154,241   –   1,591   (278) (b)   155,554 Total revenues   2,171,618   36,307   109,213   (4,993)     2,312,145                         Costs and expenses:                       Operating expenses   1,042,879   16,991   10,181   (3,306) (b,c)   1,066,745 Commission expenses   168,540   –   –   –     168,540 Cost of sales   113,764   –   –   –     113,764 Benefits and losses   –   6,468   78,561   –     85,029 Amortization of deferred policy acquisition costs   –   –   12,440   –     12,440 Lease expense   14,540   1   71   (1,139) (b)   13,473 Depreciation, net of gains on disposal   303,109   –   –   –     303,109 Net losses on disposal of real estate   3,169   –   –   –     3,169 Total costs and expenses   1,646,001   23,460   101,253   (4,445)     1,766,269                         Earnings from operations before equity in earnings of subsidiaries   525,617   12,847   7,960   (548)     545,876                         Equity in earnings of subsidiaries   16,733   –   –   (16,733) (d)   –                         Earnings from operations   542,350   12,847   7,960   (17,281)     545,876 Other components of net periodic benefit costs   (493)   –   –   –     (493) Interest expense   (80,594)   –   –   548 (b)   (80,046) Pretax earnings   461,263   12,847   7,960   (16,733)     465,337 Income tax expense   (107,172)   (2,716)   (1,358)   –     (111,246) Earnings available to common stockholders $ 354,091 $ 10,131 $ 6,602 $ (16,733)   $ 354,091                         (a) Balances for the six months ended June 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 $   755,073 $   19,315 $   8,093 $   (27,408)   $   755,073 Earnings from consolidated entities   (27,408)   –   –   27,408     – Adjustments to reconcile net earnings to the cash provided by operations:                       Depreciation   343,863   –   –   –     343,863 Amortization of deferred policy acquisition costs   –   –   15,573   –     15,573 Amortization of premiums and accretion of discounts related to investments, net   –   754   8,397   –     9,151 Amortization of debt issuance costs   2,791   –   –   –     2,791 Interest credited to policyholders   –   –   31,894   –     31,894 Change in allowance for losses on trade receivables   253   (30)   (1)   –     222 Change in allowance for inventories and parts reserve   8,352   –   –   –     8,352 Net gains on disposal of personal property   (86,398)   –   –   –     (86,398) Net gains on disposal of real estate   (3,907)   –   –   –     (3,907) Net gains on sales of investments   –   (207)   (3,225)   –     (3,432) Net gains on equity investments   –   (4,342)   –   –     (4,342) Deferred income taxes   140,780   865   (2,729)   –     138,916 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   6,159   (148)   (9,782)   –     (3,771) Inventories and parts   (45,718)   –   –   –     (45,718) Prepaid expenses   266,780   –   –   –     266,780 Capitalization of deferred policy acquisition costs   –   –   (17,807)   –     (17,807) Other assets   (1,033)   (179)   (115)   –     (1,327) Related party assets   (1,161)   (1,563)   –   –     (2,724) Accounts payable and accrued expenses   89,479   1,547   522   –     91,548 Policy benefits and losses, claims and loss expenses payable   15,250   174   3,544   –     18,968 Other policyholders' funds and liabilities   –   (222)   (1,255)   –     (1,477) Deferred income   8,626   –   (1,034)   –     7,592 Related party liabilities   543   (2,098)   855   –     (700) Net cash provided by operating activities   1,472,324   13,866   32,930   –     1,519,120                         Cash flows from investing activities:                       Escrow deposits   (2,341)   –   –   –     (2,341) Purchases of:                       Property, plant and equipment   (1,039,688)   –   –   –     (1,039,688) Short term investments   –   (21,669)   –   –     (21,669) Fixed maturities investments   –   (7,749)   (407,891)   –     (415,640) Equity securities   –   –   (36)   –     (36) Preferred stock   –   –   (8,000)   –     (8,000) Real estate   (12)   –   (112)   –     (124) Mortgage loans   (12)   (10,700)   (96,251)   –     (106,963) Proceeds from sales and paydowns of:                       Property, plant and equipment   306,946   –   –   –     306,946 Short term investments   –   16,594   79   –     16,673 Fixed maturities investments   –   10,728   219,315   –     230,043 Equity securities   –   –   1,894   –     1,894 Mortgage loans   –   565   26,047   –     26,612 Net cash used by investing activities   (735,107)   (12,231)   (264,955)   –     (1,012,293)     (page 1 of 2) (a) Balance for the period ended June 30, 2021                         Consolidating cash flow statements by industry segment for the six months ended September 30, 2021 are as follows:     Moving & Storage   Property & Casualty   Life   Elimination     AMERCO     (Unaudited) Cash flows from financing activities:   (In thousands) Borrowings from credit facilities   987,048   –   –   –     987,048 Principal repayments on credit facilities   (226,791)   –   (281)   –     (227,072) Payments of debt issuance costs   (2,092)   –   –   –     (2,092) Finance lease payments   (87,500)   –   –   –     (87,500) Common stock dividend paid   (19,608)   –   –   –     (19,608) Investment contract deposits   –   –   199,426   –     199,426 Investment contract withdrawals   –   –   (116,021)   –     (116,021) Net cash provided by financing activities   651,057   –   83,124   –     734,181                         Effects of exchange rate on cash   (4,787)   –   –   –     (4,787)                         Increase (decrease) in cash and cash equivalents   1,383,487   1,635   (148,901)   –     1,236,221 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 $   2,393,762 $   7,293 $   29,178 $   –   $   2,430,233     (page 2 of 2) (a) Balance for the period ended June 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 $   354,091 $   10,131 $   6,602 $   (16,733)   $   354,091 Earnings from consolidated entities   (16,733)   –   –   16,733     – Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   332,240   –   –   –     332,240 Amortization of deferred policy acquisition costs   –   –   12,440   –     12,440 Amortization of premiums and accretion of discounts related to investments, net   –   786   6,140   –     6,926 Amortization of debt issuance costs   2,755   –   –   –     2,755 Interest credited to policyholders   –   –   24,241   –     24,241 Change in allowance for losses on trade receivables   (139)   –   (1)   –     (140) Change in allowance for inventories and parts reserve   106   –   –   –     106 Net gains on disposal of personal property   (29,131)   –   –   –     (29,131) Net losses on disposal of real estate   3,169   –   –   –     3,169 Net gains on sales of investments   –   (28)   (1,260)   –     (1,288) Net losses on equity investments   –   2,254   –   –     2,254 Deferred income taxes   79,947   804   (553)   –     80,198 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (19,696)   1,848   (10,440)   –     (28,288) Inventories and parts   386   –   –   –     386 Prepaid expenses   116,064   –   –   –     116,064 Capitalization of deferred policy acquisition costs   –   –   (13,404)   –     (13,404) Other assets   (181)   10   (382)   –     (553) Related party assets   1,918   867   –   –     2,785 Accounts payable and accrued expenses   114,195   (2,618)   912   –     112,489 Policy benefits and losses, claims and loss expenses payable   14,300   (5,748)   8,023   –     16,575 Other policyholders' funds and liabilities   –   (5,093)   329   –     (4,764) Deferred income   10,245   –   2,992   –     13,237 Related party liabilities   1,652   (135)   (1,563)   –     (46) Net cash provided by operating activities   965,188   3,078   34,076   –     1,002,342                         Cash flows from investing activities:                       Escrow deposits   1,266   –   –   –     1,266 Purchases of:                       Property, plant and equipment   (662,259)   –   –   –     (662,259) Short term investments   –   (19,204)   (18)   –     (19,222) Fixed maturities investments   –   (3,505)   (157,250)   –     (160,755) Equity securities   –   –   (719)   –     (719) Preferred stock   –   –   (13,111)   –     (13,111) Real estate   –   –   (223)   –     (223) Mortgage loans   –   (14,145)   (58,171)   –     (72,316) Proceeds from sales and paydowns of:                       Property, plant and equipment   314,335   –   –   –     314,335 Short term investments   –   23,180   –   –     23,180 Fixed maturities investments   –   8,730   217,926   –     226,656 Equity securities   –   –   72   –     72 Mortgage loans   –   555   2,664   –     3,219 Net cash used by investing activities   (346,658)   (4,389)   (8,830)   –     (359,877)     (page 1 of 2) (a) Balance for the period ended June 30, 2020                           Consolidating