U-Haul Holding (UHAL) 10-K 26 May 21 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2021	May 21, 2021	Sep. 30, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	AMERCO
Entity Central Index Key	0000004457
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 3,206,757,547
Document Fiscal Year Focus	2021
Document Type	10-K
Document Fiscal Period Focus	FY
Document Period End Date	Mar. 31, 2021
Amendment Flag	false
Entity Common Stock, Shares Outstanding		19,607,788
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	001-11255
Entity Tax Identification Number	88-0106815
Entity Address Address Line 1	5555 Kietzke Lane
Entity Address Address Line 2	Ste. 100
Entity Address City Or Town	Reno
Entity Address State Or Province	NV
Entity Address Postal Zip Code	89511
City Area Code	775
Local Phone Number	688-6300
Security 12b Title	Common stock, $0.25 par value
Trading Symbol	UHAL
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	NV
Document Annual Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
ASSETS:
Cash and cash equivalents	$ 1,194,012	$ 494,352
Reinsurance recoverables and trade receivables, net	224,426	186,672
Inventories, net	105,577	101,083
Prepaid expenses	469,144	562,904
Investments, fixed maturities and marketable equities	2,695,656	2,492,738
Investments, other	489,759	360,373
Deferred policy acquisition costs, net	89,749	103,118
Other assets	47,730	71,956
Right of use assets, financing, net	877,038	1,080,353
Right of use assets, operating	92,505	106,631
Related party assets	35,395	34,784
Subtotal assets	6,320,991	5,594,964
Property, plant and equipment, at cost:
Land	1,075,813	1,032,945
Buildings and improvements	5,163,705	4,663,461
Furniture and equipment	786,505	752,363
Property, plant and equipment (gross)	11,413,668	10,556,222
Less: Accumulated depreciation	(3,083,053)	(2,713,162)
Total property, plant and equipment	8,330,615	7,843,060
Total assets	14,651,606	13,438,024
Liabilities:
Accounts payable and accrued expenses	645,575	554,353
Notes, loans and leases payable	4,668,907	4,621,291
Operating lease liabilities	92,510	106,443
Policy benefits and losses, claims and loss expenses payable	997,701	997,647
Liabilities from investment contracts	2,161,530	1,802,217
Other policyholders' funds and liabilities	12,420	10,190
Deferred income	42,592	31,620
Deferred income taxes, net	1,178,489	1,093,543
Total liabilities	9,799,724	9,217,304
Commitments and contingencies (notes 9, 16, 17 and 18)
Stockholders' equity:
Additional paid-in capital	453,819	453,819
Accumulated other comprehensive loss	106,857	34,652
Retained earnings	4,958,359	4,399,402
Unearned employee stock ownership plan shares	0	0
Total stockholders' equity	4,851,882	4,220,720
Total liabilities and stockholders' equity	14,651,606	13,438,024
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	0
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	0
Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0	0
Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497	10,497
Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)	(525,653)
Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)	(151,997)
Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	477,921	511,520
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 3,909,724	$ 3,595,933

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets Parenthetical	Mar. 31, 2021$ / sharesshares
Series Preferred Stock With or Without Par Value Authorized [Member]
Preferred stock:
Preferred stock, shares authorized	50,000,000
Series A Preferred Stock [Member]
Preferred stock:
Preferred stock, shares authorized	6,100,000
Preferred stock, shares issued	6,100,000
Series B Preferred Stock [Member]
Preferred stock:
Preferred stock, shares authorized	100,000
Series Common Stock With or Without Par Value Authorized [Member]
Preferred stock:
Preferred stock, shares authorized	250,000,000
Serial Common Stock [Member]
Common stock:
Common stock, shares authorized	10,000,000
Common stock, par or stated value per share | $ / shares	$ 0.25
Common Stock [Member]
Common stock:
Common stock, shares authorized	250,000,000
Common stock, par or stated value per share | $ / shares	$ 0.25
Amerco Common Stock [Member]
Common stock:
Common stock, shares authorized	250,000,000
Common stock, shares, issued	41,985,700
Common stock, shares, outstanding	19,607,788
Common stock, par or stated value per share | $ / shares	$ 0.25
Common Stock in Treasury [Member]
Treasury stock:
Treasury stock, shares	22,377,912
Preferred Stock in Treasury [Member]
Treasury stock:
Treasury stock, shares	6,100,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Self-moving equipment rentals	$ 3,083,317	$ 2,692,413	$ 2,653,497
Self-storage revenues	477,262	418,741	367,276
Self-moving and self-storage products and service sales	344,929	265,091	264,146
Property management fees	31,603	30,406	29,148
Life insurance premiums	121,609	127,976	63,488
Property and casualty insurance premiums	68,779	66,053	60,853
Net investment and interest income	122,938	137,829	110,934
Other revenue	291,548	240,359	219,365
Total revenues	4,541,985	3,978,868	3,768,707
Costs and expenses:
Operating expenses	2,187,684	2,117,148	1,981,180
Commission expenses	329,609	288,332	288,408
Cost of sales	214,059	164,018	162,142
Benefits and losses	179,512	174,836	100,277
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Lease expense	28,470	26,882	33,158
Depreciation, net of (gains) losses on disposals	609,930	637,063	554,043
Net gains on disposal of real estate	3,281	(758)	(44)
Total costs and expenses	3,580,838	3,438,740	3,147,720
Earnings from operations	961,147	540,128	620,987
Other components of net periodic benefit costs	(987)	(1,054)	(1,013)
Interest expense	(163,502)	(160,950)	(142,445)
Pretax earnings	796,658	378,124	477,529
Income tax expense	(185,802)	63,924	(106,672)
Earnings available to common shareholders	$ 610,856	$ 442,048	$ 370,857
Basic and diluted earnings per common share	$ 31.15	$ 22.55	$ 18.93
Weighted average common shares outstanding: basic and diluted	19,607,788	19,603,708	19,592,048

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations Parenthetical - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Depreciation:
Net gains on disposal of personal property	$ (54,071)	$ (27,057)	$ (26,982)
Related party:
Related party revenues, net of eliminations	31,603	30,406	29,148
Related party, costs and expenses, net of eliminations	$ 71,824	$ 64,697	$ 64,112

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Comprehensive income (loss) (pretax):
Net earnings	$ 796,658	$ 378,124	$ 477,529
Comprehensive income (loss) (tax effect):
Net earnings	(185,802)	63,924	(106,672)
Comprehensive income (loss) (net of tax):
Net earnings	610,856	442,048	370,857
Other comprehensive income (loss):
Foreign currency translation (pretax)	(5,694)	9,377	(1,759)
Foreign currency translation (tax effect)	0	0	0
Foreign currency translation (net of tax)	(5,694)	9,377	(1,759)
Unrealized gain (loss) on investments (pretax)	96,170	124,566	(76,124)
Unrealized gain (loss) on investments (tax effect)	(19,201)	(26,623)	16,356
Unrealized gain (loss) on investments (net of tax)	76,969	97,943	(59,768)
Change in fair value of cash flow hedges (pretax)	(569)	(8,352)	598
Change in fair value of cash flow hedges (tax effect)	140	2,051	(147)
Change in fair value of cash flow hedges (net of tax)	(429)	(6,301)	451
Amounts reclassified into earnings on hedging activities, (pre tax)	3,640	(3)	35
Amounts reclassified into earnings on hedging activities (tax effect)	(894)	1	(9)
Amounts reclassified into earnings on hedging,( net of tax)	2,746	(2)	26
Postretirement benefit obligation gain (loss) (pretax)	(1,838)	441	(1,359)
Postretirement benefit obligation gain (loss) (tax effect)	451	(108)	334
Postretirement benefit obligation gain (loss) (net of tax)	(1,387)	333	(1,025)
Total other comprehensive income (loss) (pretax)	91,709	126,029	(78,609)
Total other comprehensive income (loss) (tax effect)	(19,504)	(24,679)	16,534
Total other comprehensive income loss, net	72,205	101,350	(62,075)
Total comprehensive income	888,367	504,153	398,920
Total comprehensive income, tax	(205,306)	39,245	(90,138)
Total comprehensive income, net	$ 683,061	$ 543,398	$ 308,782

Consolidated Statements of Chan

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 at Mar. 31, 2018	$ 3,408,708	$ 10,497	$ 452,746	$ (4,623)	$ 3,635,561	$ (525,653)	$ (151,997)	$ (7,823)
Consolidated statement of change in equity
Unrealized net loss on investments, less adoption of ASU 2016-01	0	0	0	(9,724)	9,724	0	0	0
Increase in market value of released ESOP shares	580	0	580	0	0	0	0	0
Release of unearned ESOP Shares	9,392	0	0	0	0	0	0	9,392
Purchase of ESOP shares	(5,617)	0	0	0	0	0	0	(5,617)
Foreign currency translation	(1,759)	0	0	(1,759)	0	0	0	0
Unrealized net gain (loss) on investments, net of tax	(50,044)	0	0	(50,044)	0	0	0	0
Change in fair value of cash flow hedges, net of tax	451	0	0	451	0	0	0	0
Amounts reclassified into earnings on hedging activities	26	0	0	26	0	0	0	0
Adjustment to postretirement benefit obligation	(1,025)	0	0	(1,025)	0	0	0	0
Net earnings	370,857	0	0	0	370,857	0	0	0
Common stock dividends	(39,180)	0	0	0	(39,180)	0	0	0
Net activity	283,681	0	580	(62,075)	341,401	0	0	3,775
Balance at Mar. 31, 2019	3,692,389	10,497	453,326	(66,698)	3,976,962	(525,653)	(151,997)	(4,048)
Consolidated statement of change in equity
Increase in market value of released ESOP shares	493	0	493	0	0	0	0	0
Release of unearned ESOP Shares	4,253	0	0	0	0	0	0	4,253
Purchase of ESOP shares	(205)	0	0	0	0	0	0	(205)
Foreign currency translation	9,377	0	0	9,377	0	0	0	0
Unrealized net gain (loss) on investments, net of tax	97,943	0	0	97,943	0	0	0	0
Change in fair value of cash flow hedges, net of tax	(6,301)	0	0	(6,301)	0	0	0	0
Amounts reclassified into earnings on hedging activities	(2)	0	0	(2)	0	0	0	0
Adjustment to postretirement benefit obligation	333	0	0	333	0	0	0	0
Net earnings	442,048	0	0	0	442,048	0	0	0
Common stock dividends	(19,608)	0	0	0	(19,608)	0	0	0
Net activity	528,331	0	493	101,350	422,440	0	0	4,048
Balance at Mar. 31, 2020	4,220,720	10,497	453,819	34,652	4,399,402	(525,653)	(151,997)	0
Consolidated statement of change in equity
Adjustment for adoption of ASU 2016-13	(2,880)	0	0	0	(2,880)	0	0	0
Purchase of ESOP shares	0	0	0	0	0	0	0	0
Foreign currency translation	(5,694)	0	0	(5,694)	0	0	0	0
Unrealized net gain (loss) on investments, net of tax	76,969	0	0	76,969	0	0	0	0
Change in fair value of cash flow hedges, net of tax	(429)	0	0	(429)	0	0	0	0
Amounts reclassified into earnings on hedging activities	2,746	0	0	2,746	0	0	0	0
Adjustment to postretirement benefit obligation	(1,387)	0	0	(1,387)	0	0	0	0
Net earnings	610,856	0	0	0	610,856	0	0	0
Common stock dividends	(49,019)	0	0	0	(49,019)	0	0	0
Net activity	631,162	0	0	72,205	558,957	0	0	0
Balance at Mar. 31, 2021	$ 4,851,882	$ 10,497	$ 453,819	$ 106,857	$ 4,958,359	$ (525,653)	$ (151,997)	$ 0

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity Parenthetical - $ / shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Common Stock, Dividends, Per Share, Declared	$ 2.50	$ 1	$ 2

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flow from operating activities:
Net earnings	$ 610,856	$ 442,048	$ 370,857
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,001	664,120	581,025
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Amortization of premiums and accretion of discounts related to investments, net	14,229	13,317	13,107
Amortization of debt issuance costs	5,948	4,426	3,923
Interest credited to policyholders	55,321	51,857	35,387
Change in allowance for losses on trade receivables	1,206	(14)	52
Change in allowance for inventory reserves	1,298	640	(146)
Net gains on disposal of personal property	(54,071)	(27,057)	(26,982)
Net gains on disposal of real estate	3,281	(758)	(44)
Net gains on sales of investments	(10,058)	(13,596)	(2,663)
Net losses on equity investments	(394)	(3,783)	5,739
Deferred income taxes	68,411	317,893	106,811
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(39,516)	38,129	(31,365)
Inventories and parts	(5,775)	1,776	(13,492)
Prepaid expenses	94,359	(391,120)	(8,620)
Capitalization of deferred policy acquisition costs	(36,162)	(24,447)	(25,957)
Other assets	29,865	(1,295)	157,152
Related party assets	(487)	(5,645)	4,194
Accounts payable and accrued expenses	92,925	(4,530)	10,263
Policy benefits and losses, claims and loss expenses payable	(1,992)	(12,618)	(236,120)
Other policyholders' funds and liabilities	2,230	(4,857)	5,007
Deferred income	11,567	(1,818)	966
Related party liabilities	60	1,626	(2,067)
Net cash provided by operating activities	1,535,395	1,075,513	975,583
Cash flow from investing activities:
Escrow deposits	(5,221)	6,617	4,299
Purchase of:
Property, plant and equipment	(1,441,475)	(2,309,406)	(1,869,968)
Short term investments	(69,929)	(61,226)	(54,048)
Fixed maturities investments	(606,233)	(379,349)	(540,045)
Equity securities	(962)	(83)	(957)
Preferred stock	(16,144)	0	0
Real estate	(622)	(4,286)	(635)
Mortgage loans	(158,071)	(62,016)	(63,611)
Proceeds from sale and paydowns of:
Property, plant and equipment	537,484	687,375	606,271
Short term investments	69,718	59,056	66,037
Fixed maturities investments	529,239	268,636	123,551
Equity securities	207	185	8,608
Preferred stock	2,700	2,375	1,625
Real estate	255	311	0
Mortgage loans	29,525	25,162	147,737
Net cash used by investing activities	(1,129,529)	(1,766,649)	(1,571,136)
Cash flow from financing activities:
Borrowings from credit facilities	922,008	1,121,412	897,311
Principal repayments on credit facilities	(662,588)	(349,986)	(299,748)
Debt issuance costs	(5,793)	(5,332)	(7,243)
Capital lease payments	(221,247)	(307,782)	(303,431)
Employee stock ownership plan shares	0	(206)	(418)
Common stock dividends paid	(49,019)	(29,404)	(39,179)
Investment contract deposits	517,856	234,640	400,123
Investment contract withdrawals	(213,864)	(151,022)	(132,833)
Net cash provided by financing activities	287,353	512,320	514,582
Effects of exchange rate on cash	6,441	(533)	(4,716)
Increase (decrease) in cash and cash equivalents	699,660	(179,349)	(85,687)
Cash and cash equivalents at the beginning of period	494,352	673,701	759,388
Cash and cash equivalents at the end of the period	$ 1,194,012	$ 494,352	$ 673,701

Basis of Presentation

Basis of Presentation	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Basis of Presentation	Note 1. Basis of Presentation AMERCO, a Nevada Corporation (“AMERCO”), has a fiscal year that ends on the 31 st of March for each year that is referenced. Our insurance company subsidiaries have fiscal years that end on the 31 st of December for each year that is referenced. They have been consolidated on that basis. Our insurance companies' financial reporting processes conform to calendar year reporting as required by state insurance departments. Management believes that consolidating their calendar year into our fiscal year financial statements does not materially affect the financial position or results of operations. We disclose material events, if any, occurring during the intervening period. Consequently, all references to our insurance subsidiaries' years 2020, 2019 and 2018 correspond to fiscal 2021, 2020 and 2019 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. Please see Note 3, Accounting Policies - Adoption of New Accounting Pronouncements , of the Notes to Consolidated Financial Statements.

Principles of Consolidation

Principles of Consolidation	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Principles of Consolidation	Note 2. Principles of Consolidation We apply Accounting Standards Codification (“ASC”) 810 - Consolidation (“ASC 810”) in our principles of consolidation. ASC 810 addresses arrangements where a company does not hold a majority of the voting or similar interests of a variable interest entity (“VIE”). A company is required to consolidate a VIE if it has determined it is the primary beneficiary, which is the entity with the power to direct activities that most significantly affect the economic performance of the VIE and has the obligation absorbs the majority of the losses or benefits. ASC 810 also addresses the policy when a company owns a majority of the voting or similar rights and exercises effective control. A VIE is not self-supportive due to having one or both of the following conditions: (i) it has an insufficient amount of equity for it to finance its activities without receiving additional subordinated financial support or (ii) its owners do not hold the typical risks and rights of equity owners. This determination is made upon the creation of a variable interest and is re-assessed on an on-going basis should certain changes in the operations of a VIE, or its relationship with the primary beneficiary trigger a reconsideration. After a reconsideration event occurs the most recent facts and circumstances are utilized in determining whether or not a company is a VIE, which other company(ies) have a variable interest in the entity, and whether or not the company's interest is such that it is the primary beneficiary. We will continue to monitor our relationships with the other entities regarding who is the primary beneficiary, which could change based on facts and circumstances of any reconsideration events. Please see Note 20, Related Party Transactions, of the Notes to Consolidated Financial Statements. The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, which are consolidated under the voting interest model. Intercompany accounts and transactions have been eliminated. Description of Legal Entities 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.   F- 10   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Description of Operating Segments AMERCO has three ( 3 ) reportable segments. They are Moving and Storage, Property and Casualty Insurance and Life Insurance. 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. Property and Casualty Insurance includes Repwest and its wholly-owned subsidiaries and ARCOA Risk Retention Group (“ARCOA”). Property and Casualty Insurance provides loss adjusting and claims handling for U-Haul through regional offices in the United States and Canada. Property and Casualty Insurance also underwrites components of the Safemove ® , Safetow ® , Safemove Plus ® , Safestor ® and Safestor Mobile ® protection packages to U-Haul customers. The business plan for Property and Casualty Insurance includes offering property and casualty products in other U-Haul related programs. ARCOA is a group captive insurer owned by us and our wholly owned subsidiaries whose purpose is to provide insurance products related to our moving and storage business. Life Insurance includes Oxford and its wholly owned subsidiaries. Life Insurance provides life and health insurance products primarily to the senior market through the direct writing and reinsuring of life insurance, Medicare supplement and annuity policies.

Accounting Policies

Accounting Policies	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Accounting Policies	Note 3.   Accounting Policies Use of Estimates The preparation of financial statements in conformity with the generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. The accounting policies that we deem most critical to us and that require management's most difficult and subjective judgments include the principles of consolidation, the recoverability of property, plant and equipment, the adequacy of insurance reserves, the recognition and measurement of impairments for investments accounted for under ASC 320 - Investments - Debt and Equity Securities and the recognition and measurement of income tax assets and liabilities. The actual results experienced by us may materially differ from management's estimates. Cash and Cash Equivalents We consider cash equivalents to be highly liquid debt securities with insignificant interest rate risk with original maturities from the date of purchase of three months or less. Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash deposits. Accounts at each United States financial institution are insured by the Federal Deposit Insurance Corporation up to $ 250,000 . Accounts at each Canadian financial institution are insured by the Canada Deposit Insurance Corporation up to $ 100,000 CAD per account. As of March 31, 2021 and March 31, 2020, we held cash equivalents in excess of these insured limits. To mitigate this risk, we select financial institutions based on their credit ratings and financial strength. F- 11   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Investments Fixed Maturities and Marketable Equities. Fixed maturity investments consist of either marketable debt, equity or redeemable preferred stocks. As of the balance sheet dates, all of our investments in these securities were classified as available-for-sale. Available-for-sale investments are reported at fair value, with unrealized gains or losses recorded net of taxes and applicable adjustments to deferred policy acquisition costs in stockholders' equity.   We adopted ASC Topic 326, Financial Instruments Credit Losses: (“Topic 326”) as of April 1, 2020, for available-for-sale debt securities. This new standard requires the use of forward-looking information to estimate credit losses and requires credit losses for available for sale debt securities to be recorded through an allowance for credit losses rather than a reduction in the amortized cost basis .   Changes in the market value of common stocks are recognized in earnings. Fair value for these investments is based on quoted market prices, dealer quotes or discounted cash flows. The cost of investments sold is based on the specific identification method. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Mortgage Loans and Notes on Real Estate. Mortgage loans and notes on real estate are reported at their unpaid balance, net of any allowance for expected losses and any unamortized premium or discount. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Recognition of Investment Income. Interest income from bonds and mortgage notes is recognized when earned. Dividends on common and preferred stocks are recognized on the ex-dividend dates. Realized gains and losses on the sale or exchange of investments are recognized at the trade date. Derivative Financial Instruments Our objective for holding derivative financial instruments is to manage interest rate risk exposure primarily through entering interest rate swap agreements and call options. We do not enter into these instruments for trading purposes. Counterparties to the interest rate swap agreements are major financial institutions. Derivatives are recognized at fair value on the balance sheet and are classified as prepaid expenses (asset) or accrued expenses (liability). Derivatives that are not designated as cash flow hedges for accounting purposes must be adjusted to fair value through income. If the derivative qualifies and is designated as a cash flow hedge, changes in its fair value will be recorded in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. See Note 11, Derivatives, of the Notes to Consolidated Financial Statements. Inventories and parts, net Inventories and parts, net were as follows:     March 31,     2021   2020     (In thousands) Truck and trailer parts and accessories (a) $ 95,976 $ 88,138 Hitches and towing components (b)   19,972   23,070 Moving supplies and propane (b)   12,877   11,824 Subtotal   128,825   123,032 Less: LIFO reserves   (21,832)   (18,886) Less: excess and obsolete reserves   (1,416)   (3,063) Total $ 105,577 $ 101,083           (a) Primarily held for internal usage, including equipment manufacturing and repair (b) Primarily held for retail sales           Inventories consist primarily of truck and trailer parts and accessories used to manufacture and repair rental equipment as well as products and accessories available for retail sale. Inventory is held at our owned locations; our independent dealers do not hold any of our inventory. Inventories are stated at the lower cost or net realizable value. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Inventory cost is primarily determined using the last-in first-out method (“LIFO”). Inventories valued using LIFO consisted of approximately 96 % of the total inventories for March 31, 2021 and 2020. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $21.8 million and $18.9 million higher as of March 31, 2021 and 2020, respectively. In fiscal 2021, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.4 million. Property, Plant and Equipment Our Property, plant and equipment is stated at cost. Interest expense, if any, incurred during the initial construction of buildings is considered part of cost. Depreciation is computed for financial reporting purposes using the straight line or an accelerated method based on a declining balance formula over the following estimated useful lives: rental equipment 2-20 years and buildings and non-rental equipment 3-55 years. Routine maintenance costs are charged to operating expense as they are incurred. Gains and losses on dispositions of property, plant and equipment, other than real estate (“personal property”), are netted against depreciation expense when realized. The net amount of gains, netted against depreciation expense, were $ 54.1 million, $ 27.1 million and $ 27.0 million during fiscal 2021, 2020 and 2019, respectively. Equipment depreciation is recognized in amounts expected to result in the recovery of estimated residual values upon disposal, i.e., minimize gains or losses. In determining the depreciation rate, historical disposal experience, holding periods and trends in the market for vehicles are reviewed. As a result of changes in IRS regulations regarding the capitalization of assets, beginning in the first quarter of fiscal 2017, we raised the value threshold before certain assets are capitalized within our depreciation policy. This change in threshold, results in the immediate recognition of reported operating costs with a lagging decrease in depreciation expense over the term that these assets would have been depreciated. Due to this change, we had operating expenses of $ 21.2 million and $ 27.7 million in fiscal 2021 and 2020, respectively. This change in threshold benefited us through the immediate recognition of tax deductible costs. We regularly perform reviews to determine whether facts and circumstances exist which indicate that the carrying amount of assets, including estimates of residual value, may not be recoverable or that the useful life of assets are shorter or longer than originally estimated. Reductions in residual values (i.e., the price at which we ultimately expect to dispose of revenue earning equipment) or useful lives will result in an increase in depreciation expense over the remaining life of the equipment. Reviews are performed based on vehicle class, generally subcategories of trucks and trailers. We assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their estimated remaining lives against their respective carrying amounts. We consider factors such as current and expected future market price trends on used vehicles and the expected life of vehicles included in the fleet. Impairment, if any, is based on the excess of the carrying amount over the fair value of those assets. If asset residual values are determined to be recoverable, but the useful lives are shorter or longer than originally estimated, the net book value of the assets is depreciated over the newly determined remaining useful lives. For our box truck fleet we utilize an accelerated method of depreciation based upon a declining formula. Under the declining balances method (2.4 times declining balance), the book value of a rental truck is reduced approximately 16 %, 13 %, 11 %, 9 %, 8 %, 7 %, and 6 % during years one through seven, respectively and then reduced on a straight line basis to a salvage value of 15 % by the end of year fifteen. Comparatively, a standard straight line approach would reduce the book value by approximately 5.7 % per year over the life of the truck. Although we intend to sell our used vehicles for prices approximating book value, the extent to which we realize a gain or loss on the sale of used vehicles is dependent upon various factors including, but not limited to, the general state of the used vehicle market, the age and condition of the vehicle at the time of its disposal and the depreciation rates with respect to the vehicle . We typically sell our used vehicles at our sales centers throughout the United States and Canada, on our website at uhaul.com/trucksales or by phone at 1-866-404-0355. Additionally, we sell a large portion of our pickup and cargo van fleet at automobile dealer auctions. In addition to our property, plant and equipment, we had real estate held for future development or use of $ 68.8 million and $ 69.6 million for fiscal 2021 and 2020, respectively and is included in Investments, other. F- 13   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Receivables Trade receivables include trade accounts from moving and self-storage customers and dealers, insurance premiums and amounts due from re-insurers, less management's estimate of expected losses. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Insurance premiums receivable for policies that are billed through contracted agents are recorded net of commissions payable. A commission payable is recorded as a separate liability for those premiums that are billed direct. Reinsurance recoverables include case reserves and actuarial estimates of claims incurred but not reported ("IBNR"). These receivables are not expected to be collected until after the associated claim has been adjudicated and billed to the re-insurer. The reinsurance recoverables may have little or no allowance for doubtful accounts due to the fact that reinsurance is typically procured from carriers with strong credit ratings. Furthermore, we do not cede losses to a re-insurer if the carrier is deemed financially unable to perform on the contract. Reinsurance recoverables also include insurance ceded to other insurance companies. Notes and mortgage receivables include accrued interest and are reduced by discounts and amounts considered by management to be uncollectible. Policy Benefits and Losses, Claims and Loss Expenses Payable Liabilities for future policy benefits related to life insurance, Medical supplement insurance, and deferred annuities are determined by management utilizing the net premium valuation methodology and are accrued when premium revenue is recognized. The liability, which represents the present value of future benefits to be paid to policyholders and related expenses less the present value of future net premiums, is estimated using assumptions applicable at the time the insurance contracts are written, with provisions for the risk of adverse deviation, as appropriate. Assumptions include expected mortality and morbidity experience, policy lapses and surrenders, current asset yields and expenses, and expected interest rate yields. The Company periodically performs a gross premium valuation and reviews original assumptions, including capitalized expenses which reduce the gross premium valuation, to evaluate whether the assets and liabilities are adequate and whether a loss reserve should be recognized. Liabilities for health, disability and other policies include estimates of payments to be made on insurance claims for reported losses and estimates of IBNR losses. Oxford's liabilities for deferred annuity contracts consist of contract account balances that accrue to the benefit of the policyholders. Property and Casualty Insurance's liability for reported and unreported losses is based on Repwest's historical data along with industry averages. The liability for unpaid loss adjustment expenses is based on historical ratios of loss adjustment expenses paid to losses paid. Amounts recoverable from re-insurers on unpaid losses are estimated in a manner consistent with the claim liability associated with the re-insured policy. Adjustments to the liability for unpaid losses and loss expenses as well as amounts recoverable from re-insurers on unpaid losses are charged or credited to expense in the periods in which they are made. Due to the nature of the underlying risks and high degree of uncertainty associated with the determination of the liability for future policy benefits and claims, the amounts to be ultimately paid to settle these liabilities cannot be precisely determined and may vary significantly from the estimated liability, especially for long-tailed casualty lines of business such as excess workers' compensation.   As a result of the long-tailed nature of the excess workers' compensation policies written by Repwest during 1983 through 2001, it may take a number of years for claims to be fully reported and finally settled. On a regular basis insurance reserve adequacy is reviewed by management to determine if existing assumptions need to be updated. In determining the assumptions for calculating workers' compensation reserves, management considers multiple factors including the following: Claimant longevity Cost trends associated with claimant treatments Changes in ceding entity and third party administrator reporting practices Changes in environmental factors including legal and regulatory F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Current conditions affecting claim settlements Future economic conditions including inflation We have reserved each claim based upon the accumulation of current claim costs projected through each claimant's life expectancy and then adjusted for applicable reinsurance arrangements.   Management reviews each claim bi-annually or more frequently, if there are changes in facts or circumstances to determine if the estimated life-time claim costs have increased and then adjusts the reserve estimate accordingly at that time.   We have factored in an estimate of what the potential cost increases could be in our IBNR liability.   We have not assumed settlement of the existing claims in calculating the reserve amount, unless it is in the final stages of completion. Continued increases in claim costs, including medical inflation and new treatments and medications could lead to future adverse development resulting in additional reserve strengthening.   Conversely, settlement of existing claims or if injured workers return to work or expire prematurely, could lead to future positive development. Self-Insurance Reserves U-Haul retains the risk for certain public liability and property damage programs related to our rental equipment. The consolidated balance sheets include $ 427.1 million and $ 410.1 million of liabilities related to these programs as of March 31, 2021 and 2020, respectively. These liabilities are recorded in Policy benefits and losses, claims and loss expenses payable. Management takes into account losses incurred based upon actuarial estimates, past experience, current claim trends, as well as social and economic conditions. This liability is subject to change in the future based upon changes in the underlying assumptions including claims experience, frequency of incidents, and severity of incidents. Additionally, as of March 31, 2021 and 2020, the consolidated balance sheets include liabilities of $ 17.5 million and $ 15.7 million, respectively, related to medical plan benefits we provide for eligible employees. We estimate this liability based on actual claims outstanding as of the balance sheet date as well as an actuarial estimate of IBNR claims. These amounts are recorded in Accounts payable and accrued expenses on the consolidated balance sheets. Revenue Recognition Self-moving rentals are recognized for the period that trucks and moving equipment are rented. Self-storage revenues, based upon the number of paid storage contract days, are recognized as earned during the period.   Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. Property and casualty insurance premiums are recognized as revenue over the policy periods. Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Interest and investment income are recognized as earned. Amounts collected from customers for sales tax are recorded on a net basis. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements. Advertising All advertising costs are expensed as incurred. Advertising expense was $ 18.0 million, $ 13.7 million and $ 10.6 million in fiscal 2021, 2020 and 2019, respectively.   Deferred Policy Acquisition Costs Commissions and other costs that fluctuate with and are primarily related to the successful acquisition or renewal of certain insurance premiums are deferred. For our Life Insurance's life and health insurance products, these costs are amortized, with interest, in relation to revenue such that costs are realized as a constant percentage of revenue. For its annuity insurance products the costs are amortized, with interest, in relation to the present value of actual and expected gross profits. F- 15   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Starting in fiscal 2014, new annuity contract holders were provided with a sales inducement in the form of a premium bonus (the “Sales Inducement Asset”).   Sales inducements are recognized as an asset with a corresponding increase to the policyholder liability and are amortized in a similar manner to Deferred Policy Acquisition Costs.   As of December 31, 2020 and 2019, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.0 million and $ 16.8 million, respectively on the consolidated balance sheet and amortization expense totaled $ 4.3 million, $ 5.5 million and $ 3.7 million for the periods ended December 31, 2020, 2019 and 2018, respectively. Environmental Costs Liabilities are recorded when environmental assessments and remedial efforts, if applicable, are probable and the costs can be reasonably estimated. The amount of the liability is based on management's best estimate of undiscounted future costs. Certain recoverable environmental costs related to the removal of underground storage tanks or related contamination are capitalized and amortized over the estimated useful lives of the properties. These costs are capitalized if they improve the safety or efficiency of the property or are incurred in preparing the property for sale. Income Taxes AMERCO files a consolidated tax return with all of its legal subsidiaries. The provision for income taxes reflects deferred income taxes resulting from changes in temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. Deferred tax a

Earnings Per Share

Earnings Per Share	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Note 4.   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. The weighted average common shares outstanding exclude post-1992 shares of the employee stock ownership plan that have not been committed to be released. The unreleased shares, net of shares committed to be released, were 11,949 as of March 31, 2019. As of March 31, 2021 and 2020 all of these shares have been released.

Reinsurance Recoverables and Tr

Reinsurance Recoverables and Trade Receivables, Net	12 Months Ended
	Mar. 31, 2021
Reinsurance Disclosures [Abstract]
Reinsurance Recoverables and Trade Receivables, Net	Note 5.   Reinsurance Recoverables and Trade Receivables, Net Reinsurance recoverables and trade receivables, net were as follows:     March 31,     2021   2020     (In thousands) Reinsurance recoverable $ 66,386 $ 89,020 Trade accounts receivable   121,251   59,394 Paid losses recoverable   276   624 Accrued investment income   27,883   25,744 Premiums and agents' balances   2,546   1,582 Independent dealer receivable   258   1,015 Other receivables   10,247   9,828     228,847   187,207 Less: Allowance for doubtful accounts   (4,421)   (535)   $ 224,426 $ 186,672

Investments

Investments	12 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	Note 6.   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 $ 27.7 million and $ 30.8 million for December 31, 2020 and 2019, respectively. F- 18   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Available-for-Sale Investments Available-for-sale investments as of March 31, 2021 were as follows:       Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Allowance for Expected Credit Losses   Fair Value           (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   Available-for-sale investments as of March 31, 2020 were as follows:       Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Fair Value           (in thousands) U.S. treasury securities and government obligations $ 112,421 $ 7,959 $ (1) $ - $ 120,379 U.S. government agency mortgage-backed securities   88,449   759   (1)   (373)   88,834 Obligations of states and political subdivisions   287,643   20,664   (155)   -   308,152 Corporate securities   1,656,425   100,302   (919)   (812)   1,754,996 Mortgage-backed securities   187,784   6,011   (1)   (107)   193,687 Redeemable preferred stocks   1,493   72   -   -   1,565   $ 2,334,215 $ 135,767 $ (1,077) $ (1,292) $ 2,467,613   We sold available-for-sale securities with a fair value of $ 523.9 million, $ 264.5 million and $ 114.8 million in fiscal 2021, 2020 and 2019, respectively. The gross realized gains on these sales totaled $ 9.6 million, $ 6.4 million and $ 2.0 million in fiscal 2021, 2020 and 2019, respectively. We realized gross losses on these sales of $ 2.1 million, $ 0.2 million and $ 0.2 million in fiscal 2021, 2020 and 2019, respectively.   We adopted Topic 326 as of April 1, 2020. 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. F- 19   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) 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 fiscal year 2021. The adjusted cost and estimated market value of available-for-sale investments by contractual maturity, were as follows:     March 31, 2021   March 31, 2020     Amortized Cost   Fair Value   Amortized Cost   Fair Value     (In thousands) Due in one year or less $ 90,142 $ 91,190 $ 128,747 $ 129,420 Due after one year through five years   562,442   601,818   547,821   566,934 Due after five years through ten years   672,733   754,536   636,036   678,636 Due after ten years   905,567   1,019,570   832,334   897,371     2,230,884

Other Assets

Other Assets	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Other Assets	Note 7.   Other Assets Other assets were as follows:     March 31,     2021   2020     (In thousands) Deposits (debt-related) $ 33,952 $ 33,020 Cash surrender value of life insurance policies   567   31,371 Deposits (real estate related)   13,211   7,565   $ 47,730 $ 71,956

Net Investment and Interest Inc

Net Investment and Interest Income	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Net Investment and Interest Income	Note 8.   Net Investment and Interest Income Net investment and interest income, were as follows:     Years Ended March 31,     2021   2020   2019     (In thousands) Fixed maturities $ 102,021 $ 107,434 $ 99,348 Real estate   5,769   7,304   5,538 Insurance policy loans   829   974   1,305 Mortgage loans   18,248   17,164   16,674 Short-term, amounts held by ceding reinsurers, net and other investments   3,103   9,807   (7,429) Investment income   129,970   142,683   115,436 Less: investment expenses   (7,032)   (4,854)   (4,502) Investment income - related party, net eliminations   -   -   - Net investment and interest income $ 122,938 $ 137,829 $ 110,934