cash flow statements by industry segment for the six months ended September 30, 2020 are as follows:       Moving & Storage   Property &   Life   Elimination     AMERCO     (Unaudited) Cash flows from financing activities:   (In thousands) Borrowings from credit facilities   576,123   –   9,600   –     585,723 Principal repayments on credit facilities   (377,062)   –   (9,717)   –     (386,779) Payment of debt issuance costs   (3,477)   –   –   –     (3,477) Finance lease payments   (122,720)   –   –   –     (122,720) Common stock dividend paid   (9,804)   –   –   –     (9,804) Net contribution from (to) related party   18,599   –   (18,599)   –     – Investment contract deposits   –   –   114,288   –     114,288 Investment contract withdrawals   –   –   (102,466)   –     (102,466) Net cash provided (used) by financing activities   81,659   –   (6,894)   –     74,765                         Effects of exchange rate on cash   3,986   –   –   –     3,986                         Increase (decrease) in cash and cash equivalents   704,175   (1,311)   18,352   –     721,216 Cash and cash equivalents at beginning of period   459,078   4,794   30,480   –     494,352 Cash and cash equivalents at end of period $   1,163,253 $   3,483 $   48,832 $   –   $   1,215,568     (page 2 of 2) (a) Balance for the period ended June 30, 2020             
v3.21.2
Industry Segment and Geographic Area Data (Table Text Block)
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 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 September 30, 2021             Total revenues $ 1,576,830 $ 87,424 $ 1,664,254 Depreciation and amortization, net of (gains) on disposal   141,956   1,065   143,021 Interest expense   38,588   957   39,545 Pretax earnings   521,658   17,218   538,876 Income tax expense   124,620   4,358   128,978 Identifiable assets   15,849,380   487,848   16,337,228               Quarter Ended September 30, 2020             Total revenues $ 1,261,235 $ 63,673 $ 1,324,908 Depreciation and amortization, net of (gains) on disposal   144,222   2,193   146,415 Interest expense   39,983   542   40,525 Pretax earnings   340,200   10,819   351,019 Income tax expense   81,624   3,030   84,654 Identifiable assets  13,693,016   430,462   14,123,478     United States   Canada   Consolidated     (Unaudited)     (All amounts are in thousands of U.S. $'s) Six Months Ended September 30, 2021             Total revenues $ 2,973,191 $ 163,919 $ 3,137,110 Depreciation and amortization, net of (gains) on disposal   269,606   (475)   269,131 Interest expense   76,716   2,007   78,723 Pretax earnings   959,607   34,019   993,626 Income tax expense   229,922   8,631   238,553 Identifiable assets   15,849,380   487,848   16,337,228               Six Months Ended September 30, 2020             Total revenues $ 2,204,038 $ 108,107 $ 2,312,145 Depreciation and amortization, net of (gains) on disposal   312,748   5,970   318,718 Interest expense   78,637   1,409   80,046 Pretax earnings   452,149   13,188   465,337 Income tax expense   107,407   3,839   111,246 Identifiable assets  13,693,016   430,462   14,123,478
v3.21.2
Employee Benefit Plans (Table Text Block)
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Compensation and Retirement Disclosure [Abstract]    
Components of Net Periodic Post Retirement Benefit Cost     Quarter Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 351 $   316 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   227   229 Other components   53   17 Total other components of net periodic benefit costs   280   246 Net periodic postretirement benefit cost$ 631 $  562     Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 701 $   633 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   454   459 Other components   106   34 Total other components of net periodic benefit costs   560   493 Net periodic postretirement benefit cost$ 1,261 $  1,126
v3.21.2
Fair Value Measurements (Table Text Block)
 6 Months Ended 12 Months Ended
Sep. 30, 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 September 30, 2021   Value   Level 1   Level 2   Level 3   Fair Value     (Unaudited) Assets   (In thousands) Reinsurance recoverables and trade receivables, net $ 227,935 $ – $ – $ 227,935 $ 227,935 Mortgage loans, net   471,566   –   –   471,566   471,566 Other investments   100,376   –   –   100,376   100,376 Total $ 799,877 $ – $ – $ 799,877 $ 799,877                                             Liabilities                     Notes, loans and finance leases payable   5,364,279   –   5,364,279   –   5,127,100 Total$ 5,364,279 $ – $ 5,364,279 $ – $ 5,127,100     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 September 30, 2021   Total   Level 1   Level 2   Level 3     (Unaudited) Assets   (In thousands) Short-term investments $ 2,215,846 $ 2,215,846 $ – $ – Fixed maturities - available for sale   2,790,243   6,721   2,783,407   115 Preferred stock   30,176   30,176   –   – Common stock   24,728   24,728   –   – Derivatives   5,754   5,754   –   – Total $ 5,066,747 $ 2,283,225 $ 2,783,407 $ 115                                     Liabilities                 Derivatives   3,292   –   3,292   – Total $ 3,292 $ – $ 3,292 $ – 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 $ –  
v3.21.2
Revenue Recognition (Table Text Block)
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Mar. 31, 2021
Revenue From Contract With Customer [Abstract]      
Disaggregation Of Revenue         Year Ended March 31,     2022   2023   2024   2025   2026   Thereafter     (Unaudited)     (In thousands)                           Self-moving equipment rentals $ 6,186 $ – $ – $ – $ – $ – Property lease revenues   16,213   12,287   8,560   6,161   4,581   48,866 Total$ 22,399 $ 12,287 $ 8,560 $ 6,161 $ 4,581 $ 48,866
Next five years and thereafter revenue     Quarter Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   108,038 $   69,346 Revenues recognized at a point in time:   110,924   114,854 Total revenues recognized under ASC 606   218,962   184,200           Revenues recognized under ASC 842   1,355,934   1,060,950 Revenues recognized under ASC 944   52,578   46,425 Revenues recognized under ASC 320   36,780   33,333 Total revenues$  1,664,254 $  1,324,908     Six Months Ended September 30,     2021   2020     (Unaudited)     (In thousands)           Revenues recognized over time: $   187,853 $   114,284 Revenues recognized at a point in time:   231,642   219,702 Total revenues recognized under ASC 606   419,495   333,986           Revenues recognized under ASC 842   2,546,944   1,835,644 Revenues recognized under ASC 944   98,892   92,200 Revenues recognized under ASC 320   71,779   50,315 Total revenues$  3,137,110 $  2,312,145  
v3.21.2
Allowance For Credit Losses (Table Text Block)
 6 Months Ended
Sep. 30, 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   531   (1,141)   8   (602) Write-offs against allowance   –   –   –   – Recoveries   –   –   –   – Balance as of September 30, 2021$ 3,366 $ 179 $ 509 $ 4,054
v3.21.2
Basis of Presentation (Narratives) (Details)
 3 Months Ended
Sep. 30, 2021
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]  
Number of reportable segments 3
v3.21.2
Investments (Narratives) (Details) - USD ($)
$ in Millions
 6 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Insurance Regulatory Authorites:    
Assets held by insurance regulators $ 25.4 $ 27.7
Available for sale securities:    
Fair value of sold available for sale securites 224.0  
Available-for-sale securities, gross realized gains 3.7  
Available-for-sale securities, gross realized losses $ 2.2  
v3.21.2
Investments (Available For Sale Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Available-for-sale Securities [Abstract]    
Amortized cost $ 2,586,674 $ 2,405,612
Gross Unrealized Gains 210,212 250,254
Gross unrealized losses more than 12 months (167) (224)
Gross unrealized losses less than 12 months (6,297) (784)
Allowance for Expected Credit Losses (179) (1,319)
Estimated market value 2,790,243 2,653,539
U.S. treasury securities and government obligations [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 103,378 92,429
Gross Unrealized Gains 9,917 12,941
Gross unrealized losses more than 12 months 0 0
Gross unrealized losses less than 12 months (508) 0
Allowance for Expected Credit Losses 0 0
Estimated market value 112,787 105,370
U.S. government agency mortgage-backed securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 58,978 61,427
Gross Unrealized Gains 478 911
Gross unrealized losses more than 12 months 0 (1)
Gross unrealized losses less than 12 months (1,890) (132)
Allowance for Expected Credit Losses 0 0
Estimated market value 57,566 62,205
Obligations of states and political subdivisions [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 203,429 230,521
Gross Unrealized Gains 19,461 25,249
Gross unrealized losses more than 12 months (76) (59)