Borrowings

Borrowings	12 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Borrowings	F- 21   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Note 9.   Borrowings Long-Term Debt Long-term debt was as follows:                     March 31,   2021 Rates   Maturities   2021   2020                     (In thousands) Real estate loan (amortizing term)       1.61 %     2023 $ 82,913 $ 92,913 Senior mortgages 2.80 % - 6.62 % 2021 - 2038   2,125,324   2,029,878 Real estate loans (revolving credit) (a) 1.36 % - 1.61 % 2023 - 2025   535,000   519,000 Fleet loans (amortizing term) 1.61 % - 4.66 % 2022 - 2028   176,295   224,089 Fleet loans (revolving credit) 1.27 % - 2.36 % 2023 - 2025   535,000   567,000 Finance leases (rental equipment) 1.92 % - 5.04 % 2021 - 2027   513,623   734,870 Finance liability (rental equipment) 1.60 % - 4.22 % 2024 - 2029   644,375   398,834 Other obligations 2.25 % - 8.00 % 2021 - 2049   86,085   84,484 Notes, loans and finance leases payable                 $ 4,698,615 $ 4,651,068 Less: Debt issuance costs                   (29,708)   (29,777) Total notes, loans and finance leases payable, net                 $ 4,668,907 $ 4,621,291                           (a) Certain loans have interest rate swaps fixing the rate between 3.03% and 3.14% based on current margin       Real Estate Backed Loans Real Estate Loan Real Estate and certain of its subsidiaries and U-Haul Company of Florida are borrowers under a real estate loan (the “Real Estate Loan”).   The Real Estate Loan requires monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. The Real Estate Loan is secured by various properties owned by the borrowers.   The interest rate, per the provisions of the amended loan agreement, is the applicable LIBOR plus the applicable margin. As of March 31, 2021, the applicable LIBOR was 0.11 % and the applicable margin was 1.50 %, the sum of which was 1.61 %. The default provisions of the Real Estate Loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. There are limited restrictions regarding our use of the funds. Senior Mortgages Various subsidiaries of Real Estate and U-Haul are borrowers under certain senior mortgages. The senior mortgages require monthly principal and interest payments. The senior mortgages are secured by certain properties owned by the borrowers. The fixed interest rates, per the provisions of the senior mortgages, range between 2.80 % and 6.62 %. The weighted average interest rate of these loans as of March 31, 2021 was 4.28 %.   Certain senior mortgages have an anticipated repayment date and a maturity date. If these senior mortgages are not repaid by the anticipated repayment date, the interest rate on these mortgages would increase from the current fixed rate. We are using the anticipated repayment date for our maturity schedule. Real Estate and U-Haul have provided limited guarantees of the senior mortgages. The default provisions of the senior mortgages include non-payment of principal or interest and other standard reporting and change-in-control covenants. There are limited restrictions regarding our use of the funds. F- 22   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Real Estate Loans (Revolving Credit) Various subsidiaries of Real Estate are borrowers under asset-backed real estate loans with an aggregate borrowing capacity of $ 385.0 million. As of March 31, 2021, the outstanding balance of these loans in the aggregate was $ 385.0 million. These loans are secured by certain properties owned by the borrowers. The loan agreements provide for term loans, subject to the terms of the loan agreements. The loans require monthly interest payments with the unpaid loan balance and accrued and unpaid interest due at maturity. The interest rate, per the provision of the loan agreements, is the applicable LIBOR plus the applicable margin. As of March 31, 2021, the applicable LIBOR was 0.11 % and the margin was between 1.25 % and 1.50 %, the sum of which was between 1.36 % and 1.61 %. AMERCO is the guarantor of these loans. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. AMERCO is a borrower under a real estate loan. The current maximum credit commitment is $ 200.0 million, which can be increased to $ 300.0 million by bringing in other lenders. As of March 31, 2021, the outstanding balance was $ 150.0 million. This loan agreement provides for revolving loans, subject to the terms of the loan agreement. This loan requires monthly interest payments with the unpaid loan balance and accrued and unpaid interest due at maturity. As of March 31, 2021, the applicable LIBOR was 0.11 % and the margin was 1.38 %, the sum of which was 1.49 %. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. There is a 0.30 % fee charged for unused capacity. Fleet Loans Rental Truck Amortizing Loans The amortizing loans require monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. These loans were used to purchase new trucks. The interest rates, per the provision of the loan agreements, are carried at fixed rates ranging between 1.61 % and 4.66 %. All of our rental truck amortizing loans are collateralized by the rental equipment purchased. The majority of these loans are funded at 70%, but some may be funded at 100%. AMERCO, and in some cases U-Haul, is guarantor of these loans. The default provisions of these loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. Rental Truck Revolvers Various subsidiaries of U-Haul entered into three revolving fleet loans with an aggregate borrowing capacity of $ 590.0 million. The interest rates, per the provision of the loan agreements, are the applicable LIBOR plus the applicable margin. As of March 31, 2021, the applicable LIBOR was between 0.11 % and 0.12 % and the margin was between 1.15 % and 1.25 %, the sum of which was between 1.27 % and 1.36 %. Of the $ 535.0 million outstanding, $ 100.0 million is fixed with an interest rate of 2.36 %. Only interest is paid on the loans until the last nine months of the respective loan terms when principal becomes due monthly. Finance Leases The Finance Lease balance represents our sale-leaseback transactions of rental equipment that were entered into and classified as capital leases prior to the adoption of ASC 842. The historical capital lease balance was reclassified to Right-of-Use (“ROU”) assets-finance, net. The agreements are generally seven (7) year terms with interest rates ranging from 1.92 % to 5.04 %.   All of our finance leases are collateralized by our rental fleet. The net book value of the corresponding rental equipment was $ 865.6 million and $ 1,067.3 million as of March 31, 2021 and 2020, respectively. There were no new financing leases, as assessed under the new leasing guidance, entered into during fiscal 2021. F- 23   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Finance Liabilities Finance liabilities represent our rental equipment financing transactions that have historically been accounted for as capital leases prior to the adoption of ASC 842 which substantially changed the accounting for sale-leasebacks going forward. In accordance with the new leasing guidance, we assess if sale-leaseback transactions qualify as a sale at initiation by determining if a transfer of ownership occurs.   We have determined that our equipment sale-leasebacks do not qualify as a sale, as the buyer-lessors do not obtain control of the assets in our ongoing sale-leaseback arrangements. As a result, we expect future sale-leasebacks to be accounted for as a financial liability and the leased assets will be capitalized at cost.     Our finance liabilities have an average term of seven (7) years and interest rates ranging from 1.60 % to 4.22 %. These finance liabilities are collateralized by our rental fleet.   Other Obligations In May 2020, AMERCO, entered into a $ 200.0 million secured credit facility with PNC Bank, as agent and lead arranger of a syndicate of lenders.   The interest rate, per the provision of the loan agreement, was the applicable LIBOR plus the applicable margin.   This loan was paid off in October 2020. In February 2011, AMERCO and U.S. Bank, NA (the “Trustee”) entered into the U-Haul Investors Club ® Indenture.   AMERCO and the Trustee entered into this indenture to provide for the issuance of notes by us directly to investors over our proprietary website, uhaulinvestorsclub.com (“U-Notes ® ”). The U-Notes ® are secured by various types of collateral including, but not limited to, rental equipment and real estate.   U-Notes ® are issued in smaller series that vary as to principal amount, interest rate and maturity.   U-Notes ® are obligations of the Company and secured by the associated collateral; they are not guaranteed by any of the Company's affiliates or subsidiaries. As of March 31, 2021, the aggregate outstanding principal balance of the U-Notes ® issued was $ 88.6 million, of which $ 2.5 million is held by our insurance subsidiaries and eliminated in consolidation. Interest rates range between 2.25 % and 8.00 % and maturity dates range between 2021 and 2049 . Oxford is a member of the Federal Home Loan Bank (“FHLB”) and, as such, the FHLB has made advances to Oxford. As of December 31, 2020, the advances had an aggregate balance of $ 70.5 million, for which Oxford pays fixed interest rates between 0.00 % and

Interest on Borrowings

Interest on Borrowings	12 Months Ended
	Mar. 31, 2021
Interest Expense, Borrowings [Abstract]
Interest on Borrowings	F- 24   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Note 10.   Interest on Borrowings Interest Expense Components of interest expense include the following:     Years Ended March 31,     2021   2020   2019     (In thousands) Interest expense $ 165,484 $ 180,444 $ 150,609 Capitalized interest   (11,573)   (23,517)   (12,733) Amortization of transaction costs   5,949   4,427   3,745 Interest expense resulting from cash flow hedges   3,642   (404)   824 Total interest expense   163,502   160,950   142,445 Interest paid in cash, including payments related to derivative contracts, amounted to $ 153.2 million, $ 168.1 million and $ 149.8 million for fiscal 2021, 2020 and 2019, respectively. Interest Rates Interest rates and our revolving credit borrowings were as follows:     Revolving Credit Activity       Years Ended March 31,       2021   2020   2019       (In thousands, except interest rates)   Weighted average interest rate during the year   1.40 % 3.31 % 3.39 % Interest rate at year end   1.40 % 2.86 % 3.60 % Maximum amount outstanding during the year $ 1,175,000 $ 1,086,000 $ 959,400   Average amount outstanding during the year $ 1,088,293 $ 1,002,081 $ 699,415   Facility fees $ 261 $ 193 $ 374

Derivatives

Derivatives	12 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Note 11.   Derivatives We manage exposure to changes in market interest rates. Our use of derivative instruments is limited to highly effective interest rate swaps to hedge the risk of changes in cash flows (future interest payments) attributable to changes in LIBOR swap rates, with the designated benchmark interest rate being hedged on certain of our LIBOR indexed variable rate debt and a variable rate operating lease. 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 its counterparties and do not currently anticipate non-performance by the counterparties. Interest rate swap agreements are not entered into for trading purposes. These fair values are determined using pricing valuation models which include broker quotes for which significant inputs are observable. They include adjustments for counterparty credit quality and other deal-specific factors, where appropriate and are classified as Level 2 in the fair value hierarchy. The derivative fair values reflected in prepaid expense and accounts payable and accrued expenses in the consolidated balance sheet were as follows:             March 31, 2021   March 31, 2020     (In thousands) Interest rate contracts designated as hedging instruments         Assets $ - $ - Liabilities   5,141   8,214 Notional amount (debt)   235,000   235,000 F- 25   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued)     The Effect of Interest Rate     Contracts on the Statements of Operations     Years Ended March 31,     2021   2020   2019     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ (3,071) $ 8,355 $ (633) (Gain) loss reclassified from AOCI into income $ (3,640) $ 3 $ (35)   Gains or losses recognized in income on derivatives are recorded as interest expense in the consolidated statements of operations.   During fiscal year 2021, we recognized a decrease in the fair value of our cash flow hedges of $0.4 million, net of taxes.   During fiscal year 2021, we reclassified $ 3.6 million from accumulated other comprehensive income (loss) (“AOCI”) to interest expense.   As of March, 31 2021, we expect to reclassify $ 3.9 million of net gains on interest contracts from AOCI to earnings as interest expense over the next twelve months. We use derivatives to hedge our equity market exposure to indexed annuity products sold by our Life Insurance company. These contracts earn a return for the contractholder based on the change in the value of the S&P 500 index between annual index point dates. We buy and sell listed equity and index call options and call option spreads. The credit risk is with the party in which the options are written. The net option price is paid up front and there are no additional cash requirements or additional contingent liabilities. These contracts are held at fair value on our balance sheet. At December 31, 2020 and 2019, these derivative hedges had a fair value of $ 6.6 million and $ 5.9 million, with notional amounts of $ 282.7   million and $ 246.8   million, respectively. These derivative instruments are included in Investments, other; on the consolidated balance sheets. The fair values of these call options are determined based on quoted market prices from the relevant exchange and are classified as Level 1 in the fair value hierarchy. Although the call options are employed to be effective hedges against our policyholder obligations from an economic standpoint, they do not meet the requirements for hedge accounting under GAAP. Accordingly, the changes in fair value of the call options are recognized each reporting date as a component of net investment and interest income. The change in fair value of the call options include the gains or losses recognized at the expiration of the option term and the changes in fair value for open contracts.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Other Comprehensive Income Noncontrolling Interest [Text Block]	Note 12.   Accumulated Other Comprehensive Income (Loss) A summary of our AOCI components, net of tax, were as follows:       Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652 Foreign currency translation   (5,694)   -   -   -   (5,694) Unrealized net gain on investments   -   76,969   -   -   76,969 Change in fair value of cash flow hedges   -   -   (429)   -   (429) Amounts reclassified into earnings on hedging activities   -   -   2,746   -   2,746 Change in post retirement benefit obligaitons   -   -   -   (1,387)   (1,387) Other comprehensive income (loss)   (5,694)   76,969   2,317   (1,387)   72,205 Balance as of March 31, 2021 $ (52,929) $ 167,653 $ (3,879) $ (3,988) $ 106,857

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Mar. 31, 2021
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity	F- 26   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Note 13. Stockholders' Equity The following table lists the dividends that have been declared and issued for fiscal years 2021 and 2020. Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               December 9, 2020 $ 2.00   December 21, 2020   December 30, 2020 August 20, 2020   0.50   September 7, 2020   September 21, 2020 December 4, 2019   0.50   December 19, 2019   January 6, 2020 August 22, 2019   0.50   September 9, 2019   September 23, 2019   As of March 31, 2021, no awards had been issued under the 2016 AMERCO Stock Option Plan.

Provision for Taxes

Provision for Taxes	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Provision for Taxes	Note 14.   Provision for Taxes Earnings before taxes and the provision for taxes consisted of the following:     Years Ended March 31,     2021   2020   2019     (In thousands) Pretax earnings:             U.S. $ 773,030 $ 372,687 $ 466,175 Non-U.S.   23,628   5,437   11,354 Total pretax earnings $ 796,658 $ 378,124 $ 477,529               Current provision (benefit)             Federal $ 100,521 $ (373,817) $ (6,114) State   16,572   (9,600)   3,420 Non-U.S.   3,404   949   1,375     120,497   (382,468)   (1,319) Deferred provision (benefit)             Federal   53,957   307,846   94,961 State   9,795   9,728   11,311 Non-U.S.   1,553   970   1,719     65,305   318,544   107,991               Provision for income tax expense (benefit) $ 185,802 $ (63,924) $ 106,672               Income taxes paid (net of income tax refunds received) $ 29,044 $ 6,859 $ 4,255 F- 27   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) The difference between the tax provision at the statutory federal income tax rate and the tax provision attributable to income before taxes was as follows:     Years Ended March 31,       2021   2020   2019       (In percentages)   Statutory federal income tax rate   21.00 % 21.00 % 21.00 % Increase (reduction) in rate resulting from:               NOL tax rate benefit   - % (38.62) % - % State taxes, net of federal benefit   2.53 % 0.02 % 2.41 % Foreign rate differential   - % 0.21 % 0.15 % Federal tax credits   (0.99) % (0.53) % (0.15) % Transition tax   - % - % (0.20) % Tax-exempt income   (0.08) % (0.17) % - % Dividend received deduction   (0.01) % (0.01) % (0.01) % Other   0.87 % 1.19 % (0.86) % Actual tax expense (benefit) of operations   23.32 % (16.91) % 22.34 %   Significant components of our deferred tax assets and liabilities were as follows:     March 31,     2021   2020 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 30,432 $ 25,973 Accrued expenses   109,740   105,171 Policy benefit and losses, claims and loss expenses payable, net   26,799   20,189 Operating leases   19,370   22,353 Total deferred tax assets $ 186,341 $ 173,686           Deferred tax liabilities:

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Mar. 31, 2021
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 15.   Employee Benefit Plans Profit Sharing Plans We provide tax-qualified profit sharing retirement plans for the benefit of eligible employees, former employees and retirees in the United States and Canada. The plans are designed to provide employees with an accumulation of funds for retirement on a tax-deferred basis and provide for annual discretionary employer contributions. Amounts to be contributed are determined by the President and Chairman of the Board of Directors (the “Board”) of the Company under the delegation of authority from the Board, pursuant to the terms of the Profit Sharing Plan. No contributions were made to the profit sharing plan during fiscal 2021, 2020 or 2019. We also provide an employee savings plan which allows participants to defer income under Section 401(k) of the Internal Revenue Code of 1986. ESOP Plan We sponsor an Employee Stock Ownership Plan (“ESOP”) that generally covers all employees with one year or more of service. The ESOP began as a leveraged plan where shares were pledged as collateral for its debt which was originally funded by U-Haul. We made annual contributions to the ESOP equal to the ESOP's debt service. As the debt was repaid, shares were released from collateral and allocated to active employees, based on the proportion of debt service paid in the year. ESOP shares were committed to be released monthly and ESOP compensation expense was recorded based on the current market price at the end of the month. These shares then become outstanding for the earnings per share computations.   In fiscal 2020 we de-levered the plan and now contributions are made at the discretion of management with expense being recognized upon the decision to contribute.   ESOP compensation expense was $ 23.0 million, $ 10.3 million and $ 11.3 million for fiscal 2021, 2020 and 2019, respectively, which are included in operating expenses in the consolidated statements of operations. Listed below is a summary of these financing arrangements as of fiscal year-end:     Outstanding as of   Interest Payments Financing Date   March 31, 2021   2021   2020   2019     (In thousands) June, 1991 $ - $ - $ - $ 1 July, 2009   -   -   9   17 February, 2016   -   -   229   190 Leveraged contributions to the Plan Trust during fiscal 2020 and 2019 were $ 5.6 million and $ 1.0 million, respectively. There was no leveraged contribution in fiscal 2021. In fiscal 2021, 2020 and 2019, the Company made non-leveraged contributions of $ 23.0 million, $ 4.0 and $ 5.2 million, respectively to the Plan Trust. In both fiscal 2021 and 2020, $ 0.0 million of dividends from unallocated shares were applied to debt. Shares held by the ESOP were as follows:     Years Ended March 31,     2021   2020     (In thousands) Allocated shares   951   1,003 Unreleased shares - leveraged   -   - Fair value of unreleased shares - leveraged $ - $ - Unreleased shares - non-leveraged   -   - Fair value of unreleased shares - non-leveraged $ - $ - The fair value of unreleased shares issued prior to 1992 is defined as the historical cost of such shares. The fair value of unreleased shares issued subsequent to December 31, 1992 is defined as the trading value of such shares as of March 31, 2021 and March 31, 2020, respectively. During fiscal 2021, we released for allocation 38,015 non-leveraged shares. As of March 31, 2021, it is estimated there will be no shares committed to be released. F- 30   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Post Retirement and Post Employment Benefits We provide a health reimbursement benefit to our eligible U.S. employees and their eligible dependents upon retirement from the Company. The retiree must have attained age sixty-five and earned twenty years of full-time service upon retirement to be awarded the health reimbursement benefit. The health reimbursement benefit is capped at a $ 20,000 lifetime maximum per covered person. Reimbursements are coordinated with Medicare and any other medical policies in force. In addition, retirees who have attained age sixty-five and earned at least twenty years of full-time service upon retirement from the Company are entitled to group term life insurance benefits. The life insurance benefit is $ 3,000 plus $ 100 for each year of employment over twenty years. The benefits are not funded, and claims are paid as they are incurred. We use a March 31 measurement date for our post retirement benefit disclosures. The components of net periodic post retirement benefit cost were as follows:     Years Ended March 31,     2021   2020   2019     (In thousands) Service cost for benefits earned during the period $ 1,267 $ 1,055 $ 1,108 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   919   964   943 Other components   68   90   70 Total other components of net periodic benefit costs   987   1,054   1,013 Net periodic postretirement benefit cost $ 2,254 $ 2,109 $ 2,121 The fiscal 2021 and fiscal 2020 post retirement benefit liability included the following components:     Years Ended March 31,     2021   2020     (In thousands) Beginning of year $ 27,503 $ 25,817 Service cost for benefits earned during the period   1,267   1,055 Interest cost on accumulated post retirement benefit   919   964 Net benefit payments and expense   (841)   (93) Actuarial (gain) loss   1,907   (240) Accumulated postretirement benefit obligation   30,755   27,503           Current liabilities   1,334   1,151 Non-current liabilities   29,421   26,352           Total post retirement benefit liability recognized in statement of financial position   30,755   27,503 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (5,286)   (3,447) Cumulative net periodic benefit cost (in excess of employer contribution) $ 25,469 $ 24,056 The discount rate assumptions in computing the information above were as follows:     Years Ended March 31,     2021 2020 2019     (In percentages)   Accumulated postretirement benefit obligation   2.93 % 3.37 % 3.83 % F- 31   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) In December 2003, the Medicare Prescription Drug Improvement and Modernization Act of 2003 became law. Net periodic post retirement benefit cost above includes the effect of the subsidy. The discount rate represents the expected yield on a portfolio of high grade (AA to AAA rated or equivalent) fixed income investments with cash flow streams sufficient to satisfy benefit obligations under the plan when due. Fluctuations in the discount rate assumptions primarily reflect changes in U.S. interest rates. The assu

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 16.   Fair Value Measurements Certain assets and liabilities are recorded at fair value on the consolidated balance sheets and are measured and classified based upon a three-tiered approach to valuation. Financial assets and liabilities recorded at fair value and are classified and disclosed in one of the following three categories: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;   Level 2 - Quoted prices for identical or similar financial instruments in markets that are not considered to be active, or similar financial instruments for which all significant inputs are observable, either directly or indirectly, or inputs other than quoted prices that are observable, or inputs that are derived principally from or corroborated by observable market data through correlation or other means; and Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and are unobservable. These reflect management's assumptions about the assumptions a market participant would use in pricing the asset or liability. A financial instrument's level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Fair values of cash equivalents approximate carrying value due to the short period of time to maturity. Fair values of short-term investments, 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. F- 32   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) 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 As of March 31, 2021   Carrying Value   Level 1   Level 2   Level 3   Total Estimated 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 Hierarchy As of March 31, 2020   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 186,672 $ - $ - $ 186,672 $ 186,672 Mortgage loans, net   262,688   -   -   262,688   262,688 Other investments   97,685   -   -   97,685   97,685 Total $ 547,045 $ - $ - $ 547,045 $ 547,045                                             Liabilities                     Notes, loans and finance leases payable $ 4,651,068   - $ 4,651,068 $ - $ 4,342,308 Total $ 4,651,068 $ - $ 4,651,068 $ - $ 4,342,308 F- 33   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) The following tables represent the financial assets and liabilities on the condensed consolidated balance sheets as of March 31, 2021 and 2020, that are measured at fair value on a recurring basis and the level within the fair value hierarchy.   As of March 31, 2021   Total   Level 1   Level 2   Level 3