Gross unrealized losses less than 12 months (283) (3)
Allowance for Expected Credit Losses 0 0
Estimated market value 222,531 255,708
Corporate securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 2,048,283 1,846,507
Gross Unrealized Gains 169,072 199,447
Gross unrealized losses more than 12 months (90) (163)
Gross unrealized losses less than 12 months (3,615) (641)
Allowance for Expected Credit Losses (179) (1,319)
Estimated market value 2,213,471 2,043,831
Mortgage-backed securities [Member]    
Available-for-sale Securities [Abstract]    
Amortized cost 172,606 174,728
Gross Unrealized Gains 11,284 11,706
Gross unrealized losses more than 12 months (1) (1)
Gross unrealized losses less than 12 months (1) (8)
Allowance for Expected Credit Losses 0 0
Estimated market value $ 183,888 $ 186,425
v3.21.2
Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Available-for-sale securities, amortized cost:    
Amortized cost $ 2,586,674 $ 2,405,612
Available-for-sale securities, fair value:    
Estimated market value 2,790,243 2,653,539
US Treasury Securities [Member]    
Available-for-sale securities, amortized cost:    
Due in one year or less 48,717 90,142
Due after one year through five years 575,511 562,442
Due after five years through ten years 693,842 672,733
Due after ten years 1,095,998 905,567
Amortized cost 2,414,068 2,230,884
Available-for-sale securities, fair value:    
Due in one year or less 49,480 91,190
Due after one year through five years 613,941 601,818
Due after five years through ten years 768,285 754,536
Due after ten years 1,174,649 1,019,570
Estimated market value 2,606,355 2,467,114
Mortgage-backed securities [Member]    
Available-for-sale securities, amortized cost:    
Amortized cost 172,606 174,728
Available-for-sale securities, fair value:    
Estimated market value $ 183,888 $ 186,425
v3.21.2
Investments (Available for sale equity investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Marketable Securities [Abstract]    
Amortized cost, equity investments $ 37,809 $ 29,809
Estimated market value, equity investments 54,904 42,117
Common stocks [Member]    
Marketable Securities [Abstract]    
Amortized cost, equity investments 9,775 9,775
Estimated market value, equity investments 24,728 20,440
Non-redeemable preferred stocks [Member]    
Marketable Securities [Abstract]    
Amortized cost, equity investments 28,034 20,034
Estimated market value, equity investments $ 30,176 $ 21,677
v3.21.2
Borrowings (Narratives) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Jun. 30, 2021
Debt instruments, face, payment, and remaining balance amount:            
Notes, loans and leases payable $ 5,335,278   $ 5,335,278   $ 4,668,907  
Debt instruments, issuance and maturity dates:            
Remaining Lease Term Finance Lease Weighted Average 3       3  
Interest paid related to derivative contracts [Abstract]            
Interest paid in cash $ 35,300 $ 39,100 71,400 $ 78,500    
Real estate loan [Member]            
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year 2023          
Real estate loans (revolving credit) [Member] | AMERCO [Member]            
Debt instruments, interest rate, effective percentage:            
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      
Real estate loans (revolving credit) [Member] | AMERCO [Member] | LIBOR            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.09%   0.09%      
Applicable margin interest rate 1.38%   1.38%      
Sum of LIBOR and margin, maximum rate 1.47%   1.47%      
Rental Truck (amortizing loans) First Loan [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.61%   1.61%      
Rental Truck (amortizing loans) First Loan [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 4.66%   4.66%      
Finance Lease [Member] | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Capitalized assets, net book value $ 753,000   $ 753,000   $ 877,000  
Lease Cost [Abstract]            
Sale Leaseback Transaction Lease Terms (7) year terms          
Finance Lease [Member] | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.92%   1.92%      
Finance Lease [Member] | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 5.04%   5.04%      
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 | AMERCO [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Amount held at fixed interest rates $ 600,000   $ 600,000      
New capital lease obligiations, amount $ 150,000          
Private Placement | AMERCO [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 2.43%   2.43%      
Private Placement | AMERCO [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 2.78%   2.78%      
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan [Member] | LIBOR            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.08%   0.08%      
Applicable margin interest rate 1.50%   1.50%      
Sum of LIBOR and margin, maximum rate 1.58%   1.58%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior Mortgages [Member]            
Debt instruments, interest rate, effective percentage:            
Debt Weighted Average Interest Rate 4.12%   4.12%      
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 2.76%   2.76%      
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 facility, maximum borrowing capacity $ 385,000   $ 385,000      
Line of credit, current borrowing capacity $ 385,000   $ 385,000      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member] | LIBOR            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.08%   0.08%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member] | LIBOR | Minimum [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.25%   1.25%      
Sum of LIBOR and margin, maximum rate 1.33%   1.33%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Working capital loans two [Member] | AMERCO [Member] | LIBOR | Maximum [Member]            
Debt instruments, interest rate, effective percentage:            
Applicable margin interest rate 1.50%   1.50%      
Sum of LIBOR and margin, maximum rate 1.58%   1.58%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 2.36%   2.36%      
Debt instruments, face, payment, and remaining balance amount:            
Line of credit, current borrowing capacity $ 590,000   $ 590,000      
Line of credit facility, remaining borrowing capacity 548,000   548,000      
Amount held at fixed interest rates 100,000   100,000      
Notes, loans and leases payable $ 373,000   $ 373,000      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | LIBOR | Minimum [Member]            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.08%   0.08%      
Applicable margin interest rate 1.15%   1.15%      
Sum of LIBOR and margin, maximum rate 1.24%   1.24%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | LIBOR | Maximum [Member]            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.09%   0.09%      
Applicable margin interest rate 1.25%   1.25%      
Sum of LIBOR and margin, maximum rate 1.33%   1.33%      
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | SOFR            
Debt instruments, interest rate, effective percentage:            
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 0.05%   0.05%      
Applicable margin interest rate 1.25%   1.25%      
Sum of LIBOR and margin, maximum rate 1.30%   1.30%      
Debt instruments, face, payment, and remaining balance amount:            
Amounts held at LIBOR plus margin $ 175,000   $ 175,000      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member]            
Debt instruments, face, payment, and remaining balance amount:            
Notes, loans and leases payable 89,500   89,500      
Subsidiary holdings of parent company debt $ 2,400   $ 2,400      
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Minimum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 1.75%   1.75%      
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year 2021          
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Maximum [Member]            
Debt instruments, interest rate, stated percentage:            
Debt instrument, interest rate, stated percentage 8.00%   8.00%      
Debt instruments, issuance and maturity dates:            
Debt instrument, maturity year 2049          
Life Insurance [Member] | Federal Home Loan Bank [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Aggregate deposit amount           $ 65,500
Available for sale equity securities, noncurrent           119,100
Available for sale equity securities pledged as collateral           $ 72,800
Life Insurance [Member] | Federal Home Loan Bank [Member] | Minimum [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Deposit interest rate           0.00%
Life Insurance [Member] | Federal Home Loan Bank [Member] | Maximum [Member]            
Federal Home Loan Bank, Advances, Activity for the year [Abstract]            
Deposit interest rate           1.72%
v3.21.2
Borrowings (Long-term Debt Borrowings) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Mar. 31, 2021
Debt instrument, maturities:      
Debt Instrument Carrying Amount $ 5,127,100 $ 5,127,100 $ 4,449,691
Notes, loans and finance/capital leases payable 5,364,279 5,364,279 4,698,615
Less: Debt issuance costs (29,001) (29,001) (29,708)
Total notes, loans and finance/capital leases payable, net $ 5,335,278 5,335,278 4,668,907
Real estate loan (amortizing term) [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year 2023    
Debt Instrument Carrying Amount $ 53,591 $ 53,591 82,913
Real estate loan (amortizing term) [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.58% 1.58%  
Senior Mortgages [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year range, start 2022    
Debt instrument, maturity year range, end 2038    
Debt Instrument Carrying Amount $ 2,186,376 $ 2,186,376 2,125,324
Senior Mortgages [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 2.76% 2.76%  
Senior Mortgages [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 5.50% 5.50%  
Real estate loans (revolving credit) [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year range, start 2023    
Debt instrument, maturity year range, end 2025    
Debt Instrument Carrying Amount $ 535,000 $ 535,000 535,000
Real estate loans (revolving credit) [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.33% 1.33%  
Real estate loans (revolving credit) [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 3.14% 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 $ 149,931 $ 149,931 176,295
Fleet loans (amortizing term) [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.61% 1.61%  
Fleet loans (amortizing term) [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 4.66% 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 $ 548,000 $ 548,000 535,000
Fleet loans (revolving credit) [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.24% 1.24%  
Fleet loans (revolving credit) [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.33% 1.33%  
Capital Leases (rental equipment) [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year range, start 2021    
Debt instrument, maturity year range, end 2026    
Debt Instrument Carrying Amount $ 426,155 $ 426,155 513,623
Capital Leases (rental equipment) [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.92% 1.92%  
Capital Leases (rental equipment) [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 5.04% 5.04%  
Finance capital lease [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year range, start   2024  
Debt instrument, maturity year range, end 2029    
Debt Instrument Carrying Amount $ 778,146 $ 778,146 644,375
Finance capital lease [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.60% 1.60%  
Finance capital lease [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 4.22% 4.22%  
Private Placement      
Debt instrument, maturities:      
Debt instrument, maturity year range, start 2029    
Debt instrument, maturity year range, end 2033    
Debt Instrument Carrying Amount $ 600,000 $ 600,000 0
Private Placement | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 2.43% 2.43%  
Private Placement | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 2.78% 2.78%  
Other Obligations [Member]      
Debt instrument, maturities:      
Debt instrument, maturity year range, start 2021    
Debt instrument, maturity year range, end 2049    
Debt Instrument Carrying Amount $ 87,080 $ 87,080 $ 86,085
Other Obligations [Member] | Minimum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 1.75% 1.75%  
Other Obligations [Member] | Maximum [Member]      
Debt instruments, interest rate, stated percentage:      
Debt instrument, interest rate, stated percentage 8.00% 8.00%  
v3.21.2
Borrowings (Annual Maturities of Notes, Loans and Leases Payable) (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Long-term debt, by Maturity:  
2021 $ 537,619
2022 502,285
2023 1,098,072
2024 547,975
2025 623,220
Thereafter $ 2,055,108
v3.21.2
Borrowings (Components of Interest Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Interest expense, borrowings:        
Interest expense $ 39,804 $ 41,600 $ 78,739 $ 83,511
Capitalized interest (2,722) (3,494) (4,752) (7,928)
Amortization of transaction costs 1,460 1,458 2,746 2,755
Interest expense resulting from derivatives 1,003 961 1,990 1,708
Total interest expense $ 39,545 $ 40,525 $ 78,723 $ 80,046
v3.21.2
Borrowings (Interest Rates and Company Borrowings) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Interest and debt expense:        
Weighted average interest rate during the quarter 1.39% 1.67% 1.38% 1.67%
Interest rate at quarter end 1.38% 1.67% 1.38% 1.67%
Maximum amount outstanding during the quarter $ 1,093,000 $ 1,105,000 $ 1,093,000 $ 1,175,000
Average amount outstanding during the quarter 1,090,283 1,059,130 1,081,716 1,109,978
Facility fees $ 61 $ 90 $ 131 $ 94
v3.21.2
Derivatives (Narratives) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Mar. 31, 2021
Interest Rate Derivatives [Abstract]        
Total notional amount of Company's variable interest rate swaps on debt $ 235,000   $ 235,000 $ 235,000
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months     $ 3,200  
Amounts reclassified from AOCI to interest expense $ (1,003) $ (961)    
v3.21.2
Derivatives (Interest rate contracts designated as hedging instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Interest Rate Fair Value Hedges [Abstract]    
Assets $ 0 $ 0
Liabilities 3,292 5,141
Notional amount (debt) $ 235,000 $ 235,000
v3.21.2
Derivatives (Effect of Interest Rate Contracts on the Statement of Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
The effect of interest rate contracts on the statement of operations:    
(Gain) loss recognized in AOCI on interest rate contracts (effective portion) $ (929) $ (1,007)
Amounts reclassified from AOCI to interest expense $ (1,003) $ (961)
v3.21.2
Comprehensive Income (Loss) (Accumulated other comprehensive income (loss) components of net of tax) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]        
Balance as of March 31, 2020     $ 106,857  
Foreign currency translation $ 992 $ 290 (2,400) $ (2,627)
Unrealized net gain on investments 41,382 90,839 (31,645) 45,340
Change in fair value of cash flow hedges (56) 35 (107) (497)
Amount reclassified from AOCI 757 724 1,502 1,288
Other comprehensive income (loss) 43,075 91,888 (32,650) 43,504
Balance as of September 30, 2020 74,207   74,207  
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     (2,400)  
Unrealized net gain on investments     0  
Change in fair value of cash flow hedges     0  
Amount reclassified from AOCI     0  
Other comprehensive income (loss)     (2,400)  
Balance as of September 30, 2020 (55,329)   (55,329)  
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     (31,645)  
Change in fair value of cash flow hedges     0  
Amount reclassified from AOCI     0  
Other comprehensive income (loss)     (31,645)  
Balance as of September 30, 2020 136,008   136,008  
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     (107)  
Amount reclassified from AOCI     1,502  
Other comprehensive income (loss)     1,395  
Balance as of September 30, 2020 (2,484)   (2,484)  
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 September 30, 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 992 290 (2,400) (2,627)
Unrealized net gain on investments 41,382 90,839 (31,645) 45,340
Change in fair value of cash flow hedges (56) 35 (107) (497)
Amount reclassified from AOCI 757 $ 724 1,502 $ 1,288
Other comprehensive income (loss)     (32,650)  
Balance as of September 30, 2020 $ 74,207   $ 74,207  
v3.21.2
Stockholders' Equity (Narratives) (Details)
 6 Months Ended
Sep. 30, 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
v3.21.2
Leases (Narratives) (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Leases [Abstract]      
Right Of Use Asset Obtained In Exchange For Operating Lease Liability $ 426.2   $ 513.6
Right Of Use Asset Obtained In Exchange For Finance Lease Liability 85.2   $ 92.5
Cash paid for operating leases 15.2 $ 14.2  
Cash paid for finance leases $ 87.5 $ 122.7  
v3.21.2
Leases (Components of our right-of-use assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Finance Lease [Abstract]    
Buildings and Improvements $ 136,568 $ 132,901
Furniture and equipment 18,316 22,316
Rental trailers and other rental equipment 182,741 203,594
Rental trucks 1,325,624 1,494,098
Right-of-use assets, gross 1,663,249 1,852,909
Less: Accumulated depreciation (825,022) (883,366)
Right of use assets, net 838,227 969,543
Finance Lease [Member]    
Finance Lease [Abstract]    
Buildings and Improvements 0 0
Furniture and equipment 18,316 22,316
Rental trailers and other rental equipment 182,741 203,594
Rental trucks 1,325,624 1,494,098