Reinsurance and Policy Benefits

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable	F- 34   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Note 17.   Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable During their normal course of business, our insurance subsidiaries assume and cede reinsurance on both a coinsurance and a risk premium basis. They also obtain reinsurance for that portion of risks exceeding their retention limits. The maximum amount of life insurance retained on any one life is $ 150,000 .       Direct Amount (a)   Ceded to Other Companies   Assumed from Other Companies   Net Amount (a)   Percentage of Amount Assumed to Net       (In thousands)   Year ended December 31, 2020                       Life insurance in force $ 1,031,634 $ 73 $ 356,266 $ 1,387,827   26 % Premiums earned:                       Life $ 58,048 $ 1 $ 5,049 $ 63,096   8 % Accident and health   57,081   211   1,388   58,258   2 % Annuity   221   -   34   255   13 % Property and casualty   70,285   -   -   70,285   - % Total $ 185,635 $ 212 $ 6,471 $ 191,894                               Year ended December 31, 2019                       Life insurance in force $ 957,280 $ 7 $ 441,563 $ 1,398,836   32 % Premiums earned:                       Life $ 53,289 $ 1 $ 5,629 $ 58,917   10 % Accident and health   66,863   226   1,563   68,200   2 % Annuity   65   -   794   859   92 % Property and casualty   69,126   -   15   69,141   - % Total $ 189,343 $ 227 $ 8,001 $ 197,117                               Year ended December 31, 2018                       Life insurance in force $ 941,822 $ 207 $ 548,152 $ 1,489,767   37 % Premiums earned:                       Life $ 51,691 $ (1) $ (69,616) $ (17,924)   388 % Accident and health   77,813   267   1,851   79,397   2 % Annuity   1,221   -   794

Leases

Leases	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases Of Lessee Disclosure [Text Block]	Note 18. 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. Our self-moving equipment rental related revenues have been accounted for under the revenue accounting standard Topic 606, until the adoption of Topic 842. For the periods after April 1, 2019, we combined all lease and non-lease components of lease contracts for which the timing and pattern of transfer are the same and the lease component meets the classification of an operating lease, and account for them in accordance with Topic 842. The revenue streams accounted for in accordance with Topic 842 are recognized evenly over the period of rental. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements. Lessee We determine if an arrangement is a lease at inception. Operating leases, which are comprised primarily of storage rental locations, are included in ROU assets - operating 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 condensed consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the expected remaining lease term. We use our incremental borrowing rate based on information available at commencement date, including the rate for a fully collateralized loan that can either be fully amortized or financed with a residual at the end of the lease term, for a borrower with similar credit quality in order to determine the present value of lease payments. Our lease terms may include options to extend or terminate the lease, which are included in the calculation of ROU assets when it is reasonably certain that we will exercise those options. Lease expense for lease payments is recognized on a straight-line basis over the lease term. F- 38   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) 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. Adoption of Topic 842 resulted in most of our operating lease commitments being recognized as operating lease liabilities and ROU assets, which increased total assets and total liabilities by approximately $ 105.4 million related to property operating leases, as of April 1, 2019. In addition, we reclassified a net amount of $ 948.2 million related to vehicle financing leases from property, plant and equipment, net to ROU assets financing, net. 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.   New sale leaseback transactions that fail to qualify as a sale are accounted for as a financial liability.   Please see Note 9, Borrowings, of the Notes to Consolidated Financial Statements for additional information. The following table shows the components of our ROU assets, net:     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 March 31, 2020     Finance   Operating   Total     (In thousands)               Buildings and improvements $ - $ 125,547 $ 125,547 Furniture and equipment   21,113   -   21,113 Rental trailers and other rental equipment   219,581   -   219,581 Rental trucks   1,634,572   -   1,634,572 Right-of-use assets, gross   1,875,266   125,547   2,000,813 Less: Accumulated depreciation   (794,913)   (18,916)   (813,829) Right-of-use assets, net $ 1,080,353 $ 106,631 $ 1,186,984   As of March 31, 2021 and 2020, we had finance leases for the ROU assets, net of $ 513.6 million and $ 734.9 million, respectively and operating leases of $ 92.5 million and $ 106.4 million, respectively.       Financing leases       March 31,       2021   2020   Weighted average remaining lease term (years)   3   4   Weighted average discount rate   3.6 % 3.5 %   F- 39   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued)     Operating leases       March 31,       2021   2020   Weighted average remaining lease term (years)   14.7   14   Weighted average discount rate   4.6 % 4.6 %   For the last twelve months ended March 31, 2021 and 2020, cash paid for leases included in our operating cash flow activities were $ 29.3 million and $ 25.9 million, respectively and our financing cash flow activities were $221.2 million and $307.8 million, respectively.   Non-cash activities of ROU assets in exchange for lease liabilities were $6.8 million and $15.4 million for fiscal 2021 and 2020, respectively. The components of lease costs, including leases of less than 12 months, were as follows:     Twelve Months Ended March 31,     2021   2020     (In thousands)           Operating lease costs $ 30,551 $ 27,494           Finance lease cost:         Amortization of right-of-use assets $ 150,994 $ 186,860 Interest on lease liabilities   22,405   30,901 Total finance lease cost $ 173,399 $ 217,761   Maturities of lease liabilities were as follows:     Finance leases   Operating leases

Contingencies

Contingencies	12 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Note 19.   Contingencies COVID-19 In late 2019, COVID-19 was first detected in Wuhan, China. 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. F- 40   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) During fiscal 2021, 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 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 IRS to carryback net operating losses. These refund claims total approximately $ 366 million, none of which has been received at this time and are reflected in Prepaid expense. As refunds are received, they will reduce this amount. We have estimated and recorded the overall effects of the CARES Act and do not anticipate a material change. It is possible future legislation could reduce or delay our ability to carryback these losses. Environmental Compliance with environmental requirements of federal, state and local governments may significantly affect Real Estate's business operations. Among other things, these requirements regulate the discharge of materials into the air, land and water and govern the use and disposal of hazardous substances. Real Estate is aware of issues regarding hazardous substances on some of its properties. Real Estate regularly makes capital and operating expenditures to stay in compliance with environmental laws and has put in place a remedial plan at each site where it believes such a plan is necessary. Since 1988, Real Estate has managed a testing and removal program for underground storage tanks. 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 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.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Note 20.   Related Party Transactions As set forth in the Company's Audit Committee Charter and consistent with 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 SEC rules and regulations and in accordance with GAAP. Accordingly, all such related party transactions are submitted to the Audit Committee for ongoing review and oversight. Our internal processes are designed to ensure that our legal and finance departments identify and monitor potential related party transactions that may require disclosure and Audit Committee oversight. 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. F- 41   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) SAC Holding Corporation and SAC Holding II Corporation (collectively “SAC Holdings”) were established in order to acquire and develop self-storage properties. These properties are being managed by us pursuant to management agreements.   SAC Holdings, Four SAC Self-Storage Corporation, Five SAC Self-Storage Corporation, Galaxy Investments, L.P. and 2015 SAC Self-Storage, LLC are substantially controlled by Blackwater Investments, Inc. (“Blackwater”). Blackwater is wholly owned by Willow Grove Holdings LP, which is owned by Mark V. Shoen (a significant stockholder), and various trusts associated with Edward J. Shoen (our Chairman of the Board, President and a significant stockholder) and Mark V. Shoen. Related Party Revenues     Years Ended March 31,     2021   2020   2019     (In thousands) U-Haul management fee revenue from Blackwater $ 25,512 $ 24,014 $ 23,986 U-Haul management fee revenue from Mercury   6,091   6,392   5,162   $ 31,603 $ 30,406 $ 29,148   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 $ 31.2 million, $ 29.0 million and $ 30.0 million from the above-mentioned entities during fiscal 2021, 2020 and 2019, 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     Years Ended March 31,     2021   2020   2019     (In thousands) U-Haul lease expenses to Blackwater $ 2,612 $ 2,631 $ 2,678 U-Haul commission expenses to Blackwater   69,212   62,066   61,434   $ 71,824 $ 64,697 $ 64,112 We lease space for marketing company offices, vehicle repair shops and hitch installation centers from subsidiaries of Blackwater. The terms of the leases are similar to the terms of leases for other properties owned by unrelated parties that are leased to us. As of March 31, 2021, subsidiaries of Blackwater acted as U-Haul independent dealers. The financial and other terms of the dealership contracts with the aforementioned companies and their subsidiaries are substantially identical to the terms of those with our other independent dealers whereby commissions are paid by us based upon equipment rental revenues. These agreements and notes with subsidiaries of Blackwater, excluding Dealer Agreements, provided revenues of $ 25.5 million, expenses of $ 2.6 million and cash flows of $ 22.6 million during fiscal 2021. Revenues and commission expenses related to the Dealer Agreements were $ 323.8 million and $ 69.2 million, respectively for fiscal 2021. In June 2020, we purchased an airplane from SAC Holdings for $ 0.4 million. In December 2020, AMERCO contributed $ 12.0 million to Oxford in the form of a surplus note with an interest rate of 4.0 %. This note will be repaid to AMERCO with interest over the next seven years . Management determined that we do not have a variable interest pursuant to the VIE model under ASC 810 in the holding entities of Blackwater. F- 42   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued)   Related Party Assets     March 31,     2021   2020     (In thousands) U-Haul receivable from Blackwater $ 27,116 $ 25,293 U-Haul receivable from Mercury   9,632   9,893 Other (a)   (1,353)   (402)   $ 35,395 $ 34,784 (a) Timing differences for intercompany balances with insurance subsidiaries resulting from the three month difference in reporting periods.   Note 21.   Statutory Financial Information of Insurance Subsidiaries Applicable laws and regulations of the States of Arizona and Nevada require Property and Casualty Insurance and Life Insurance to maintain minimum capital and surplus determined in accordance with statutory accounting principles. Audited statutory net income and statutory capital and surplus for the years ended are listed below:     Years Ended December 31,     2020   2019   2018     (In thousands) Repwest:             Audited statutory net income $ 22,898 $ 28,614 $ 23,960 Audited statutory capital and surplus   227,380   226,999   216,763 ARCOA:             Audited statutory net income   2,438   2,906   1,612 Audited statutory capital and surplus   15,928   12,851   9,390 Oxford:             Audited statutory net income   6,296   18,599   11,367 Audited statutory capital and surplus   218,301   223,264   203,723 CFLIC:             Audited statutory net income   8,082   8,043   8,735 Audited statutory capital and surplus   25,980   26,305   27,232 NAI:             Audited statutory net income   2,127   1,942   1,436 Audited statutory capital and surplus   13,980   13,371   12,817   The amount of dividends that can be paid to shareholders by insurance companies domiciled in the State of Arizona is limited. There are restrictions on the ability of our insurance subsidiaries to transfer funds to us in the form of cash dividends, loans or advances. Their ordinary dividends are limited to the lower of 10% of prior year statutory surplus or prior year net income. Any extraordinary dividend, loans or advances to us from the insurance subsidiaries must be approved by the domiciliary insurance commissioner. Any dividend in excess of the limit requires prior regulatory approval. The statutory surplus for Repwest at December 31, 2020 that could be distributed as ordinary dividends was $ 22.7 million. The statutory surplus for Oxford at December 31, 2020 that could be distributed as ordinary dividends was $ 6.3 million. Repwest paid a dividend of $ 22.6 and $ 21.6

Statutory Financial Information

Statutory Financial Information of Insurance Subsidiaries	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Statutory Financial Information of Insurance Subsidiaries	Note 21.   Statutory Financial Information of Insurance Subsidiaries Applicable laws and regulations of the States of Arizona and Nevada require Property and Casualty Insurance and Life Insurance to maintain minimum capital and surplus determined in accordance with statutory accounting principles. Audited statutory net income and statutory capital and surplus for the years ended are listed below:     Years Ended December 31,     2020   2019   2018     (In thousands) Repwest:             Audited statutory net income $ 22,898 $ 28,614 $ 23,960 Audited statutory capital and surplus   227,380   226,999   216,763 ARCOA:             Audited statutory net income   2,438   2,906   1,612 Audited statutory capital and surplus   15,928   12,851   9,390 Oxford:             Audited statutory net income   6,296   18,599   11,367 Audited statutory capital and surplus   218,301   223,264   203,723 CFLIC:             Audited statutory net income   8,082   8,043   8,735 Audited statutory capital and surplus   25,980   26,305   27,232 NAI:             Audited statutory net income   2,127   1,942   1,436 Audited statutory capital and surplus   13,980   13,371   12,817   The amount of dividends that can be paid to shareholders by insurance companies domiciled in the State of Arizona is limited. There are restrictions on the ability of our insurance subsidiaries to transfer funds to us in the form of cash dividends, loans or advances. Their ordinary dividends are limited to the lower of 10% of prior year statutory surplus or prior year net income. Any extraordinary dividend, loans or advances to us from the insurance subsidiaries must be approved by the domiciliary insurance commissioner. Any dividend in excess of the limit requires prior regulatory approval. The statutory surplus for Repwest at December 31, 2020 that could be distributed as ordinary dividends was $ 22.7 million. The statutory surplus for Oxford at December 31, 2020 that could be distributed as ordinary dividends was $ 6.3 million. Repwest paid a dividend of $ 22.6 and $ 21.6 million to AMERCO during fiscal 2021 and 2020, respectively. Repwest did not pay a dividend to AMERCO in fiscal 2019. Oxford paid a dividend of $18.6 million to AMERCO during fiscal 2021.   Oxford did not pay a dividend to AMERCO in fiscal 2020 or 2019. Restricted net assets for our insurance subsidiaries were $ 105.4 million and $ 98.5 million as of December 31, 2020 and 2019, respectively. F- 43   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) For our insurance subsidiaries, statutory accounting principles (“SAP”) differ from GAAP primarily in that: (i) premiums from deferred annuities are recognized as revenue under SAP, while they are accounted for as liabilities from investment contracts under GAAP; (ii) policy acquisition costs are expensed as incurred under SAP, while they are deferred and amortized over the effective period of the related life insurance policies or the present value of actual and expected gross profits from annuity deposits; (iii) policy benefits and losses are established using different actuarial assumptions; and (iv) investments are valued on a different basis and valuation allowances attributable to investments are different. In addition, certain assets are not admitted under SAP and are charged directly to surplus.

Financial Information by Geogra

Financial Information by Geographic Area Data	12 Months Ended
	Mar. 31, 2021
Segments, Geographical Areas [Abstract]
Industry Segment and Geographic Area Data	Note 22.   Financial Information by Geographic Area     United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2021             Total revenues $ 4,334,083 $ 207,902 $ 4,541,985 Depreciation and amortization, net of gains on disposal   631,344   10,160   641,504 Interest expense   160,429   3,073   163,502 Pretax earnings   773,030   23,628   796,658 Income tax expense   180,845   4,957   185,802 Identifiable assets   14,212,978   438,628   14,651,606       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2020             Total revenues $ 3,797,849 $ 181,019 $ 3,978,868 Depreciation and amortization, net of gains on disposal   652,110   15,414   667,524 Interest expense   157,595   3,355   160,950 Pretax earnings   372,687   5,437   378,124 Income tax expense (benefit)   (65,842)   1,918   (63,924) Identifiable assets   13,016,942   421,082   13,438,024       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2019             Total revenues $ 3,597,285 $ 171,422 $ 3,768,707 Depreciation and amortization, net of gains on disposal   575,134   7,421   582,555 Interest expense   139,573   2,872   142,445 Pretax earnings   466,175   11,354   477,529 Income tax expense   103,578   3,094   106,672 Identifiable assets   11,526,876   364,837   11,891,713

Consolidating Financial Informa

Consolidating Financial Information by Industry Segment	12 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Consolidating Financial Information by Industry Segment	F- 44   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Note 22A.   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    U-Haul and Real Estate; Property and Casualty Insurance, comprised of Repwest and its subsidiaries and ARCOA; and Life Insurance, comprised of Oxford and its subsidiaries. Management tracks revenues separately, but does not report any separate measure of the profitability for rental vehicles, rentals of self-storage spaces and sales of products that are required to be classified as a separate operating segment and accordingly does not present these as separate reportable segments. Deferred income taxes, net are shown as liabilities on the consolidating statements. The information includes elimination entries necessary to consolidate AMERCO, the parent, with its subsidiaries. Investments in subsidiaries are accounted for by the parent using the equity method of accounting.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Note 23.   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 for fiscal 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. The basis for this conclusion is that the customer does not receive the product/propane or benefit from the installation services until the related performance obligation is satisfied. These products/services being provided have an alternative use as they are not customized and can be sold/provided to any customer. In addition, we only have the right to receive payment once the products have been transferred to the customer or the installation services have been completed. Although product sales have a right of return policy, our estimated obligation for future product returns is not material to the financial statements at this time. Property management fees are recognized over the period that agreed-upon services are provided. The performance obligation for this portfolio of contracts is property management services, which represents a series of distinct days of service, each of which is comprised of activities that may vary from day to day. However, those tasks are activities to fulfill the property management services and are not separate promises in the contract. We determined that each increment of the promised service is distinct. This is because the customer can benefit from each increment of service on its own and each increment of service is separately identifiable because no day of service significantly modifies or customizes another and no day of service significantly affects either the entity's ability to fulfill another day of service or the benefit to the customer of another day of service. As such, we concluded that the performance obligation is satisfied over time. Additionally, in certain contracts the Company has the ability to earn an incentive fee based on operational results. We measure and recognize the progress toward completion of the performance obligation on a quarterly basis using the most likely amount method to determine an accrual for the incentive fee portion of the compensation received in exchange for the property management service. The variable consideration recognized is subject to constraints due to a range of possible consideration amounts based on actual operational results. The amount accrued in the third quarter of fiscal 2021 did not have a material effect on our financial statements. F- 59   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Other revenue consists of numerous services or rentals, of which U-Box contracts and service fees from Moving Help are the main components. The performance obligations identified for U-Box contracts are fees for rental, storage and shipping of U-Box containers to a specified location, each of which are distinct. A contract may be partially within the scope of Topic 606 and partially within the scope of other topics. The rental and storage obligations in U-Box contracts meet the definition of a lease in Topic 842, while the shipping obligation represents a contract with a customer accounted for under Topic 606. Therefore, we allocate the total transaction price between the performance obligations of storage fees and rental fees and the shipping fees on a standalone selling price basis. U-Box shipping fees are collected once the shipment is in transit. Shipping fees in U-Box contracts are set at the initiation of the contract based on the shipping origin and destination, and the performance obligation is satisfied over time. U-Box shipping contracts span over a relatively short period of time, and the majority of these contracts begin and end within the same fiscal year. Moving Help services fees are recognized in accordance with Topic 606. Moving Help services are generated as we provide a neutral venue for the connection between the service provider and the customer for agreed upon services. We do not control the specified services provided by the service provider before that service is transferred to the customer. Revenue Recognized in Accordance with Topic 842/840 Our self-moving rental revenues meet the definition of a lease pursuant to the guidance in ASC Topic 842, Leases (“Topic 842”) because those substitution rights do not provide an economic benefit to the Company that would exceed the cost of exercising the right.   Therefore, upon adoption of Topic 842 on April 1, 2019, self-rental contracts are being accounted for as leases. We do not expect this change to result in a change in the timing and pattern of recognition of the related revenues due to the short-term nature of the self-moving rental contracts. Please see Note 18, Leases, of the Notes to 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. 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           (In thousands)                           Self-moving equipment rentals $ 4,740 $ - $ - $ - $ - $ - Property lease revenues   19,099   13,079   9,612   7,210   5,648   55,060 Total $ 23,839 $ 13,079 $ 9,612 $ 7,210 $ 5,648 $ 55,060   The amounts above do not reflect future rental revenue from the renewal or replacement of existing leases. F- 60   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) 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 ASC Topic 944, Financial Services - Insurance (“Topic 944”). 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. 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 was recognized in accordance with existing guidance in ASC Topic 825, Financial Instruments . In the following tables, the revenue is disaggregated by timing of revenue recognition:     Years Ended March 31,     2021   2020   2019           (In thousands)               Revenues recognized over time $ 182,278 $ 147,565 $ 2,814,732 Revenues recognized at a point in time   396,600   309,804   305,408 Total revenues recognized under ASC 606   578,878   457,369   3,120,140               Revenues recognized under ASC 842 or 840   3,644,798   3,182,902   406,070 Revenues recognized under ASC 944   195,371   200,768   131,563 Revenues recognized under ASC 320   122,938   137,829   110,934 Total revenues $ 4,541,985 $ 3,978,868 $ 3,768,707 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 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. Note 24 . 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 rentals of equipment.   For credit card receivables, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivables. The Company rents equipment to corporate customers in which payment terms are 30 days. The Company performs ongoing credit evaluations of its customers and assesses each customer's credit worthiness. In addition, the Company monitors collections and payments from its customers and maintains an allowance based upon applying an expected credit loss rate to receivables based on the historical loss rate from similar high risk customers adjusted for current conditions, including any specific customer collection issues identified, and forecasts of economic conditions. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. F- 61