Right-of-use assets, gross 1,526,681 1,720,008
Less: Accumulated depreciation (773,691) (842,970)
Right of use assets, net 752,990 877,038
Operating Lease [Member]    
Finance Lease [Abstract]    
Buildings and Improvements 136,568 132,901
Furniture and equipment 0 0
Rental trailers and other rental equipment 0 0
Rental trucks 0 0
Right-of-use assets, gross 136,568 132,901
Less: Accumulated depreciation (51,331) (40,396)
Right of use assets, net $ 85,237 $ 92,505
v3.21.2
Leases (Finance Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 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 3.60% 3.60%
v3.21.2
Leases (Operating Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Operating Leases Remaining Lease Term And Weighted Average Discount Rate [Abstract]    
Remaining Lease Term Operating Lease Weighted Average 15.2 14.7
Operating Lease Weighted Average Discount Rate Percent 4.60% 4.60%
v3.21.2
Leases (Components Of Lease Expense) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Lease cost:    
Operating lease costs $ 16,101 $ 14,540
Finance lease cost:    
Amortization of right of use assets 62,243 79,259
Interest on lease liabilities 8,780 12,082
Total finance lease cost $ 71,023 $ 91,341
v3.21.2
Leases (Maturities Of Lease Liabilities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Finance Lease Liabilities Payments Due [Abstract]    
2022 $ 155,818  
2023 129,840  
2024 87,728  
2025 62,633  
2026 20,956  
Thereafter 0  
Total lease payments 456,975  
Less: imputed interest (30,820)  
Financing lease liability 426,155  
Operating Lease Liabilities Payments Due [Abstract]    
2022 24,757  
2023 22,610  
2024 17,921  
2025 6,045  
2026 3,135  
Thereafter 60,834  
Total lease payments 135,302  
Less: inputed interest (50,103)  
Operating lease liability $ 85,199 $ 92,510
v3.21.2
Contingencies (Narratives) (Details)
$ in Millions
 6 Months Ended
Sep. 30, 2021
USD ($)
Covid 19 Pandemic  
Unusual Or Infrequent Item Net Gain Loss [Abstract]  
CARES act, estimated refund amount $ 366.0
v3.21.2
Related Party Transactions (Narratives) (Details) - USD ($)
$ in Millions
 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member]    
Property Management Fee [Abstract]    
Property Management Fee Revenue $ 19.4 $ 17.5
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 $ 14.6  
Expenses, related parties 1.2  
Cash flow, related party 13.3  
Revenue generated by the dealer agreement from related parties 234.6  
Commission expenses, generated from dealer agreement with related parties $ 49.4  
v3.21.2
Related Party Transactions (Related Party Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Related party transactions:        
Management fee revenue $ 8,747 $ 7,840 $ 17,196 $ 15,187
Revenue from related parties 8,747 7,840 17,196 15,187
Blackwater [Member]        
Related party transactions:        
Management fee revenue 7,428 6,644 14,608 12,792
Mercury [Member]        
Related party transactions:        
Management fee revenue $ 1,319 $ 1,196 $ 2,588 $ 2,395
v3.21.2
Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Related party cost and expense:        
Related party expenses, total $ 27,147 $ 21,191 $ 50,653 $ 37,180
Blackwater [Member]        
Related party cost and expense:        
U-Haul lease expenses 611 658 1,237 1,315
U-Haul commission expenses $ 26,536 $ 20,533 $ 49,416 $ 35,865
v3.21.2
Related Party Transactions (Related Party Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Related party assets:    
Related party assets $ 38,773 $ 35,395
Blackwater [Member]    
Related party assets:    
Notes receivable 34,189 27,116
Mercury [Member]    
Related party assets:    
Notes receivable 4,610 9,632
Insurance Group [Member]    
Related party assets:    
Amounts due to related parties $ (26) $ (1,353)
v3.21.2
Consolidating financial information by industry segment (Balance Sheets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Mar. 31, 2020
ASSETS:        
Cash and cash equivalents $ 2,430,233 $ 1,194,012 $ 1,215,568 $ 494,352
Reinsurance recoverables and trade receivables, net 227,935 224,426    
Inventories, net 142,955 105,577    
Prepaid expenses 202,339 469,144    
Investments, fixed maturities and marketable equities 2,845,147 2,695,656    
Investments, other 571,942 489,759    
Deferred policy acquisition costs, net 97,138 89,749    
Other assets 51,626 47,730    
Right of use Assets - Financing 752,990 877,038    
Right of use Assets - Operating 85,237 92,505    
Related party assets 38,773 35,395    
Subtotal assets 7,446,315 6,320,991    
Investments in subsidiaries 0 0    
Property, plant and equipment, at cost:        
Land 1,172,648 1,075,813    
Buildings and improvements 5,477,544 5,163,705    
Furniture and equipment 811,337 786,505    
Property, plant and equipment (gross) 12,277,075 11,413,668    
Less: Accumulated depreciation (3,386,162) (3,083,053)    
Total property, plant and equipment 8,890,913 8,330,615    
Total assets 16,337,228 14,651,606 14,123,478  
Liabilities:        
Accounts payable and accrued expenses 694,284 645,575    
Notes, loans and leases payable 5,335,278 4,668,907    
Operating lease liability 85,199 92,510    
Policy benefits and losses, claims and loss expenses payable 1,016,505 997,701    
Liabilities from investment contracts 2,276,829 2,161,530    
Other policyholders' funds and liabilities 10,943 12,420    
Deferred income 51,212 42,592    
Deferred income taxes, net 1,312,281 1,178,489    
Related party liabilities 0 0    
Total liabilities 10,782,531 9,799,724    
Stockholders' equity:        
Additional paid-in capital 453,819 453,819    
Accumulated other comprehensive loss 74,207 106,857    
Retained earnings 5,693,824 4,958,359    
Total stockholders' equity 5,554,697 4,851,882    
Total liabilities and stockholders' equity 16,337,228 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 536,814 477,921    
Rental Trucks [Member]        
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 4,278,732 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 2,393,762 1,010,275 1,163,253 459,078
Reinsurance recoverables and trade receivables, net 112,319 118,741    
Inventories, net 142,955 105,577    
Prepaid expenses 202,339 469,144    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 20,745 20,733    
Deferred policy acquisition costs, net 0 0    
Other assets 48,190 44,763    
Right of use Assets - Financing 752,990 877,038    
Right of use Assets - Operating 84,949 92,245    
Related party assets 55,175 54,042    
Subtotal assets 3,813,424 2,792,558    
Investments in subsidiaries 738,116 741,860    
Property, plant and equipment, at cost:        
Land 1,172,648 1,075,813    
Buildings and improvements 5,477,544 5,163,705    
Furniture and equipment 811,337 786,505    
Property, plant and equipment (gross) 12,277,075 11,413,668    
Less: Accumulated depreciation (3,386,162) (3,083,053)    
Total property, plant and equipment 8,890,913 8,330,615    
Total assets 13,442,453 11,865,033    
Liabilities:        
Accounts payable and accrued expenses 685,563 636,257    
Notes, loans and leases payable 5,324,373 4,657,720    
Operating lease liability 84,905 92,236    
Policy benefits and losses, claims and loss expenses payable 442,160 427,073    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 51,212 42,592    
Deferred income taxes, net 1,277,383 1,136,149    
Related party liabilities 25,956 25,413    
Total liabilities 7,891,552 7,017,440    
Stockholders' equity:        
Additional paid-in capital 454,029 454,029    
Accumulated other comprehensive loss 70,411 102,568    
Retained earnings 5,693,614 4,958,149    
Total stockholders' equity 5,550,901 4,847,593    
Total liabilities and stockholders' equity 13,442,453 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 536,814 477,921    
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 4,278,732 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 7,293 5,658 3,483 4,794
Reinsurance recoverables and trade receivables, net 67,217 67,069    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 292,986 295,753    
Investments, other 105,474 90,412    
Deferred policy acquisition costs, net 0 0    
Other assets 755 436    
Right of use Assets - Financing 0 0    
Right of use Assets - Operating 155 92    
Related party assets 8,294 6,854    
Subtotal assets 482,174 466,274    
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 482,174 466,274    
Liabilities:        
Accounts payable and accrued expenses 3,575 2,029    
Notes, loans and leases payable 0 0    
Operating lease liability 152 96    
Policy benefits and losses, claims and loss expenses payable 179,116 178,942    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 3,476 3,698    
Deferred income 0 0    
Deferred income taxes, net 13,152 13,046    
Related party liabilities 3,600 5,821    
Total liabilities 203,071 203,632    
Stockholders' equity:        
Additional paid-in capital 91,120 91,120    
Accumulated other comprehensive loss 19,692 22,546    
Retained earnings 164,990 145,675    
Total stockholders' equity 279,103 262,642    
Total liabilities and stockholders' equity 482,174 466,274    
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 29,178 178,079 48,832 30,480
Reinsurance recoverables and trade receivables, net 48,399 38,616    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 2,552,161 2,399,903    
Investments, other 445,723 378,614    
Deferred policy acquisition costs, net 97,138 89,749    
Other assets 2,681 2,531    
Right of use Assets - Financing 0 0    
Right of use Assets - Operating 133 168    
Related party assets 14,325 13,850    
Subtotal assets 3,189,738 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 3,189,738 3,101,510    
Liabilities:        
Accounts payable and accrued expenses 5,146 7,289    
Notes, loans and leases payable 10,905 11,187    
Operating lease liability 142 178    
Policy benefits and losses, claims and loss expenses payable 395,229 391,686    
Liabilities from investment contracts 2,276,829 2,161,530    
Other policyholders' funds and liabilities 7,467 8,722    
Deferred income 0 0    
Deferred income taxes, net 21,746 29,294    
Related party liabilities 13,261 12,406    
Total liabilities 2,730,725 2,622,292    
Stockholders' equity:        
Additional paid-in capital 26,271 26,271    
Accumulated other comprehensive loss 112,519 140,817    
Retained earnings 317,723 309,630    
Total stockholders' equity 459,013 479,218    
Total liabilities and stockholders' equity 3,189,738 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 (39,021) (39,351)    
Subtotal assets (39,021) (39,351)    
Investments in subsidiaries (738,116) (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 (777,137) (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 (42,817) (43,640)    
Total liabilities (42,817) (43,640)    
Stockholders' equity:        
Additional paid-in capital (117,601) (117,601)    
Accumulated other comprehensive loss (128,415) (159,074)    
Retained earnings (482,503) (455,095)    
Total stockholders' equity (734,320) (737,571)    
Total liabilities and stockholders' equity (777,137) (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    
v3.21.2
Consolidating financial information by industry segment (Statements of Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenues:        
Self-moving equipment rentals $ 1,179,061 $ 931,030 $ 2,214,438 $ 1,585,315
Self-storage revenues 153,485 115,273 290,878 224,228
Self moving and self-storage products and service sales 92,191 98,628 197,076 189,978
Property management fees 8,747 7,840 17,196 15,187
Life insurance premiums 28,913 31,057 57,618 61,965
Property and casualty insurance premiums 22,499 15,869 39,368 29,603
Net investment and Interest income 36,780 33,333 71,779 50,315
Other revenue 142,578 91,878 248,757 155,554
Total revenues 1,664,254 1,324,908 3,137,110 2,312,145
Costs and expenses:        
Operating expenses 696,074 574,083 1,310,603 1,066,745
Commission expenses 127,896 99,365 241,045 168,540
Cost of sales 66,491 60,933 136,406 113,764
Benefits and losses 44,630 45,452 91,928 85,029
Amortization of deferred policy acquisition costs 6,750 5,552 15,573 12,440
Lease expense 7,441 6,870 15,088 13,473
Depreciation, net of (gains) losses on disposals 135,748 137,438 257,465 303,109
Net (gains) losses on disposal of real estate 523 3,425 (3,907) 3,169
Total costs and expenses 1,085,553 933,118 2,064,201 1,766,269
Earnings (loss) from operations before equity in earnings of subsidiaries 578,701 391,790 1,072,909 545,876
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 578,701 391,790 1,072,909 545,876
Other components of net periodic benefit costs (280) (246) (560) (493)
Interest expense (39,545) (40,525) (78,723) (80,046)
Pretax earnings 538,876 351,019 993,626 465,337
Income tax expense (128,978) (84,654) (238,553) (111,246)
Earnings available to common stockholders 409,898 266,365 755,073 354,091
Operating Segments [Member] | Moving and Storage Consolidations [Member]        
Revenues:        
Self-moving equipment rentals 1,180,329 931,814 2,216,542 1,586,727
Self-storage revenues 153,485 115,273 290,878 224,228
Self moving and self-storage products and service sales 92,191 98,628 197,076 189,978
Property management fees 8,747 7,840 17,196 15,187
Life insurance premiums 0 0 0 0
Property and casualty insurance premiums 0 0 0 0
Net investment and Interest income 675 595 1,355 1,257
Other revenue 141,572 91,168 247,206 154,241
Total revenues 1,576,999 1,245,318 2,970,253 2,171,618
Costs and expenses:        
Operating expenses 682,329 562,798 1,284,160 1,042,879
Commission expenses 127,896 99,365 241,045 168,540
Cost of sales 66,491 60,933 136,406 113,764
Benefits and losses 0 0 0 0
Amortization of deferred policy acquisition costs 0 0 0 0
Lease expense 8,024 7,403 16,101 14,540
Depreciation, net of (gains) losses on disposals 135,748 137,438 257,465 303,109
Net (gains) losses on disposal of real estate 523 3,425 (3,907) 3,169
Total costs and expenses 1,021,011 871,362 1,931,270 1,646,001
Earnings (loss) from operations before equity in earnings of subsidiaries 555,988 373,956 1,038,983 525,617
Equity in earnings of subsidiaries 18,289 14,338 27,408 16,733
Earnings from operations 574,277 388,294 1,066,391 542,350
Other components of net periodic benefit costs (280) (246) (560) (493)
Interest expense (39,814) (40,800) (79,257) (80,594)
Pretax earnings 534,183 347,248 986,574 461,263
Income tax expense (124,285) (80,883) (231,501) (107,172)
Earnings available to common stockholders 409,898 266,365 755,073 354,091
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 23,357 16,721 40,800 31,228
Net investment and Interest income 6,182 5,952 12,195 5,079
Other revenue 0 0 0 0
Total revenues 29,539 22,673 52,995 36,307
Costs and expenses:        
Operating expenses 10,768 8,166 19,581 16,991
Commission expenses 0 0 0 0
Cost of sales 0 0 0 0
Benefits and losses 3,560 2,438 8,787 6,468
Amortization of deferred policy acquisition costs 0 0 0 0
Lease expense 22 0 206 1
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 14,350 10,604 28,574 23,460
Earnings (loss) from operations before equity in earnings of subsidiaries 15,189 12,069 24,421 12,847
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 15,189 12,069 24,421 12,847
Other components of net periodic benefit costs 0 0 0 0
Interest expense 0 0 0 0
Pretax earnings 15,189 12,069 24,421 12,847
Income tax expense (3,176) (2,554) (5,106) (2,716)
Earnings available to common stockholders 12,013 9,515 19,315 10,131
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 28,913 31,057 57,618 61,965
Property and casualty insurance premiums 0 0 0 0
Net investment and Interest income 30,942 27,651 60,266 45,657
Other revenue 1,130 852 1,760 1,591
Total revenues 60,985 59,560 119,644 109,213
Costs and expenses:        
Operating expenses 5,223 4,893 10,598 10,181
Commission expenses 0 0 0 0
Cost of sales 0 0 0 0
Benefits and losses 41,070 43,014 83,141 78,561
Amortization of deferred policy acquisition costs 6,750 5,552 15,573 12,440
Lease expense 29 61 53 71
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 53,072 53,520 109,365 101,253
Earnings (loss) from operations before equity in earnings of subsidiaries 7,913 6,040 10,279 7,960
Equity in earnings of subsidiaries 0 0 0 0
Earnings from operations 7,913 6,040 10,279 7,960
Other components of net periodic benefit costs 0 0 0 0
Interest expense (120) 0 (240) 0
Pretax earnings 7,793 6,040 10,039 7,960
Income tax expense (1,517) (1,217) (1,946) (1,358)
Earnings available to common stockholders 6,276 4,823 8,093 6,602
Consolidation, Eliminations [Member]        
Revenues:        
Self-moving equipment rentals (1,268) (784) (2,104) (1,412)
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 (858) (852) (1,432) (1,625)
Net investment and Interest income (1,019) (865) (2,037) (1,678)
Other revenue (124) (142) (209) (278)
Total revenues (3,269) (2,643) (5,782) (4,993)
Costs and expenses:        
Operating expenses (2,246) (1,774) (3,736) (3,306)
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 (634) (594) (1,272) (1,139)
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 (2,880) (2,368) (5,008) (4,445)
Earnings (loss) from operations before equity in earnings of subsidiaries (389) (275) (774) (548)
Equity in earnings of subsidiaries (18,289) (14,338) (27,408) (16,733)
Earnings from operations (18,678) (14,613) (28,182) (17,281)
Other components of net periodic benefit costs 0 0 0 0
Interest expense 389 275 774 548
Pretax earnings (18,289) (14,338) (27,408) (16,733)
Income tax expense 0 0 0 0
Earnings available to common stockholders $ (18,289) $ (14,338) $ (27,408) $ (16,733)
v3.21.2