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Mar. 31, 2021
Allowance For Credit Loss [Abstract]
Allowance For Credit Losses [Text Block]	Note 24 . 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 rentals of equipment.   For credit card receivables, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivables. The Company rents equipment to corporate customers in which payment terms are 30 days. The Company performs ongoing credit evaluations of its customers and assesses each customer's credit worthiness. In addition, the Company monitors collections and payments from its customers and maintains an allowance based upon applying an expected credit loss rate to receivables based on the historical loss rate from similar high risk customers adjusted for current conditions, including any specific customer collection issues identified, and forecasts of economic conditions. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. F- 61   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) 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). However, management has determined that the current and reasonable and supportable forecasted economic conditions have declined as compared with the economic conditions included in the historical information partially as a result of COVID-19 during the first quarter of fiscal 2021. To adjust the historical loss rates to reflect the effects of these differences in current conditions and forecasted changes, management estimated the loss rate at approximately 5 %. 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 March 31, 2021 was $ 2.8 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 March 31, 2021. Accrued Interest Receivable Accrued interest receivables on available-for-sale securities totaled $ 25.0 million as of December 31, 2020 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 wrtie off accrued interest receivables by reversing interest income (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.   An allowance for credit losses is determined using a similar methodology as before the adoption of ASC 326.   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 loan 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. F- 62   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) When management determines that foreclosure is probable, an allowance for expected credit losses based on the fair value of the collateral is recorded, if necessary. Reinsurance recoverable Reinsurance recoverable on paid and unpaid benefits was less than 1 % of the total assets as of January 1, 2020 which is immaterial based on historical loss experience and high credit rating of the reinsurers. Premium receivable Premiums receivable   were $ 3.0 million as of January 1, 2020 in which the credit loss allowance is immaterial based on our ability to cancel the policy if the policyholder does not pay premiums. The following details the changes in the Company's reserve allowance for credit losses for trade receivables, fixed maturities and investments, other for the twelve months of fiscal 2021:     Allowance for Credit Losses     Trade Receivables   Investments, Fixed Maturities   Investments, other   Total                       (In thousands)     Balance as of March 31, 2020 $ 2,680 $ 503 $ 501 $ 3,684 Transition adjustment current expected credit losses   155   817   -   972 Write-offs against allowance   -   -   -   - Recoveries   -   -   -   - Balance as of March 31, 2021 $ 2,835 $ 1,320 $ 501 $ 4,656   Note 25.   Subsequent Events Our management has evaluated subsequent events occurring after March 31, 2021. We do not believe any other subsequent events have occurred that would require further disclosure or adjustment to our financial statements. F- 63

Subsequent Events

Subsequent Events	12 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Note 25.   Subsequent Events Our management has evaluated subsequent events occurring after March 31, 2021. We do not believe any other subsequent events have occurred that would require further disclosure or adjustment to our financial statements.

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information of Amerco	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	SCHEDULE   I CONDENSED FINANCIAL INFORMATION OF AMERCO BALANCE SHEETS     March 31,     2021   2020     (In thousands) ASSETS Cash and cash equivalents $ 751,053 $ 294,528 Investment in subsidiaries   3,284,760   2,758,509 Related party assets   1,535,355   1,734,358 Other assets   413,167   502,064 Total assets $ 5,984,335 $ 5,289,459           LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities:         Other liabilities $ 1,136,742 $ 1,068,291     1,136,742   1,068,291 Stockholders' equity:         Preferred stock   -   - Common stock   10,497   10,497 Additional paid-in capital   454,029   454,029 Accumulated other comprehensive income (loss)   102,568   35,100 Retained earnings:         Beginning of period   4,399,192   3,976,752 Adjustment for adoption of Topic 326   (2,880)   - Net earnings   610,856   442,048 Dividends   (49,019)   (19,608) End of period   4,958,149   4,399,192           Cost of common shares in treasury   (525,653)   (525,653) Cost of preferred shares in treasury   (151,997)   (151,997) Total stockholders' equity   4,847,593   4,221,168 Total liabilities and stockholders' equity $ 5,984,335 $ 5,289,459 The accompanying notes are an integral part of these condensed financial statements. F- 64     CONDENSED FINANCIAL INFORMATION OF AMERCO STATEMENTS OF OPERATIONS     Years Ended March 31,     2021   2020   2019     (In thousands, except share and per share data) Revenues:             Net interest income and other revenues $ 720 $ 6,586 $ 8,601 Expenses:             Operating expenses   6,753   10,622   8,840 Other expenses   115   96   93 Total expenses   6,868   10,718   8,933 Equity in earnings of subsidiaries   508,632   205,940   279,589 Interest income   135,673   130,670   112,649 Pretax earnings   638,157   332,478   391,906 Income tax benfefit (expense)   (27,301)   109,570   (21,049) Earnings available to common shareholders $ 610,856 $ 442,048 $ 370,857 Basic and diluted earnings per common share $ 31.15 $ 22.55 $ 18.93 Weighted average common shares outstanding: Basic and diluted   19,607,788   19,603,708   19,592,048 The accompanying notes are an integral part of these condensed financial statements.   CONDENSED FINANCIAL INFORMATION OF AMERCO STATEMENTS OF comprehensive income     Years Ended March 31,     2021   2020   2019     (In thousands)               Net earnings $ 610,856 $ 442,048 $ 370,857 Other comprehensive income (loss)   72,205   101,350   (62,075) Total comprehensive income $ 683,061 $ 543,398 $ 308,782 The accompanying notes are an integral part of these condensed financial statements.   F- 65     CONDENSED FINANCIAL INFORMATION OF AMERCO STATEMENTS OF CASH FLOW     Years Ended March 31,     2021   2020   2019     (In thousands) Cash flows from operating activities:             Net earnings $ 610,856 $ 442,048 $ 370,857 Change in investments in subsidiaries   (508,632)   (205,94

Notes to Condensed Financial In

Notes to Condensed Financial Information for Amerco Only	12 Months Ended
	Mar. 31, 2021
1. Summary of Significant Accounting Policies	Note 3.   Accounting Policies Use of Estimates The preparation of financial statements in conformity with the generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. The accounting policies that we deem most critical to us and that require management's most difficult and subjective judgments include the principles of consolidation, the recoverability of property, plant and equipment, the adequacy of insurance reserves, the recognition and measurement of impairments for investments accounted for under ASC 320 - Investments - Debt and Equity Securities and the recognition and measurement of income tax assets and liabilities. The actual results experienced by us may materially differ from management's estimates. Cash and Cash Equivalents We consider cash equivalents to be highly liquid debt securities with insignificant interest rate risk with original maturities from the date of purchase of three months or less. Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash deposits. Accounts at each United States financial institution are insured by the Federal Deposit Insurance Corporation up to $ 250,000 . Accounts at each Canadian financial institution are insured by the Canada Deposit Insurance Corporation up to $ 100,000 CAD per account. As of March 31, 2021 and March 31, 2020, we held cash equivalents in excess of these insured limits. To mitigate this risk, we select financial institutions based on their credit ratings and financial strength. F- 11   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Investments Fixed Maturities and Marketable Equities. Fixed maturity investments consist of either marketable debt, equity or redeemable preferred stocks. As of the balance sheet dates, all of our investments in these securities were classified as available-for-sale. Available-for-sale investments are reported at fair value, with unrealized gains or losses recorded net of taxes and applicable adjustments to deferred policy acquisition costs in stockholders' equity.   We adopted ASC Topic 326, Financial Instruments Credit Losses: (“Topic 326”) as of April 1, 2020, for available-for-sale debt securities. This new standard requires the use of forward-looking information to estimate credit losses and requires credit losses for available for sale debt securities to be recorded through an allowance for credit losses rather than a reduction in the amortized cost basis .   Changes in the market value of common stocks are recognized in earnings. Fair value for these investments is based on quoted market prices, dealer quotes or discounted cash flows. The cost of investments sold is based on the specific identification method. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Mortgage Loans and Notes on Real Estate. Mortgage loans and notes on real estate are reported at their unpaid balance, net of any allowance for expected losses and any unamortized premium or discount. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Recognition of Investment Income. Interest income from bonds and mortgage notes is recognized when earned. Dividends on common and preferred stocks are recognized on the ex-dividend dates. Realized gains and losses on the sale or exchange of investments are recognized at the trade date. Derivative Financial Instruments Our objective for holding derivative financial instruments is to manage interest rate risk exposure primarily through entering interest rate swap agreements and call options. We do not enter into these instruments for trading purposes. Counterparties to the interest rate swap agreements are major financial institutions. Derivatives are recognized at fair value on the balance sheet and are classified as prepaid expenses (asset) or accrued expenses (liability). Derivatives that are not designated as cash flow hedges for accounting purposes must be adjusted to fair value through income. If the derivative qualifies and is designated as a cash flow hedge, changes in its fair value will be recorded in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. See Note 11, Derivatives, of the Notes to Consolidated Financial Statements. Inventories and parts, net Inventories and parts, net were as follows:     March 31,     2021   2020     (In thousands) Truck and trailer parts and accessories (a) $ 95,976 $ 88,138 Hitches and towing components (b)   19,972   23,070 Moving supplies and propane (b)   12,877   11,824 Subtotal   128,825   123,032 Less: LIFO reserves   (21,832)   (18,886) Less: excess and obsolete reserves   (1,416)   (3,063) Total $ 105,577 $ 101,083           (a) Primarily held for internal usage, including equipment manufacturing and repair (b) Primarily held for retail sales           Inventories consist primarily of truck and trailer parts and accessories used to manufacture and repair rental equipment as well as products and accessories available for retail sale. Inventory is held at our owned locations; our independent dealers do not hold any of our inventory. Inventories are stated at the lower cost or net realizable value. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Inventory cost is primarily determined using the last-in first-out method (“LIFO”). Inventories valued using LIFO consisted of approximately 96 % of the total inventories for March 31, 2021 and 2020. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $21.8 million and $18.9 million higher as of March 31, 2021 and 2020, respectively. In fiscal 2021, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.4 million. Property, Plant and Equipment Our Property, plant and equipment is stated at cost. Interest expense, if any, incurred during the initial construction of buildings is considered part of cost. Depreciation is computed for financial reporting purposes using the straight line or an accelerated method based on a declining balance formula over the following estimated useful lives: rental equipment 2-20 years and buildings and non-rental equipment 3-55 years. Routine maintenance costs are charged to operating expense as they are incurred. Gains and losses on dispositions of property, plant and equipment, other than real estate (“personal property”), are netted against depreciation expense when realized. The net amount of gains, netted against depreciation expense, were $ 54.1 million, $ 27.1 million and $ 27.0 million during fiscal 2021, 2020 and 2019, respectively. Equipment depreciation is recognized in amounts expected to result in the recovery of estimated residual values upon disposal, i.e., minimize gains or losses. In determining the depreciation rate, historical disposal experience, holding periods and trends in the market for vehicles are reviewed. As a result of changes in IRS regulations regarding the capitalization of assets, beginning in the first quarter of fiscal 2017, we raised the value threshold before certain assets are capitalized within our depreciation policy. This change in threshold, results in the immediate recognition of reported operating costs with a lagging decrease in depreciation expense over the term that these assets would have been depreciated. Due to this change, we had operating expenses of $ 21.2 million and $ 27.7 million in fiscal 2021 and 2020, respectively. This change in threshold benefited us through the immediate recognition of tax deductible costs. We regularly perform reviews to determine whether facts and circumstances exist which indicate that the carrying amount of assets, including estimates of residual value, may not be recoverable or that the useful life of assets are shorter or longer than originally estimated. Reductions in residual values (i.e., the price at which we ultimately expect to dispose of revenue earning equipment) or useful lives will result in an increase in depreciation expense over the remaining life of the equipment. Reviews are performed based on vehicle class, generally subcategories of trucks and trailers. We assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their estimated remaining lives against their respective carrying amounts. We consider factors such as current and expected future market price trends on used vehicles and the expected life of vehicles included in the fleet. Impairment, if any, is based on the excess of the carrying amount over the fair value of those assets. If asset residual values are determined to be recoverable, but the useful lives are shorter or longer than originally estimated, the net book value of the assets is depreciated over the newly determined remaining useful lives. For our box truck fleet we utilize an accelerated method of depreciation based upon a declining formula. Under the declining balances method (2.4 times declining balance), the book value of a rental truck is reduced approximately 16 %, 13 %, 11 %, 9 %, 8 %, 7 %, and 6 % during years one through seven, respectively and then reduced on a straight line basis to a salvage value of 15 % by the end of year fifteen. Comparatively, a standard straight line approach would reduce the book value by approximately 5.7 % per year over the life of the truck. Although we intend to sell our used vehicles for prices approximating book value, the extent to which we realize a gain or loss on the sale of used vehicles is dependent upon various factors including, but not limited to, the general state of the used vehicle market, the age and condition of the vehicle at the time of its disposal and the depreciation rates with respect to the vehicle . We typically sell our used vehicles at our sales centers throughout the United States and Canada, on our website at uhaul.com/trucksales or by phone at 1-866-404-0355. Additionally, we sell a large portion of our pickup and cargo van fleet at automobile dealer auctions. In addition to our property, plant and equipment, we had real estate held for future development or use of $ 68.8 million and $ 69.6 million for fiscal 2021 and 2020, respectively and is included in Investments, other. F- 13   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Receivables Trade receivables include trade accounts from moving and self-storage customers and dealers, insurance premiums and amounts due from re-insurers, less management's estimate of expected losses. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Insurance premiums receivable for policies that are billed through contracted agents are recorded net of commissions payable. A commission payable is recorded as a separate liability for those premiums that are billed direct. Reinsurance recoverables include case reserves and actuarial estimates of claims incurred but not reported ("IBNR"). These receivables are not expected to be collected until after the associated claim has been adjudicated and billed to the re-insurer. The reinsurance recoverables may have little or no allowance for doubtful accounts due to the fact that reinsurance is typically procured from carriers with strong credit ratings. Furthermore, we do not cede losses to a re-insurer if the carrier is deemed financially unable to perform on the contract. Reinsurance recoverables also include insurance ceded to other insurance companies. Notes and mortgage receivables include accrued interest and are reduced by discounts and amounts considered by management to be uncollectible. Policy Benefits and Losses, Claims and Loss Expenses Payable Liabilities for future policy benefits related to life insurance, Medical supplement insurance, and deferred annuities are determined by management utilizing the net premium valuation methodology and are accrued when premium revenue is recognized. The liability, which represents the present value of future benefits to be paid to policyholders and related expenses less the present value of future net premiums, is estimated using assumptions applicable at the time the insurance contracts are written, with provisions for the risk of adverse deviation, as appropriate. Assumptions include expected mortality and morbidity experience, policy lapses and surrenders, current asset yields and expenses, and expected interest rate yields. The Company periodically performs a gross premium valuation and reviews original assumptions, including capitalized expenses which reduce the gross premium valuation, to evaluate whether the assets and liabilities are adequate and whether a loss reserve should be recognized. Liabilities for health, disability and other policies include estimates of payments to be made on insurance claims for reported losses and estimates of IBNR losses. Oxford's liabilities for deferred annuity contracts consist of contract account balances that accrue to the benefit of the policyholders. Property and Casualty Insurance's liability for reported and unreported losses is based on Repwest's historical data along with industry averages. The liability for unpaid loss adjustment expenses is based on historical ratios of loss adjustment expenses paid to losses paid. Amounts recoverable from re-insurers on unpaid losses are estimated in a manner consistent with the claim liability associated with the re-insured policy. Adjustments to the liability for unpaid losses and loss expenses as well as amounts recoverable from re-insurers on unpaid losses are charged or credited to expense in the periods in which they are made. Due to the nature of the underlying risks and high degree of uncertainty associated with the determination of the liability for future policy benefits and claims, the amounts to be ultimately paid to settle these liabilities cannot be precisely determined and may vary significantly from the estimated liability, especially for long-tailed casualty lines of business such as excess workers' compensation.   As a result of the long-tailed nature of the excess workers' compensation policies written by Repwest during 1983 through 2001, it may take a number of years for claims to be fully reported and finally settled. On a regular basis insurance reserve adequacy is reviewed by management to determine if existing assumptions need to be updated. In determining the assumptions for calculating workers' compensation reserves, management considers multiple factors including the following: Claimant longevity Cost trends associated with claimant treatments Changes in ceding entity and third party administrator reporting practices Changes in environmental factors including legal and regulatory F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Current conditions affecting claim settlements Future economic conditions including inflation We have reserved each claim based upon the accumulation of current claim costs projected through each claimant's life expectancy and then adjusted for applicable reinsurance arrangements.   Management reviews each claim bi-annually or more frequently, if there are changes in facts or circumstances to determine if the estimated life-time claim costs have increased and then adjusts the reserve estimate accordingly at that time.   We have factored in an estimate of what the potential cost increases could be in our IBNR liability.   We have not assumed settlement of the existing claims in calculating the reserve amount, unless it is in the final stages of completion. Continued increases in claim costs, including medical inflation and new treatments and medications could lead to future adverse development resulting in additional reserve strengthening.   Conversely, settlement of existing claims or if injured workers return to work or expire prematurely, could lead to future positive development. Self-Insurance Reserves U-Haul retains the risk for certain public liability and property damage programs related to our rental equipment. The consolidated balance sheets include $ 427.1 million and $ 410.1 million of liabilities related to these programs as of March 31, 2021 and 2020, respectively. These liabilities are recorded in Policy benefits and losses, claims and loss expenses payable. Management takes into account losses incurred based upon actuarial estimates, past experience, current claim trends, as well as social and economic conditions. This liability is subject to change in the future based upon changes in the underlying assumptions including claims experience, frequency of incidents, and severity of incidents. Additionally, as of March 31, 2021 and 2020, the consolidated balance sheets include liabilities of $ 17.5 million and $ 15.7 million, respectively, related to medical plan benefits we provide for eligible employees. We estimate this liability based on actual claims outstanding as of the balance sheet date as well as an actuarial estimate of IBNR claims. These amounts are recorded in Accounts payable and accrued expenses on the consolidated balance sheets. Revenue Recognition Self-moving rentals are recognized for the period that trucks and moving equipment are rented. Self-storage revenues, based upon the number of paid storage contract days, are recognized as earned during the period.   Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. Property and casualty insurance premiums are recognized as revenue over the policy periods. Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Interest and investment income are recognized as earned. Amounts collected from customers for sales tax are recorded on a net basis. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements. Advertising All advertising costs are expensed as incurred. Advertising expense was $ 18.0 million, $ 13.7 million and $ 10.6 million in fiscal 2021, 2020 and 2019, respectively.   Deferred Policy Acquisition Costs Commissions and other costs that fluctuate with and are primarily related to the successful acquisition or renewal of certain insurance premiums are deferred. For our Life Insurance's life and health insurance products, these costs are amortized, with interest, in relation to revenue such that costs are realized as a constant percentage of revenue. For its annuity insurance products the costs are amortized, with interest, in relation to the present value of actual and expected gross profits. F- 15   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Starting in fiscal 2014, new annuity contract holders were provided with a sales inducement in the form of a premium bonus (the “Sales Inducement Asset”).   Sales inducements are recognized as an asset with a corresponding increase to the policyholder liability and are amortized in a similar manner to Deferred Policy Acquisition Costs.   As of December 31, 2020 and 2019, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.0 million and $ 16.8 million, respectively on the consolidated balance sheet and amortization expense totaled $ 4.3 million, $ 5.5 million and $ 3.7 million for the periods ended December 31, 2020, 2019 and 2018, respectively. Environmental Costs Liabilities are recorded when environmental assessments and remedial efforts, if applicable, are probable and the costs can be reasonably estimated. The amount of the liability is based on management's best estimate of undiscounted future costs. Certain recoverable environmental costs related to the removal of underground storage tanks or related contamination are capitalized and amortized over the estimated useful lives of the properties. These costs are capitalized if they improve the safety or efficiency of the property or are incurred in preparing the property for sale. Income Taxes AMERCO files a consolidated tax return with all of its legal subsidiaries. The provision for income taxes reflects deferred income taxes resulting from changes in temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. Deferred tax a
Amerco [Member]
1. Summary of Significant Accounting Policies	1.   Summary of Significant Accounting Policies AMERCO, a Nevada corporation, was incorporated in April, 1969, and is the holding Company for U-Haul International, Inc., Amerco Real Estate Company, Repwest Insurance Company and Oxford Life Insurance Company. The financial statements of the Registrant should be read in conjunction with the Consolidated Financial Statements and notes thereto included in this Annual Report. AMERCO is included in a consolidated Federal income tax return with all of its U.S. subsidiaries. Accordingly, the provision for income taxes has been calculated for Federal income taxes of AMERCO and subsidiaries included in the consolidated return of AMERCO. State taxes for all subsidiaries are allocated to the respective subsidiaries. The financial statements include only the accounts of AMERCO, which include certain of the corporate operations of AMERCO. The interest in AMERCO's majority owned subsidiaries is accounted for on the equity method. The intercompany interest income and expenses are eliminated in the Consolidated Financial Statements.
2. Guarantees	2.   Guarantees AMERCO has guaranteed performance of certain long-term leases and other obligations. See Note 18, Leases, and Note 20, Related Party Transactions, of the Notes to Consolidated Financial Statements.