Consolidating financial information by industry segment (Cash Flow Statements) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Cash flow from operating activities:        
Net earnings $ 409,898 $ 266,365 $ 755,073 $ 354,091
Earnings from consolidated entities     0 0
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     343,863 332,240
Amortization of deferred policy acquisition costs 6,750 5,552 15,573 12,440
Amortization of premiums and accretion of discounts related to investments, net     9,151 6,926
Amortization of debt issuance costs     2,791 2,755
Interest credited to policyholders     31,894 24,241
Change in allowance for losses on trade receivables     222 (140)
Change in allowance for inventory reserves     8,352 106
Net gain on sale of real and personal property     (86,398) (29,131)
Net losses on disposal of real estate 523 3,425 (3,907) 3,169
Net (gain) loss on sale of investments     (3,432) (1,288)
Net losses on equity investments     (4,342) 2,254
Deferred income tax     138,916 80,198
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     (3,771) (28,288)
Inventories     (45,718) 386
Prepaid expenses     266,780 116,064
Capitalization of deferred policy acquisition costs     (17,807) (13,404)
Other assets     (1,327) (553)
Related party assets     (2,724) 2,785
Accounts payable and accrued expenses     91,548 112,489
Policy benefits and losses, claims and loss expenses payable     18,968 16,575
Other policyholders' funds and liabilities     (1,477) (4,764)
Deferred income     7,592 13,237
Related party liabilities     (700) (46)
Net cash provided by operating activities     1,519,120 1,002,342
Cash flow from investing activities:        
Escrow deposits     (2,341) 1,266
Purchase of:        
Property, plant and equipment     (1,039,688) (662,259)
Short term investments     (21,669) (19,222)
Fixed maturity investments     (415,640) (160,755)
Equity securities     (36) (719)
Preferred stock     (8,000) (13,111)
Real estate     (124) (223)
Mortgage loans     (106,963) (72,316)
Proceeds from sale of:        
Property, plant and equipment     306,946 314,335
Short term investments     16,673 23,180
Fixed maturity investments     230,043 226,656
Preferred stock     1,894 72
Mortgage loans     26,612 3,219
Net cash used by investing activities     (1,012,293) (359,877)
Cash flow from financing activities:        
Borrowings from credit facilities     987,048 585,723
Principal repayments on credit facilities     (227,072) (386,779)
Payment of debt issuance costs     (2,092) (3,477)
Capital lease payments     (87,500) (122,720)
Common stock dividends paid     (19,608) (9,804)
Net contribution from (to) related party       0
Investment contract deposits     199,426 114,288
Investment contract withdrawals     (116,021) (102,466)
Net cash provided by (used in) financing activities     734,181 74,765
Effects on exchange rate on cash     (4,787) 3,986
Increase (decrease) in cash and cash equivalents     1,236,221 721,216
Cash and cash equivalents at the beginning of period     1,194,012 494,352
Cash and cash equivalents at the end of the period 2,430,233 1,215,568 2,430,233 1,215,568
Operating Segments [Member] | Moving and Storage Consolidations [Member]        
Cash flow from operating activities:        
Net earnings 409,898 266,365 755,073 354,091
Earnings from consolidated entities     (27,408) (16,733)
Adjustments to reconcile net earnings to cash provided by operations:        
Depreciation     343,863 332,240
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     2,791 2,755
Interest credited to policyholders     0 0
Change in allowance for losses on trade receivables     253 (139)
Change in allowance for inventory reserves     8,352 106
Net gain on sale of real and personal property     (86,398) (29,131)
Net losses on disposal of real estate 523 3,425 (3,907) 3,169
Net (gain) loss on sale of investments     0 0
Net losses on equity investments     0 0
Deferred income tax     140,780 79,947
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     6,159 (19,696)
Inventories     (45,718) 386
Prepaid expenses     266,780 116,064
Capitalization of deferred policy acquisition costs     0 0
Other assets     (1,033) (181)
Related party assets     (1,161) 1,918
Accounts payable and accrued expenses     89,479 114,195
Policy benefits and losses, claims and loss expenses payable     15,250 14,300
Other policyholders' funds and liabilities     0 0
Deferred income     8,626 10,245
Related party liabilities     543 1,652
Net cash provided by operating activities     1,472,324 965,188
Cash flow from investing activities:        
Escrow deposits     (2,341) 1,266
Purchase of:        
Property, plant and equipment     (1,039,688) (662,259)
Short term investments     0 0
Fixed maturity investments     0 0
Equity securities     0 0
Preferred stock     0 0
Real estate     (12) 0
Mortgage loans     (12) 0
Proceeds from sale of:        
Property, plant and equipment     306,946 314,335
Short term investments     0 0
Fixed maturity investments     0 0
Preferred stock     0 0
Mortgage loans     0 0
Net cash used by investing activities     (735,107) (346,658)
Cash flow from financing activities:        
Borrowings from credit facilities     987,048 576,123
Principal repayments on credit facilities     (226,791) (377,062)
Payment of debt issuance costs     (2,092) (3,477)
Capital lease payments     (87,500) (122,720)
Common stock dividends paid     (19,608) (9,804)
Net contribution from (to) related party       18,599
Investment contract deposits     0 0
Investment contract withdrawals     0 0
Net cash provided by (used in) financing activities     651,057 81,659
Effects on exchange rate on cash     (4,787) 3,986
Increase (decrease) in cash and cash equivalents     1,383,487 704,175
Cash and cash equivalents at the beginning of period     1,010,275 459,078
Cash and cash equivalents at the end of the period 2,393,762 1,163,253 2,393,762 1,163,253
Operating Segments [Member] | Property and Casualty Insurance [Member]        
Cash flow from operating activities:        
Net earnings 12,013 9,515 19,315 10,131
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     754 786
Amortization of debt issuance costs     0 0
Interest credited to policyholders     0 0
Change in allowance for losses on trade receivables     (30) 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     (207) (28)
Net losses on equity investments     (4,342) 2,254
Deferred income tax     865 804
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     (148) 1,848
Inventories     0 0
Prepaid expenses     0 0
Capitalization of deferred policy acquisition costs     0 0
Other assets     (179) 10
Related party assets     (1,563) 867
Accounts payable and accrued expenses     1,547 (2,618)
Policy benefits and losses, claims and loss expenses payable     174 (5,748)
Other policyholders' funds and liabilities     (222) (5,093)
Deferred income     0 0
Related party liabilities     (2,098) (135)
Net cash provided by operating activities     13,866 3,078
Cash flow from investing activities:        
Escrow deposits     0 0
Purchase of:        
Property, plant and equipment     0 0
Short term investments     (21,669) (19,204)
Fixed maturity investments     (7,749) (3,505)
Equity securities     0 0
Preferred stock     0 0
Real estate     0 0
Mortgage loans     (10,700) (14,145)
Proceeds from sale of:        
Property, plant and equipment     0 0
Short term investments     16,594 23,180
Fixed maturity investments     10,728 8,730
Preferred stock     0 0
Mortgage loans     565 555
Net cash used by investing activities     (12,231) (4,389)
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
Common stock dividends paid     0 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 on exchange rate on cash     0 0
Increase (decrease) in cash and cash equivalents     1,635 (1,311)
Cash and cash equivalents at the beginning of period     5,658 4,794
Cash and cash equivalents at the end of the period 7,293 3,483 7,293 3,483
Operating Segments [Member] | Life Insurance [Member]        
Cash flow from operating activities:        
Net earnings 6,276 4,823 8,093 6,602
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 6,750 5,552 15,573 12,440
Amortization of premiums and accretion of discounts related to investments, net     8,397 6,140
Amortization of debt issuance costs     0 0
Interest credited to policyholders     31,894 24,241
Change in allowance for losses on trade receivables     (1) (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     (3,225) (1,260)
Net losses on equity investments     0 0
Deferred income tax     (2,729) (553)
Net change in other operating assets and liabilities:        
Reinsurance recoverables and trade receivables     (9,782) (10,440)
Inventories     0 0
Prepaid expenses     0 0
Capitalization of deferred policy acquisition costs     (17,807) (13,404)
Other assets     (115) (382)
Related party assets     0 0
Accounts payable and accrued expenses     522 912
Policy benefits and losses, claims and loss expenses payable     3,544 8,023
Other policyholders' funds and liabilities     (1,255) 329
Deferred income     (1,034) 2,992
Related party liabilities     855 (1,563)
Net cash provided by operating activities     32,930 34,076
Cash flow from investing activities:        
Escrow deposits     0 0
Purchase of:        
Property, plant and equipment     0 0
Short term investments     0 (18)
Fixed maturity investments     (407,891) (157,250)
Equity securities     (36) (719)
Preferred stock     (8,000) (13,111)
Real estate     (112) (223)
Mortgage loans     (96,251) (58,171)
Proceeds from sale of:        
Property, plant and equipment     0 0
Short term investments     79 0
Fixed maturity investments     219,315 217,926
Preferred stock     1,894 72
Mortgage loans     26,047 2,664
Net cash used by investing activities     (264,955) (8,830)
Cash flow from financing activities:        
Borrowings from credit facilities     0 9,600
Principal repayments on credit facilities     (281) (9,717)
Payment of debt issuance costs     0 0
Capital lease payments     0 0
Common stock dividends paid     0 0
Net contribution from (to) related party       (18,599)
Investment contract deposits     199,426 114,288
Investment contract withdrawals     (116,021) (102,466)
Net cash provided by (used in) financing activities     83,124 (6,894)
Effects on exchange rate on cash     0 0
Increase (decrease) in cash and cash equivalents     (148,901) 18,352
Cash and cash equivalents at the beginning of period     178,079 30,480
Cash and cash equivalents at the end of the period 29,178 48,832 29,178 48,832
Consolidation, Eliminations [Member]        
Cash flow from operating activities:        
Net earnings (18,289) (14,338) (27,408) (16,733)
Earnings from consolidated entities     27,408 16,733
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 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
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
Common stock dividends paid     0 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 on 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
v3.21.2
Industry Segment and Geographic Area Data (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Quarter ended:          
Total revenues $ 1,664,254 $ 1,324,908 $ 3,137,110 $ 2,312,145  
Depreciation and amortization, net of (gains) losses on disposals 143,021 146,415 269,131 318,718  
Interest expense 39,545 40,525 78,723 80,046  
Pretax earnings (loss) 538,876 351,019 993,626 465,337  
Income tax expense 128,978 84,654 238,553 111,246  
Identifiable assets 16,337,228 14,123,478 16,337,228 14,123,478 $ 14,651,606
United States [Member]          
Quarter ended:          
Total revenues 1,576,830 1,261,235 2,973,191 2,204,038  
Depreciation and amortization, net of (gains) losses on disposals 141,956 144,222 269,606 312,748  
Interest expense 38,588 39,983 76,716 78,637  
Pretax earnings (loss) 521,658 340,200 959,607 452,149  
Income tax expense 124,620 81,624 229,922 107,407  
Identifiable assets 15,849,380 13,693,016 15,849,380 13,693,016  
Canada [Member]          
Quarter ended:          
Total revenues 87,424 63,673 163,919 108,107  
Depreciation and amortization, net of (gains) losses on disposals 1,065 2,193 (475) 5,970  
Interest expense 957 542 2,007 1,409  
Pretax earnings (loss) 17,218 10,819 34,019 13,188  
Income tax expense 4,358 3,030 8,631 3,839  
Identifiable assets $ 487,848 $ 430,462 $ 487,848 $ 430,462  
v3.21.2
Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Postemployment Benefits [Abstract]        
Service cost for benefits earned during the period $ 351 $ 316 $ 701 $ 633
Other components of net periodic benefit costs:        
Interest cost on accumulated postretirement benefit 227 229 454 459
Other components 53 17 106 34
Total other components of net periodic benefit costs 280 246 560 493
Net periodic postretirement benefit cost $ 631 $ 562 $ 1,261 $ 1,126
v3.21.2
Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Assets    
Reinsurance recoverables and trade receivables, net $ 227,935 $ 224,426
Mortgage loans, net 471,566 391,230
Other investments 100,376 98,529
Total 799,877 714,185
Liabilities    
Notes, loans and leases payable, gross 5,127,100 4,449,691
Total 5,127,100 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 5,364,279 4,698,615
Total 5,364,279 4,698,615
Level 3 [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 227,935 224,426
Mortgage loans, net 471,566 391,230
Other investments 100,376 98,529
Total 799,877 714,185
Liabilities    
Notes, loans and leases payable, gross 0 0
Total 0 0
Carrying Value [Member]    
Assets    
Reinsurance recoverables and trade receivables, net 227,935 224,426
Mortgage loans, net 471,566 391,230
Other investments 100,376 98,529
Total 799,877 714,185
Liabilities    
Notes, loans and leases payable, gross 5,364,279 4,698,615
Total $ 5,364,279 $ 4,698,615
v3.21.2
Fair Value Measurements (Financial instruments level within the fair value hierarchy) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Assets:    
Short-term investments $ 2,215,846 $ 839,250
Fixed maturities - available for sale 2,790,243 2,653,539
Preferred stock 30,176 21,677
Common stock 24,728 20,440
Derivatives 5,754 6,601
Total 5,066,747 3,541,507
Liabilities:    
Derivatives 3,292 5,141
Total 3,292 5,141
Level 1 [Member]    
Assets:    
Short-term investments 2,215,846 839,250
Fixed maturities - available for sale 6,721 6,967
Preferred stock 30,176 21,677
Common stock 24,728 20,440
Derivatives 5,754 6,601
Total 2,283,225 894,935
Liabilities:    
Derivatives 0 0
Total 0 0
Level 2 [Member]    
Assets:    
Short-term investments 0 0
Fixed maturities - available for sale 2,783,407 2,646,415
Preferred stock 0 0
Common stock 0 0
Derivatives 0 0
Total 2,783,407 2,646,415
Liabilities:    
Derivatives 3,292 5,141
Total 3,292 5,141
Level 3 [Member]    
Assets:    
Short-term investments 0 0
Fixed maturities - available for sale 115 157
Preferred stock 0 0
Common stock 0 0
Derivatives 0 0
Total 115 157
Liabilities:    
Derivatives 0 0
Total $ 0 $ 0
v3.21.2
Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue From Contract With Customer [Abstract]        
Revenues Recognized Over Time $ 108,038 $ 69,346 $ 187,853 $ 114,284
Revenues recognized at a point in time 110,924 114,854 231,642 219,702
Total revenues recognized under ASC 606 218,962 184,200 419,495 333,986
Revenues recognized under ASC 840 1,355,934 1,060,950 2,546,944 1,835,644
Revenues recognized under ASC 944 52,578 46,425 98,892 92,200
Revenues recognized under ASC 320 36,780 33,333 71,779 50,315
Total revenues $ 1,664,254 $ 1,324,908 $ 3,137,110 $ 2,312,145
v3.21.2
Revenue Recognition (Revenue over time) (Details)
$ in Thousands
Mar. 31, 2021
USD ($)
Contract With Customer Liability [Abstract]  
2020 $ 22,399
2021 12,287
2022 8,560
2023 6,161
2024 4,581
Thereafter 48,866
Self Moving Equipment [Member]  
Contract With Customer Liability [Abstract]  
2020 6,186
2021 0
2022 0
2023 0
2024 0
Thereafter 0
Property Lease Revenue [Member]  
Contract With Customer Liability [Abstract]  
2020 16,213
2021 12,287
2022 8,560
2023 6,161
2024 4,581
Thereafter $ 48,866
v3.21.2
Allowance for Credit Losses (Narratives) (Details)
$ in Millions
 6 Months Ended
Sep. 30, 2021
USD ($)
Receivables [Abstract]  
Trade receivable components 2
Historical loss rate 2.00%
Allowance for expected credit losses $ 3.4
Available for sale securites, accrued interest receivable $ 29.5
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]  
Reinsurance paid percentage of total assets 1.00%
Premiums Receivable Gross $ 2.7
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.
v3.21.2
Allowance for Credit Losses (Reserve Allowance for Various Credit Loss) (Details)
$ in Thousands
 6 Months Ended
Sep. 30, 2021
USD ($)
Valuation And Qualifying Accounts [Abstract]  
March 31, 2021 $ 4,656
Transition adjustment current expected credit losses (602)
Write-offs against allowance 0
Recoveries 0
September 30, 2021 4,054
Trade Receivables  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2021 2,835
Transition adjustment current expected credit losses 531
Write-offs against allowance 0
Recoveries 0
September 30, 2021 3,366
Investments, Fixed Maturities  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2021 1,320
Transition adjustment current expected credit losses (1,141)
Write-offs against allowance 0
Recoveries 0
September 30, 2021 179
Investments, Other  
Valuation And Qualifying Accounts [Abstract]  
March 31, 2021 501
Transition adjustment current expected credit losses 8
Write-offs against allowance 0
Recoveries 0
September 30, 2021 $ 509
v3.21.2
Accounting Pronouncements (Narratives) (Details)
$ in Thousands
 6 Months Ended
Sep. 30, 2020
USD ($)
Allowance For Credit Loss [Abstract]  
Allowance For Doubtful Accounts Provision For Credit Losses $ 2,880