Schedule II - Amerco and Consol

Schedule II - Amerco and Consolidated Subsidiaries Valuation and Qualifying Accounts	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]	SCHEDULE II AMERCO AND CONSOLIDATED SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS       Balance at Beginning of Year   Additions Charged to Costs and Expenses   Additions Charged to Other Accounts   Deductions   Balance at Year End                       Year ended March 31, 2021   (In thousands) Allowance for doubtful accounts                     (deducted from trade receivable) $ 535 $ 2,179 $ 2,680 $ (973) $ 4,421 Allowance for obsolescence                     (deducted from inventory) $ 3,063 $ - $ - $ (1,647) $ 1,416 Allowance for LIFO                     (deducted from inventory) $ 18,886 $ 2,946 $ - $ - $ 21,832 Allowance for probable losses                     (deducted from mortgage loans) $ 493 $ - $ - $ (45) $ 448                       Year ended March 31, 2020     Allowance for doubtful accounts                     (deducted from trade receivable) $ 549 $ 731 $ - $ (745) $ 535 Allowance for obsolescence                     (deducted from inventory) $ 2,322 $ 741 $ - $ - $ 3,063 Allowance for LIFO                     (deducted from inventory) $ 18,987 $ - $ - $ (101) $ 18,886 Allowance for probable losses                     (deducted from mortgage loans) $ 493 $ - $ - $ - $ 493                       Year ended March 31, 2019                     Allowance for doubtful accounts                     (deducted from trade receivable) $ 496 $ 1,550 $ - $ (1,497) $ 549 Allowance for obsolescence                     (deducted from inventory) $ 5,329 $ - $ - $ (3,007) $ 2,322 Allowance for LIFO                     (deducted from inventory) $ 16,126 $ 2,861 $ - $ - $ 18,987 Allowance for probable losses                     (deducted from mortgage loans) $ 618 $ - $ - $ (125) $ 493

Schedule V - Supplemental Infor

Schedule V - Supplemental Information (for Property-Casualty Insurance Operations)	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Schedule Of Supplemental Information For Property Casualty Insurance Underwriters [Text Block]	SCHEDULE V AMERCO AND CONSOLIDATED SUBSIDIARIES SUPPLEMENTAL INFORMATION (FOR PROPERTY-CASUALTY INSURANCE Operations) Years Ended December 31, 2020, 2019, AND 2018   Fiscal Year   Affiliation with Registrant   Deferred Policy Acquisition Cost   Reserves for Unpaid Claims and Adjustment Expenses   Discount if any, Deducted   Unearned Premiums   Net Earned Premiums (1)   Net Investment Income (2)   Claim and Claim Adjustment Expenses Incurred Related to Current Year   Claim and Claim Adjustment Expenses Incurred Related to Prior Year   Amortization of Deferred Policy Acquisition Costs   Paid Claims and Claim Adjustment Expense   Net Premiums Written (1) (In thousands) 2021   Consolidated property casualty entity $ - $ 177,963 $ - $ (294) $ 70,283 $ 16,335 $ 20,670 $ (3,865) $ - $ 25,759 $ 69,989 2020   Consolidated property casualty entity   -   209,127   -   233   69,138   19,926   22,137   (9,535)   -   24,608   66,277 2019   Consolidated property casualty entity   -   228,970   -   239   60,853   9,373   19,579   (5,365)   -   19,228   61,022   (1)The earned and written premiums are reported net of intersegment transactions. There were $ 1.5 million, $ 3.1 million and $ 2.8 million in written premiums and $ 1.8 million, $ 2.8 million and $ 2.6 million in earned premiums eliminated for the years ended December 31, 2020, 2019 and 2018, respectively. (2) Net Investment Income excludes net realized (gains) losses   on investments of ($ 0.1 ) million, ($ 0.4 ) million and ($ 3.0 ) million for the years ended December 31, 2020, 2019 and 2018, respectively .

Accounting Policies (Policy Tex

Accounting Policies (Policy Text Block)	12 Months Ended
	Mar. 31, 2021
Policy Text Block [Abstract]
Use of Estimates	The preparation of financial statements in conformity with the generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. The accounting policies that we deem most critical to us and that require management's most difficult and subjective judgments include the principles of consolidation, the recoverability of property, plant and equipment, the adequacy of insurance reserves, the recognition and measurement of impairments for investments accounted for under ASC 320 - Investments - Debt and Equity Securities and the recognition and measurement of income tax assets and liabilities. The actual results experienced by us may materially differ from management's estimates.
Cash and Cash Equivalents	We consider cash equivalents to be highly liquid debt securities with insignificant interest rate risk with original maturities from the date of purchase of three months or less. Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash deposits. Accounts at each United States financial institution are insured by the Federal Deposit Insurance Corporation up to $ 250,000 . Accounts at each Canadian financial institution are insured by the Canada Deposit Insurance Corporation up to $ 100,000 CAD per account. As of March 31, 2021 and March 31, 2020, we held cash equivalents in excess of these insured limits. To mitigate this risk, we select financial institutions based on their credit ratings and financial strength.
Investments	Fixed Maturities and Marketable Equities. Fixed maturity investments consist of either marketable debt, equity or redeemable preferred stocks. As of the balance sheet dates, all of our investments in these securities were classified as available-for-sale. Available-for-sale investments are reported at fair value, with unrealized gains or losses recorded net of taxes and applicable adjustments to deferred policy acquisition costs in stockholders' equity.   We adopted ASC Topic 326, Financial Instruments Credit Losses: (“Topic 326”) as of April 1, 2020, for available-for-sale debt securities. This new standard requires the use of forward-looking information to estimate credit losses and requires credit losses for available for sale debt securities to be recorded through an allowance for credit losses rather than a reduction in the amortized cost basis .   Changes in the market value of common stocks are recognized in earnings. Fair value for these investments is based on quoted market prices, dealer quotes or discounted cash flows. The cost of investments sold is based on the specific identification method. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Mortgage Loans and Notes on Real Estate. Mortgage loans and notes on real estate are reported at their unpaid balance, net of any allowance for expected losses and any unamortized premium or discount. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Recognition of Investment Income. Interest income from bonds and mortgage notes is recognized when earned. Dividends on common and preferred stocks are recognized on the ex-dividend dates. Realized gains and losses on the sale or exchange of investments are recognized at the trade date.
Derivative Financial Instruments	Our objective for holding derivative financial instruments is to manage interest rate risk exposure primarily through entering interest rate swap agreements and call options. We do not enter into these instruments for trading purposes. Counterparties to the interest rate swap agreements are major financial institutions. Derivatives are recognized at fair value on the balance sheet and are classified as prepaid expenses (asset) or accrued expenses (liability). Derivatives that are not designated as cash flow hedges for accounting purposes must be adjusted to fair value through income. If the derivative qualifies and is designated as a cash flow hedge, changes in its fair value will be recorded in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. See Note 11, Derivatives, of the Notes to Consolidated Financial Statements.
Inventory, net	Inventories and parts, net were as follows:     March 31,     2021   2020     (In thousands) Truck and trailer parts and accessories (a) $ 95,976 $ 88,138 Hitches and towing components (b)   19,972   23,070 Moving supplies and propane (b)   12,877   11,824 Subtotal   128,825   123,032 Less: LIFO reserves   (21,832)   (18,886) Less: excess and obsolete reserves   (1,416)   (3,063) Total $ 105,577 $ 101,083           (a) Primarily held for internal usage, including equipment manufacturing and repair (b) Primarily held for retail sales           Inventories consist primarily of truck and trailer parts and accessories used to manufacture and repair rental equipment as well as products and accessories available for retail sale. Inventory is held at our owned locations; our independent dealers do not hold any of our inventory. Inventories are stated at the lower cost or net realizable value. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Inventory cost is primarily determined using the last-in first-out method (“LIFO”). Inventories valued using LIFO consisted of approximately 96 % of the total inventories for March 31, 2021 and 2020. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $21.8 million and $18.9 million higher as of March 31, 2021 and 2020, respectively. In fiscal 2021, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.4 million.
Property, Plant and Equipment	Our Property, plant and equipment is stated at cost. Interest expense, if any, incurred during the initial construction of buildings is considered part of cost. Depreciation is computed for financial reporting purposes using the straight line or an accelerated method based on a declining balance formula over the following estimated useful lives: rental equipment 2-20 years and buildings and non-rental equipment 3-55 years. Routine maintenance costs are charged to operating expense as they are incurred. Gains and losses on dispositions of property, plant and equipment, other than real estate (“personal property”), are netted against depreciation expense when realized. The net amount of gains, netted against depreciation expense, were $ 54.1 million, $ 27.1 million and $ 27.0 million during fiscal 2021, 2020 and 2019, respectively. Equipment depreciation is recognized in amounts expected to result in the recovery of estimated residual values upon disposal, i.e., minimize gains or losses. In determining the depreciation rate, historical disposal experience, holding periods and trends in the market for vehicles are reviewed. As a result of changes in IRS regulations regarding the capitalization of assets, beginning in the first quarter of fiscal 2017, we raised the value threshold before certain assets are capitalized within our depreciation policy. This change in threshold, results in the immediate recognition of reported operating costs with a lagging decrease in depreciation expense over the term that these assets would have been depreciated. Due to this change, we had operating expenses of $ 21.2 million and $ 27.7 million in fiscal 2021 and 2020, respectively. This change in threshold benefited us through the immediate recognition of tax deductible costs. We regularly perform reviews to determine whether facts and circumstances exist which indicate that the carrying amount of assets, including estimates of residual value, may not be recoverable or that the useful life of assets are shorter or longer than originally estimated. Reductions in residual values (i.e., the price at which we ultimately expect to dispose of revenue earning equipment) or useful lives will result in an increase in depreciation expense over the remaining life of the equipment. Reviews are performed based on vehicle class, generally subcategories of trucks and trailers. We assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their estimated remaining lives against their respective carrying amounts. We consider factors such as current and expected future market price trends on used vehicles and the expected life of vehicles included in the fleet. Impairment, if any, is based on the excess of the carrying amount over the fair value of those assets. If asset residual values are determined to be recoverable, but the useful lives are shorter or longer than originally estimated, the net book value of the assets is depreciated over the newly determined remaining useful lives. For our box truck fleet we utilize an accelerated method of depreciation based upon a declining formula. Under the declining balances method (2.4 times declining balance), the book value of a rental truck is reduced approximately 16 %, 13 %, 11 %, 9 %, 8 %, 7 %, and 6 % during years one through seven, respectively and then reduced on a straight line basis to a salvage value of 15 % by the end of year fifteen. Comparatively, a standard straight line approach would reduce the book value by approximately 5.7 % per year over the life of the truck. Although we intend to sell our used vehicles for prices approximating book value, the extent to which we realize a gain or loss on the sale of used vehicles is dependent upon various factors including, but not limited to, the general state of the used vehicle market, the age and condition of the vehicle at the time of its disposal and the depreciation rates with respect to the vehicle . We typically sell our used vehicles at our sales centers throughout the United States and Canada, on our website at uhaul.com/trucksales or by phone at 1-866-404-0355. Additionally, we sell a large portion of our pickup and cargo van fleet at automobile dealer auctions. In addition to our property, plant and equipment, we had real estate held for future development or use of $ 68.8 million and $ 69.6 million for fiscal 2021 and 2020, respectively and is included in Investments, other.
Receivables	Trade receivables include trade accounts from moving and self-storage customers and dealers, insurance premiums and amounts due from re-insurers, less management's estimate of expected losses. See Note 24, Allowance for Credit Losses, of the Notes to Consolidated Financial Statements. Insurance premiums receivable for policies that are billed through contracted agents are recorded net of commissions payable. A commission payable is recorded as a separate liability for those premiums that are billed direct. Reinsurance recoverables include case reserves and actuarial estimates of claims incurred but not reported ("IBNR"). These receivables are not expected to be collected until after the associated claim has been adjudicated and billed to the re-insurer. The reinsurance recoverables may have little or no allowance for doubtful accounts due to the fact that reinsurance is typically procured from carriers with strong credit ratings. Furthermore, we do not cede losses to a re-insurer if the carrier is deemed financially unable to perform on the contract. Reinsurance recoverables also include insurance ceded to other insurance companies. Notes and mortgage receivables include accrued interest and are reduced by discounts and amounts considered by management to be uncollectible.
Policy Benefits and Losses, Claims and Loss Expenses Payable	Liabilities for future policy benefits related to life insurance, Medical supplement insurance, and deferred annuities are determined by management utilizing the net premium valuation methodology and are accrued when premium revenue is recognized. The liability, which represents the present value of future benefits to be paid to policyholders and related expenses less the present value of future net premiums, is estimated using assumptions applicable at the time the insurance contracts are written, with provisions for the risk of adverse deviation, as appropriate. Assumptions include expected mortality and morbidity experience, policy lapses and surrenders, current asset yields and expenses, and expected interest rate yields. The Company periodically performs a gross premium valuation and reviews original assumptions, including capitalized expenses which reduce the gross premium valuation, to evaluate whether the assets and liabilities are adequate and whether a loss reserve should be recognized. Liabilities for health, disability and other policies include estimates of payments to be made on insurance claims for reported losses and estimates of IBNR losses. Oxford's liabilities for deferred annuity contracts consist of contract account balances that accrue to the benefit of the policyholders. Property and Casualty Insurance's liability for reported and unreported losses is based on Repwest's historical data along with industry averages. The liability for unpaid loss adjustment expenses is based on historical ratios of loss adjustment expenses paid to losses paid. Amounts recoverable from re-insurers on unpaid losses are estimated in a manner consistent with the claim liability associated with the re-insured policy. Adjustments to the liability for unpaid losses and loss expenses as well as amounts recoverable from re-insurers on unpaid losses are charged or credited to expense in the periods in which they are made. Due to the nature of the underlying risks and high degree of uncertainty associated with the determination of the liability for future policy benefits and claims, the amounts to be ultimately paid to settle these liabilities cannot be precisely determined and may vary significantly from the estimated liability, especially for long-tailed casualty lines of business such as excess workers' compensation.   As a result of the long-tailed nature of the excess workers' compensation policies written by Repwest during 1983 through 2001, it may take a number of years for claims to be fully reported and finally settled. On a regular basis insurance reserve adequacy is reviewed by management to determine if existing assumptions need to be updated. In determining the assumptions for calculating workers' compensation reserves, management considers multiple factors including the following: Claimant longevity Cost trends associated with claimant treatments Changes in ceding entity and third party administrator reporting practices Changes in environmental factors including legal and regulatory F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Current conditions affecting claim settlements Future economic conditions including inflation We have reserved each claim based upon the accumulation of current claim costs projected through each claimant's life expectancy and then adjusted for applicable reinsurance arrangements.   Management reviews each claim bi-annually or more frequently, if there are changes in facts or circumstances to determine if the estimated life-time claim costs have increased and then adjusts the reserve estimate accordingly at that time.   We have factored in an estimate of what the potential cost increases could be in our IBNR liability.   We have not assumed settlement of the existing claims in calculating the reserve amount, unless it is in the final stages of completion. Continued increases in claim costs, including medical inflation and new treatments and medications could lead to future adverse development resulting in additional reserve strengthening.   Conversely, settlement of existing claims or if injured workers return to work or expire prematurely, could lead to future positive development.
Self-Insurance Reserves	U-Haul retains the risk for certain public liability and property damage programs related to our rental equipment. The consolidated balance sheets include $ 427.1 million and $ 410.1 million of liabilities related to these programs as of March 31, 2021 and 2020, respectively. These liabilities are recorded in Policy benefits and losses, claims and loss expenses payable. Management takes into account losses incurred based upon actuarial estimates, past experience, current claim trends, as well as social and economic conditions. This liability is subject to change in the future based upon changes in the underlying assumptions including claims experience, frequency of incidents, and severity of incidents. Additionally, as of March 31, 2021 and 2020, the consolidated balance sheets include liabilities of $ 17.5 million and $ 15.7 million, respectively, related to medical plan benefits we provide for eligible employees. We estimate this liability based on actual claims outstanding as of the balance sheet date as well as an actuarial estimate of IBNR claims. These amounts are recorded in Accounts payable and accrued expenses on the consolidated balance sheets.
Revenue Recognition	Self-moving rentals are recognized for the period that trucks and moving equipment are rented. Self-storage revenues, based upon the number of paid storage contract days, are recognized as earned during the period.   Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. Property and casualty insurance premiums are recognized as revenue over the policy periods. Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Interest and investment income are recognized as earned. Amounts collected from customers for sales tax are recorded on a net basis. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements.
Advertising	All advertising costs are expensed as incurred. Advertising expense was $ 18.0 million, $ 13.7 million and $ 10.6 million in fiscal 2021, 2020 and 2019, respectively.
Deferred Policy Acquisition Cost	Commissions and other costs that fluctuate with and are primarily related to the successful acquisition or renewal of certain insurance premiums are deferred. For our Life Insurance's life and health insurance products, these costs are amortized, with interest, in relation to revenue such that costs are realized as a constant percentage of revenue. For its annuity insurance products the costs are amortized, with interest, in relation to the present value of actual and expected gross profits. F- 15   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) Starting in fiscal 2014, new annuity contract holders were provided with a sales inducement in the form of a premium bonus (the “Sales Inducement Asset”).   Sales inducements are recognized as an asset with a corresponding increase to the policyholder liability and are amortized in a similar manner to Deferred Policy Acquisition Costs.   As of December 31, 2020 and 2019, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.0 million and $ 16.8 million, respectively on the consolidated balance sheet and amortization expense totaled $ 4.3 million, $ 5.5 million and $ 3.7 million for the periods ended December 31, 2020, 2019 and 2018, respectively.
Environmental Costs	Liabilities are recorded when environmental assessments and remedial efforts, if applicable, are probable and the costs can be reasonably estimated. The amount of the liability is based on management's best estimate of undiscounted future costs. Certain recoverable environmental costs related to the removal of underground storage tanks or related contamination are capitalized and amortized over the estimated useful lives of the properties. These costs are capitalized if they improve the safety or efficiency of the property or are incurred in preparing the property for sale.
Income Taxes	AMERCO files a consolidated tax return with all of its legal subsidiaries. The provision for income taxes reflects deferred income taxes resulting from changes in temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. Deferred tax assets and liabilities represent the future tax consequence for those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses that are available to offset future taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Comprehensive Income (Loss) Comprehensive income (loss) consists of net earnings, foreign currency translation adjustments, unrealized gains and losses on investments, the change in fair value of cash flow hedges and the change in postretirement benefit obligations.
Debt issuance costs	We defer costs directly associated with acquiring third-party financing. Debt issuance costs are deferred and amortized to interest expense using the effective interest method. Debt issuance costs related to our long-term debt are reflected as a direct deduction from the carrying amount of the debt. Please see Note 9, Borrowings, of the Notes to Consolidated Financial Statements.
Adoption of New Accounting Pronouncements	On April 1, 2020, the Company adopted Topic 326. This standard requires the measurement and recognition of expected credit losses held at amortized cost. This new standard requires the use of forward-looking information to estimate credit losses and requires credit losses for available for sale debt securities to be recorded through an allowance for credit losses rather than a reduction in the amortized cost basis. We adopted Topic 326 using a modified retrospective approach. We recognized a cumulative-effect adjustment to our opening retained earnings balance in the period of adoption. Accordingly, comparative financial information has not been restated and continues to be reported under the accounting standards in effect for those periods. The impact of the adoption to our beginning retained earnings was $2.9 million. On April 1, 2020, the Company adopted ASU 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for the timing of such transfers. ASU 2018-13 expands the disclosure requirements for Level 3 fair value measurements, primarily focused on changes in unrealized gains and losses included in other comprehensive income. The adoption of the standard did not have a material impact on our consolidated financial statements. F- 16   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) On April 1, 2020, the Company adopted ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General Subtopic 715-20 - Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans (“ASU 2018-14”), which amends ASC 715 to add, remove, and clarify disclosure requirements related to defined benefit pension and other postretirement plans. The adoption of the standard did not have a material impact on our consolidated financial statements.
Recent Accounting Pronouncements	In August 2018, the 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 DAC 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 London Inter-Bank Offer Rate (“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 October 2020, FASB issued 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. We do not expect this standard to have a material impact on our consolidated financial statements. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) . This standard permits a company to apply certain optional expedients to modifications of interest rate indexes used for margining, discounting or contract price alignment of certain derivatives as a result of reference rate reform initiatives (“discounting transitions”). Extends optional expedients to account for a derivative contract modified as a continuation of the existing contract and to continue hedge accounting with certain critical terms of a hedging relationship change to modifications made as part of the discounting transition. This standard is effective immediately, may be applied as of the beginning of the interim period that includes March 12, 2020 and is available for a limited time, generally through December 31, 2022. In May 2021, the FASB issued ASU 2021-04, Earnings Per Share (Topic 260), Debt-Modifications and Extinguishments (Subtopic 470-50), Compensation (Topic 718), and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Issuer's Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options, a consensus of the Emerging Issues Task Force (EITF), to provide explicit guidance on accounting by issuers for modifications or exchanges of freestanding equity-classified written call options that remain equity classified after the modification or exchange. The guidance is effective for fiscal years beginning after December 31, 2021. We are currently evaluating the impact of this standard on our consolidated financial statements. F- 17   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued) From time to time, new accounting pronouncements are issued by the FASB or the Securities and Exchange Commission (“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.

Accounting Policies (Table Text

Accounting Policies (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventories, net	March 31,     2021   2020     (In thousands) Truck and trailer parts and accessories (a) $ 95,976 $ 88,138 Hitches and towing components (b)   19,972   23,070 Moving supplies and propane (b)   12,877   11,824 Subtotal   128,825   123,032 Less: LIFO reserves   (21,832)   (18,886) Less: excess and obsolete reserves   (1,416)   (3,063) Total $ 105,577 $ 101,083           (a) Primarily held for internal usage, including equipment manufacturing and repair (b) Primarily held for retail sales

Reinsurance Recoverables and _2

Reinsurance Recoverables and Trade Receivables, Net (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Reinsurance Recoverables and Trade Receivables, Net [Abstract]
Reinsurance Recoverables and Trade Receivables, Net	March 31,     2021   2020     (In thousands) Reinsurance recoverable $ 66,386 $ 89,020 Trade accounts receivable   121,251   59,394 Paid losses recoverable   276   624 Accrued investment income   27,883   25,744 Premiums and agents' balances   2,546   1,582 Independent dealer receivable   258   1,015 Other receivables   10,247   9,828     228,847   187,207 Less: Allowance for doubtful accounts   (4,421)   (535)   $ 224,426 $ 186,672

Investments (Table Text Block)

Investments (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Available-for-Sale Investments	Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Allowance for Expected Credit Losses   Fair Value           (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   Available-for-sale investments as of March 31, 2020 were as follows:       Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Fair Value           (in thousands) U.S. treasury securities and government obligations $ 112,421 $ 7,959 $ (1) $ - $ 120,379 U.S. government agency mortgage-backed securities   88,449   759   (1)   (373)   88,834 Obligations of states and political subdivisions   287,643   20,664   (155)   -   308,152 Corporate securities   1,656,425   100,302   (919)   (812)   1,754,996 Mortgage-backed securities   187,784   6,011   (1)   (107)   193,687 Redeemable preferred stocks   1,493   72   -   -   1,565   $ 2,334,215 $ 135,767 $ (1,077) $ (1,292) $ 2,467,613
Adjusted Cost and Estimated Market Value of Available-for-sale Investments	March 31, 2021   March 31, 2020     Amortized Cost   Fair Value   Amortized Cost   Fair Value     (In thousands) Due in one year or less $ 90,142 $ 91,190 $ 128,747 $ 129,420 Due after one year through five years   562,442   601,818   547,821   566,934 Due after five years through ten years   672,733   754,536   636,036   678,636 Due after ten years   905,567   1,019,570   832,334   897,371     2,230,884   2,467,114   2,144,938   2,272,361                   Mortgage backed securities   174,728   186,425   187,784   193,687 Redeemable preferred stocks   -   -   1,493   1,565   $ 2,405,612 $ 2,653,539 $ 2,334,215 $ 2,467,613
Available for sale equity investments	March 31, 2021   March 31, 2020     Amortized Cost   Fair Value   Amortized Cost   Fair Value     (In thousands) Common stocks $ 9,775 $ 20,440 $ 9,775 $ 20,015 Non-redeemable preferred stocks   20,034   21,677   5,076   5,110   $ 29,809 $ 42,117 $ 14,851 $ 25,125
Carrying Value of Other Investments	March 31,     2021   2020     (In thousands) Mortgage loans, net $ 391,230 $ 262,688 Short-term investments   7,234   6,995 Real estate   68,813   69,569 Policy loans   11,163   11,212 Other equity investments   11,319   9,909   $ 489,759 $ 360,373

Other Assets (Table Text Block)

Other Assets (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Other Assets [Abstract]
Other Assets	March 31,     2021   2020     (In thousands) Deposits (debt-related) $ 33,952 $ 33,020 Cash surrender value of life insurance policies   567   31,371 Deposits (real estate related)   13,211   7,565   $ 47,730 $ 71,956

Net Investment and Interest I_2

Net Investment and Interest Income (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Table Text Block [Abstract]
Net Investment and Interest Income	Years Ended March 31,     2021   2020   2019     (In thousands) Fixed maturities $ 102,021 $ 107,434 $ 99,348 Real estate   5,769   7,304   5,538 Insurance policy loans   829   974   1,305 Mortgage loans   18,248   17,164   16,674 Short-term, amounts held by ceding reinsurers, net and other investments   3,103   9,807   (7,429) Investment income   129,970   142,683   115,436 Less: investment expenses   (7,032)   (4,854)   (4,502) Investment income - related party, net eliminations   -   -   - Net investment and interest income $ 122,938 $ 137,829 $ 110,934

Borrowings (Table Text Block)

Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Debt Instruments [Abstract]
Long-Term Debt	March 31,   2021 Rates   Maturities   2021   2020                     (In thousands) Real estate loan (amortizing term)       1.61 %     2023 $ 82,913 $ 92,913 Senior mortgages 2.80 % - 6.62 % 2021 - 2038   2,125,324   2,029,878 Real estate loans (revolving credit) (a) 1.36 % - 1.61 % 2023 - 2025   535,000   519,000 Fleet loans (amortizing term) 1.61 % - 4.66 % 2022 - 2028   176,295   224,089 Fleet loans (revolving credit) 1.27 % - 2.36 % 2023 - 2025   535,000   567,000 Finance leases (rental equipment) 1.92 % - 5.04 % 2021 - 2027   513,623   734,870 Finance liability (rental equipment) 1.60 % - 4.22 % 2024 - 2029   644,375   398,834 Other obligations 2.25 % - 8.00 % 2021 - 2049   86,085   84,484 Notes, loans and finance leases payable                 $ 4,698,615 $ 4,651,068 Less: Debt issuance costs                   (29,708)   (29,777) Total notes, loans and finance leases payable, net                 $ 4,668,907 $ 4,621,291                           (a) Certain loans have interest rate swaps fixing the rate between 3.03% and 3.14% based on current margin
Annual Maturities of Notes, Loans and Leases Payable	Years Ended March 31,     2022   2023   2024   2025   2026   Thereafter   Total     (In thousands) Notes, loans and finance leases payable, secured $ 465,884 $ 593,020 $ 1,018,407 $ 769,125 $ 352,162 $ 1,500,017 $ 4,698,615

Interest on Borrowings (Table T

Interest on Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Interest Expense, Borrowings [Abstract]
Components of interest expense	Years Ended March 31,     2021   2020   2019     (In thousands) Interest expense $ 165,484 $ 180,444 $ 150,609 Capitalized interest   (11,573)   (23,517)   (12,733) Amortization of transaction costs   5,949   4,427   3,745 Interest expense resulting from cash flow hedges   3,642   (404)   824 Total interest expense   163,502   160,950   142,445
Interest rates and company borrowings	Revolving Credit Activity       Years Ended March 31,       2021   2020   2019       (In thousands, except interest rates)   Weighted average interest rate during the year   1.40 % 3.31 % 3.39 % Interest rate at year end   1.40 % 2.86 % 3.60 % Maximum amount outstanding during the year $ 1,175,000 $ 1,086,000 $ 959,400   Average amount outstanding during the year $ 1,088,293 $ 1,002,081 $ 699,415   Facility fees $ 261 $ 193 $ 374

Derivatives (Table Text Block)

Derivatives (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Derivative Instrument Detail [Abstract]
Derivative Fair Values Located in Accounts Payable and Accrued Expenses in the Balance Sheet	March 31, 2021   March 31, 2020     (In thousands) Interest rate contracts designated as hedging instruments         Assets $ - $ - Liabilities   5,141   8,214 Notional amount (debt)   235,000   235,000

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Table Text Block [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652 Foreign currency translation   (5,694)   -   -   -   (5,694) Unrealized net gain on investments   -   76,969   -   -   76,969 Change in fair value of cash flow hedges   -   -   (429)   -   (429) Amounts reclassified into earnings on hedging activities   -   -   2,746   -   2,746 Change in post retirement benefit obligaitons   -   -   -   (1,387)   (1,387) Other comprehensive income (loss)   (5,694)   76,969   2,317   (1,387)   72,205 Balance as of March 31, 2021 $ (52,929) $ 167,653 $ (3,879) $ (3,988) $ 106,857

Stockholders' Equity (Table Tex

Stockholders' Equity (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Stockholders' Equity Note [Abstract]
Common Stock Dividends	Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               December 9, 2020 $ 2.00   December 21, 2020   December 30, 2020 August 20, 2020   0.50   September 7, 2020   September 21, 2020 December 4, 2019   0.50   December 19, 2019   January 6, 2020 August 22, 2019   0.50   September 9, 2019   September 23, 2019

Provision for Taxes (Table Text

Provision for Taxes (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Table Text Block [Abstract]
Provision For Taxes	Years Ended March 31,     2021   2020   2019     (In thousands) Pretax earnings:             U.S. $ 773,030 $ 372,687 $ 466,175 Non-U.S.   23,628   5,437   11,354 Total pretax earnings $ 796,658 $ 378,124 $ 477,529               Current provision (benefit)             Federal $ 100,521 $ (373,817) $ (6,114) State   16,572   (9,600)   3,420 Non-U.S.   3,404   949   1,375     120,497   (382,468)   (1,319) Deferred provision (benefit)             Federal   53,957   307,846   94,961 State   9,795   9,728   11,311 Non-U.S.   1,553   970   1,719     65,305   318,544   107,991               Provision for income tax expense (benefit) $ 185,802 $ (63,924) $ 106,672               Income taxes paid (net of income tax refunds received) $ 29,044 $ 6,859 $ 4,255
Schedule of Effective Income Tax Rate Reconciliation	Years Ended March 31,       2021   2020   2019       (In percentages)   Statutory federal income tax rate   21.00 % 21.00 % 21.00 % Increase (reduction) in rate resulting from:               NOL tax rate benefit   - % (38.62) % - % State taxes, net of federal benefit   2.53 % 0.02 % 2.41 % Foreign rate differential   - % 0.21 % 0.15 % Federal tax credits   (0.99) % (0.53) % (0.15) % Transition tax   - % - % (0.20) % Tax-exempt income   (0.08) % (0.17) % - % Dividend received deduction   (0.01) % (0.01) % (0.01) % Other   0.87 % 1.19 % (0.86) % Actual tax expense (benefit) of operations   23.32 % (16.91) % 22.34 %
Components of Deferred Tax Assets and Liabilities	March 31,     2021   2020 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 30,432 $ 25,973 Accrued expenses   109,740   105,171 Policy benefit and losses, claims and loss expenses payable, net   26,799   20,189 Operating leases   19,370   22,353 Total deferred tax assets $ 186,341 $ 173,686           Deferred tax liabilities:         Property, plant and equipment $ 1,280,703 $ 1,198,198 Operating leases   19,370   22,353 Deferred policy acquisition costs   13,696   12,795 Unrealized gains   48,667   29,873 Other   2,394   4,010 Total deferred tax liabilities   1,364,830   1,267,229 Net deferred tax liability $ 1,178,489 $ 1,093,543
Reconciliation of Total Amounts of Unrecognized Tax Benefits	Unrecognized Tax Benefits     March 31,     2021   2020     (In thousands)           Unrecognized tax benefits beginning balance $ 29,632 $ 37,201 Revaluation based on change in after tax benefit   -   - Additions based on tax positions related to the current year   1,479   42 Reductions for tax positions of prior years   (42)   (7,606) Settlements   -   (5) Unrecognized tax benefits ending balance $ 31,069 $ 29,632

Employee Benefit Plans (Table T

Employee Benefit Plans (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Table Text Block [Abstract]
Summary Of Financing Arrangements for Leveraged ESOP Debt	Outstanding as of   Interest Payments Financing Date   March 31, 2021   2021   2020   2019     (In thousands) June, 1991 $ - $ - $ - $ 1 July, 2009   -   -   9   17 February, 2016   -   -   229   190
Shares Held by the ESOP Plan	Years Ended March 31,     2021   2020     (In thousands) Allocated shares   951   1,003 Unreleased shares - leveraged   -   - Fair value of unreleased shares - leveraged $ - $ - Unreleased shares - non-leveraged   -   - Fair value of unreleased shares - non-leveraged $ - $ -
Components of Net Periodic Post Retirement Benefit Cost	Years Ended March 31,     2021   2020   2019     (In thousands) Service cost for benefits earned during the period $ 1,267 $ 1,055 $ 1,108 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   919   964   943 Other components   68   90   70 Total other components of net periodic benefit costs   987   1,054   1,013 Net periodic postretirement benefit cost $ 2,254 $ 2,109 $ 2,121
Components of Post Retirement Benefit Liabilities	Years Ended March 31,     2021   2020     (In thousands) Beginning of year $ 27,503 $ 25,817 Service cost for benefits earned during the period   1,267   1,055 Interest cost on accumulated post retirement benefit   919   964 Net benefit payments and expense   (841)   (93) Actuarial (gain) loss   1,907   (240) Accumulated postretirement benefit obligation   30,755   27,503           Current liabilities   1,334   1,151 Non-current liabilities   29,421   26,352           Total post retirement benefit liability recognized in statement of financial position   30,755   27,503 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (5,286)   (3,447) Cumulative net periodic benefit cost (in excess of employer contribution) $ 25,469 $ 24,056
Discount Rate Assumptions for Accumulated Postretirement Benefit Obligations	Years Ended March 31,     2021 2020 2019     (In percentages)   Accumulated postretirement benefit obligation   2.93 % 3.37 % 3.83 %
Future Net Benefit Payments Expected for Post Employee Benefit Obligations	Future Net Benefit Payments     (In thousands) Year-ended:     2022 $ 1,334 2023   1,520 2024   1,719 2025   1,937 2026   2,167 2027 through 2030   12,529 Total $ 21,206

Fair Value Measurements (Table

Fair Value Measurements (Table Text Block)	12 Months Ended
	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 As of March 31, 2021   Carrying Value   Level 1   Level 2   Level 3   Total Estimated 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 Hierarchy As of March 31, 2020   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 186,672 $ - $ - $ 186,672 $ 186,672 Mortgage loans, net   262,688   -   -   262,688   262,688 Other investments   97,685   -   -   97,685   97,685 Total $ 547,045 $ - $ - $ 547,045 $ 547,045                                             Liabilities                     Notes, loans and finance leases payable $ 4,651,068   - $ 4,651,068 $ - $ 4,342,308 Total $ 4,651,068 $ - $ 4,651,068 $ - $ 4,342,308
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	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 $ -   As of March 31, 2020   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 369,279 $ 368,968 $ 311 $ - Fixed maturities - available for sale   2,466,048   7,156   2,458,731   161 Preferred stock   6,675   6,675   -   - Common stock   20,015   20,015   -   - Derivatives   5,944   5,944   -   - Total $ 2,867,961 $ 408,758 $ 2,459,042 $ 161                                     Liabilities                 Derivatives $ 8,214 $ - $ 8,214 $ - Total $ 8,214 $ - $ 8,214 $ -

Reinsurance and Policy Benefi_2

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Supplemental Schedule Of Reinsurance Premiums For Insurance Companies [Abstract]
Supplemental Schedule Of Reinsurance Premiums For Insurance Companies [Table Text Block]	Direct Amount (a)   Ceded to Other Companies   Assumed from Other Companies   Net Amount (a)   Percentage of Amount Assumed to Net       (In thousands)   Year ended December 31, 2020                       Life insurance in force $ 1,031,634 $ 73 $ 356,266 $ 1,387,827   26 % Premiums earned:                       Life $ 58,048 $ 1 $ 5,049 $ 63,096   8 % Accident and health   57,081   211   1,388   58,258   2 % Annuity   221   -   34   255   13 % Property and casualty   70,285   -   -   70,285   - % Total $ 185,635 $ 212 $ 6,471 $ 191,894                               Year ended December 31, 2019                       Life insurance in force $ 957,280 $ 7 $ 441,563 $ 1,398,836   32 % Premiums earned:                       Life $ 53,289 $ 1 $ 5,629 $ 58,917   10 % Accident and health   66,863   226   1,563   68,200   2 % Annuity   65   -   794   859   92 % Property and casualty   69,126   -   15   69,141   - % Total $ 189,343 $ 227 $ 8,001 $ 197,117                               Year ended December 31, 2018                       Life insurance in force $ 941,822 $ 207 $ 548,152 $ 1,489,767   37 % Premiums earned:                       Life $ 51,691 $ (1) $ (69,616) $ (17,924)   388 % Accident and health   77,813   267   1,851   79,397   2 % Annuity   1,221   -   794   2,015   39 % Property and casualty   60,848
Schedule of Effect of Reinsurance [Table Text Block]	December 31,     2020   2019     (In thousands) Unpaid losses and loss adjustment expense $ 177,963 $ 209,127 Reinsurance losses payable   979   1,214 Total $ 178,942 $ 210,341
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]	December 31,     2020   2019   2018     (In thousands) Balance at January 1 $ 209,127 $ 228,970 $ 233,554 Less: reinsurance recoverable   87,083   94,920   94,490 Net balance at January 1   122,044   134,050   139,064 Incurred related to:             Current year   20,670   22,137   19,579 Prior years   (3,865)   (9,535)   (5,365) Total incurred   16,805   12,602   14,214 Paid related to:             Current year   7,664   7,366   8,838 Prior years   18,095   17,242   10,390 Total paid   25,759   24,608   19,228 Net balance at December 31   113,090   122,044   134,050 Plus: reinsurance recoverable   64,873   87,083   94,920 Balance at December 31 $ 177,963 $ 209,127 $ 228,970
Shortduration Insurance Contracts Claims Development [Table Text Block]	Cumulative Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance                                 As of                                 December 31, 2020                                 Total of                                     Incurred-but-                                     Not-Reported                                     Liabilities Plus                                     Expected   Cumulative                                 Development   Number of Accident                               on Reported   Reported Year   2014   2015   2016   2017   2018   2019   2020   Claims   Claims         (In thousands, except claim counts)     2014 $ 11,691 $ 10,907 $ 10,720 $ 10,759 $ 10,748 $ 10,493 $ 10,327 $ -   10,068 2015       12,214   12,459   12,460   12,464   11,087   11,092   -   11,104 2016           13,297   13,011   13,056   11,790   11,764   -   11,469 2017               15,748   16,109   17,078   15,538   305   12,100 2018                   19,580   18,386   18,027   1,464   11,981 2019                       22,138   26,316   4,379   11,738 2020                           20,671   10,137   11,199
Shortduration Insurance Contracts Reconciliation Of Claims Development To Liability [Table Text Block]	December 31, 2020     (In thousands) Liabilities for unpaid Property and Casualty claims     and claim adjustment expenses, net of reinsurance $ 113,090       Total reinsurance recoverable on unpaid     Property and Casualty claims $ 64,873       Total gross liability for unpaid Property and Casualty     claims and claim adjustment expense $ 177,963
Shortduration Insurance Contracts Schedule Of Historical Claims Duration [Table Text Block]	Average Annual Percentage Payout of Incurred Claims by Age, net of Reinsurance     (In percentages)   Years   1   2   3   4   5   6   7   Property and Casualty Insurance   52.2 % 21.4 % 11.0 % 2.0 % 5.6 % - % - %

Leases (Table Text Block)

Leases (Table Text Block)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Supplemental Balance Sheet Information Related to Leases	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 March 31, 2020     Finance   Operating   Total     (In thousands)               Buildings and improvements $ - $ 125,547 $ 125,547 Furniture and equipment   21,113   -   21,113 Rental trailers and other rental equipment   219,581   -   219,581 Rental trucks   1,634,572   -   1,634,572 Right-of-use assets, gross   1,875,266   125,547   2,000,813 Less: Accumulated depreciation   (794,913)   (18,916)   (813,829) Right-of-use assets, net $ 1,080,353 $ 106,631 $ 1,186,984
Summary of Weighted-average remaining lease terms and Discount rates	Financing leases       March 31,       2021   2020   Weighted average remaining lease term (years)   3   4   Weighted average discount rate   3.6 % 3.5 %   F- 39   amerco and consolidated subsidiaries notes to consolidated financial statements - (continued)     Operating leases       March 31,       2021   2020   Weighted average remaining lease term (years)   14.7   14   Weighted average discount rate   4.6 % 4.6 %
Lease costs	Twelve Months Ended March 31,     2021   2020     (In thousands)           Operating lease costs $ 30,551 $ 27,494           Finance lease cost:         Amortization of right-of-use assets $ 150,994 $ 186,860 Interest on lease liabilities   22,405   30,901 Total finance lease cost $ 173,399 $ 217,761
Maturities of Lease Liabilities	Finance leases   Operating leases Year ending March 31,   (In thousands)           2022 $ 179,470 $ 24,288 2023   134,783   22,239 2024   112,732   21,257 2025   78,910   10,151 2026   47,453   4,006 Thereafter   7   62,175 Total lease payments   553,355   144,116 Less: imputed interest   (39,732)   (51,606) Present value of lease liabilities $ 513,623 $ 92,510

Related Party Transactions (Tab

Related Party Transactions (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Related Party Revenue [Abstract]
Related Party Revenue	Years Ended March 31,     2021   2020   2019     (In thousands) U-Haul management fee revenue from Blackwater $ 25,512 $ 24,014 $ 23,986 U-Haul management fee revenue from Mercury   6,091   6,392   5,162   $ 31,603 $ 30,406 $ 29,148
Related Party Cost and Expense	Years Ended March 31,     2021   2020   2019     (In thousands) U-Haul lease expenses to Blackwater $ 2,612 $ 2,631 $ 2,678 U-Haul commission expenses to Blackwater   69,212   62,066   61,434   $ 71,824 $ 64,697 $ 64,112
Due from Related Party, Recap of Assets	March 31,     2021   2020     (In thousands) U-Haul receivable from Blackwater $ 27,116 $ 25,293 U-Haul receivable from Mercury   9,632   9,893 Other (a)   (1,353)   (402)   $ 35,395 $ 34,784

Statutory Financial Informati_2

Statutory Financial Information of Insurance Subsidiaries (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Insurance [Abstract]
Statutory Financial Information of Insurance Subsidiaries	Years Ended December 31,     2020   2019   2018     (In thousands) Repwest:             Audited statutory net income $ 22,898 $ 28,614 $ 23,960 Audited statutory capital and surplus   227,380   226,999   216,763 ARCOA:             Audited statutory net income   2,438   2,906   1,612 Audited statutory capital and surplus   15,928   12,851   9,390 Oxford:             Audited statutory net income   6,296   18,599   11,367 Audited statutory capital and surplus   218,301   223,264   203,723 CFLIC:             Audited statutory net income   8,082   8,043   8,735 Audited statutory capital and surplus   25,980   26,305   27,232 NAI:             Audited statutory net income   2,127   1,942   1,436 Audited statutory capital and surplus   13,980   13,371   12,817

Financial Information by Geog_2

Financial Information by Geographic Area (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Geographic Areas, Long-Lived Assets [Abstract]
Industry Segment and Geographic Area Data	United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2021             Total revenues $ 4,334,083 $ 207,902 $ 4,541,985 Depreciation and amortization, net of gains on disposal   631,344   10,160   641,504 Interest expense   160,429   3,073   163,502 Pretax earnings   773,030   23,628   796,658 Income tax expense   180,845   4,957   185,802 Identifiable assets   14,212,978   438,628   14,651,606       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2020             Total revenues $ 3,797,849 $ 181,019 $ 3,978,868 Depreciation and amortization, net of gains on disposal   652,110   15,414   667,524 Interest expense   157,595   3,355   160,950 Pretax earnings   372,687   5,437   378,124 Income tax expense (benefit)   (65,842)   1,918   (63,924) Identifiable assets   13,016,942   421,082   13,438,024       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2019             Total revenues $ 3,597,285 $ 171,422 $ 3,768,707 Depreciation and amortization, net of gains on disposal   575,134   7,421   582,555 Interest expense   139,573   2,872   142,445 Pretax earnings   466,175   11,354   477,529 Income tax expense   103,578   3,094   106,672 Identifiable assets   11,526,876   364,837   11,891,713

Consolidating Financial Infor_2

Consolidating Financial Information by Industry Segment (Table Text Block)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Table Text Block Supplement [Abstract]
Consolidated Balance Sheet by Industry Segment	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Assets:                       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   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   8,330,615   -   -   -     8,330,615 Total assets $ 11,865,033 $ 466,274 $ 3,101,510 $ (781,211)   $ 14,651,606	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Assets:                       Cash and cash equivalents $ 459,078 $ 4,794 $ 30,480 $ -   $ 494,352 Reinsurance recoverables and trade receivables, net   60,073   93,995   32,604   -     186,672 Inventories and parts, net   101,083   -   -   -     101,083 Prepaid expenses   562,904   -   -   -     562,904 Investments, fixed maturities and marketable equities   -   288,998   2,203,740   -     2,492,738 Investments, other   20,988   90,145   249,240   -     360,373 Deferred policy acquisition costs, net   -   -   103,118   -     103,118 Other assets   69,128   680   2,148   -     71,956 Right of use assets - financing, net   1,080,353   -   -   -     1,080,353 Right of use assets - operating   106,631   -   -   -     106,631 Related party assets   41,027   7,137   18,629   (32,009) (c)   34,784     2,501,265   485,749   2,639,959   (32,009)     5,594,964                         Investment in subsidiaries   668,498   -   -   (668,498) (b)   -                         Property, plant and equipment, at cost:                       Land   1,032,945   -   -   -     1,032,945 Buildings and improvements   4,663,461   -   -   -     4,663,461 Furniture and equipment   752,363   -   -   -     752,363 Rental trailers and other rental equipment   511,520   -   -   -     511,520 Rental trucks   3,595,933   -   -   -     3,595,933     10,556,222   -   -   -     10,556,222 Less:   Accumulated depreciation   (2,713,162)   -   -   -     (2,713,162) Total property, plant and equipment   7,843,060   -   -   -     7,843,060 Total assets $ 11,012,823 $ 485,749 $ 2,639,959 $ (700,507)   $ 13,438,024
Consolidated Statement of Operations by Industry Segment	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Revenues:                       Self-moving equipment rentals $ 3,086,824 $ - $ - $ (3,507) (c) $ 3,083,317 Self-storage revenues   477,262   -   -   -     477,262 Self-moving & self-storage products & service sales   344,929   -   -   -     344,929 Property management fees   31,603   -   -   -     31,603 Life insurance premiums   -   -   121,609   -     121,609 Property and casualty insurance premiums   -   70,285   -   (1,506) (c)   68,779 Net investment and interest income   2,259   16,452   107,745   (3,518) (b)   122,938 Other revenue   288,797   -   3,280   (529) (b)   291,548 Total revenues   4,231,674   86,737   232,634   (9,060)     4,541,985                         Costs and expenses:                       Operating expenses   2,137,381   35,450   20,376   (5,523) (b,c)   2,187,684 Commission expenses   329,609   -   -   -     329,609 Cost of sales   214,059   -   -   -     214,059 Benefits and losses   -   18,558   160,954   -     179,512 Amortization of deferred policy acquisition costs   -   -   28,293   -     28,293 Lease expense   30,551   231   135   (2,447) (b)   28,470 Depreciation, net gains on disposals   609,930   -   -   -     609,930 Net losses on disposal of real estate   3,281   -   -   -     3,281 Total costs and expenses   3,324,811   54,239   209,758   (7,970)     3,580,838                         Earnings from operations before equity in earnings of subsidiaries   906,863   32,498   22,876   (1,090)     961,147                         Equity in earnings of subsidiaries   44,441   -   -   (44,441) (d)   -                         Earnings from operations   951,304   32,498   22,876   (45,531)     961,147 Other components of net periodic benefit costs	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Revenues:                       Self-moving equipment rentals $ 2,696,516 $ - $ - $ (4,103) (c) $ 2,692,413 Self-storage revenues   418,741   -   -   -     418,741 Self-moving & self-storage products & service sales   265,091   -   -   -     265,091 Property management fees   30,406   -   -   -     30,406 Life insurance premiums   -   -   127,976   -     127,976 Property and casualty insurance premiums   -   69,141   -   (3,088) (c)   66,053 Net investment and interest income   10,593   19,923   109,018   (1,705) (b)   137,829 Other revenue   236,419   -   4,470   (530) (b)   240,359 Total revenues   3,657,766   89,064   241,464   (9,426)     3,978,868                         Costs and expenses:                       Operating expenses   2,069,655   33,770   21,425   (7,702) (b,c)   2,117,148 Commission expenses   288,332   -   -   -     288,332 Cost of sales   164,018   -   -   -     164,018 Benefits and losses   -   12,410   162,426   -     174,836 Amortization of deferred policy acquisition costs   -   -   31,219   -     31,219 Lease expense   27,494   -   -   (612) (b)   26,882 Depreciation, net gains on disposals   637,063   -   -   -     637,063 Net gains on disposal of real estate   (758)   -   -   -     (758) Total costs and expenses   3,185,804   46,180   215,070   (8,314)     3,438,740                         Earnings from operations before equity in earnings of subsidiaries   471,962   42,884   26,394   (1,112)     540,128                         Equity in earnings of subsidiaries   55,789   -   -   (55,789) (d)   -                         Earnings from operations   527,751   42,884   26,394   (56,901)     540,128 Other components of net periodic benefit costs   (1,054)	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Revenues:                       Self-moving equipment rentals $ 2,656,327 $ - $ - $ (2,830) (c) $ 2,653,497 Self-storage revenues   367,276   -   -   -     367,276 Self-moving & self-storage products & service sales   264,146   -   -   -     264,146 Property management fees   29,148   -   -   -     29,148 Life insurance premiums   -   -   63,488   -     63,488 Property and casualty insurance premiums   -   63,488   -   (2,635) (c)   60,853 Net investment and interest income   13,857   12,349   86,395   (1,667) (b)   110,934 Other revenue   215,055   -   4,831   (521) (b)   219,365 Total revenues   3,545,809   75,837   154,714   (7,653)     3,768,707                         Costs and expenses:                       Operating expenses   1,938,317   34,218   14,613   (5,968) (b,c)   1,981,180 Commission expenses   288,408   -   -   -     288,408 Cost of sales   162,142   -   -   -     162,142 Benefits and losses   -   14,213   86,064   -     100,277 Amortization of deferred policy acquisition costs   -   -   28,556   -     28,556 Lease expense   33,702   -   -   (544) (b)   33,158 Depreciation, net gains on disposals   554,043   -   -   -     554,043 Net gains on disposal of real estate   (44)   -   -   -     (44) Total costs and expenses   2,976,568   48,431   129,233   (6,512)     3,147,720                         Earnings from operations before equity in earnings of subsidiaries   569,241   27,406   25,481   (1,141)     620,987                         Equity in earnings of subsidiaries   41,811   -   -   (41,811) (d)   -                         Earnings from operations   611,052   27,406   25,481   (42,952)     620,987 Other components of net periodic benefit costs   (1,013)
Consolidated Cash Flow Statement by Industry Segment	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (In thousands) Cash flows from operating activities:                       Net earnings $ 610,856 $ 25,720 $ 18,721 $ (44,441)   $ 610,856 Earnings from consolidated subsidiaries   (44,441)   -   -   44,441     - Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   664,001   -   -   -     664,001 Amortization of deferred policy acquisition costs   -   -   28,293   -     28,293 Amortization of premiums and accretion of discounts related to investments, net   -   1,578   12,651   -     14,229 Amortization of debt issuance costs   5,948   -   -   -     5,948 Interest credited to policyholders   -   -   55,321   -     55,321 Change in allowance for losses on trade receivables   1,424   (217)   (1)   -     1,206 Change in allowance for inventories and parts reserve   1,298   -   -   -     1,298 Net gains on disposal of personal property   (54,071)   -   -   -     (54,071) Net losses on disposal of real estate   3,281   -   -   -     3,281 Net gains on sales of investments   -   (158)   (9,900)   -     (10,058) Net gains on equity securities   -   (394)   -   -     (394) Deferred income taxes   72,407   459   (4,455)   -     68,411 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (60,806)   27,302   (6,012)   -     (39,516) Inventories and parts   (5,775)   -   -   -     (5,775) Prepaid expenses   94,359   -   -   -     94,359 Capitalization of deferred policy acquisition costs   -   -   (36,162)   -     (36,162) Other assets   29,879   537   (551)   -     29,865 Related party assets   (12,790)   303   -   12,000 (b)   (487) Accounts payable and accrued expenses   96,309   (3,497)   113   -     92,925 Policy benefits and losses, claims and loss expenses payable   14,919   (31,398)   14,487   -     (1,992) Other policyholders' funds and liabilities   -   (2,053)   4,283   -     2,230 Deferred income   10,959   -   608   -	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (In thousands) Cash flows from operating activities:                       Net earnings $ 442,048 $ 33,928 $ 21,861 $ (55,789)   $ 442,048 Earnings from consolidated subsidiaries   (55,789)   -   -   55,789     - Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   664,120   -   -   -     664,120 Amortization of deferred policy acquisition costs   -   -   31,219   -     31,219 Amortization of premiums and accretion of discounts related to investments, net   -   1,469   11,848   -     13,317 Amortization of debt issuance costs   4,426   -   -   -     4,426 Interest credited to policyholders   -   -   51,857   -     51,857 Change in allowance for losses on trade receivables   (14)   -   -   -     (14) Change in allowance for inventories and parts reserve   640   -   -   -     640 Net gains on disposal of personal property   (27,057)   -   -   -     (27,057) Net gains on disposal of real estate   (758)   -   -   -     (758) Net gains on sales of investments   -   (355)   (13,241)   -     (13,596) Net gains on equity securities   -   (3,783)   -   -     (3,783) Deferred income taxes   323,980   (2,847)   (3,240)   -     317,893 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   30,771   8,127   (769)   -     38,129 Inventories and parts   1,776   -   -   -     1,776 Prepaid expenses   (391,120)   -   -   -     (391,120) Capitalization of deferred policy acquisition costs   -   -   (24,447)   -     (24,447) Other assets   (3,099)   2,098   (294)   -     (1,295) Related party assets   (5,106)   (539)   -   -     (5,645) Accounts payable and accrued expenses   (4,428)   2,688   (2,790)   -     (4,530) Policy benefits and losses, claims and loss expenses payable   3,092   (19,618)   3,908   -     (12,618) Other policyholders' funds and liabilities   -   491   (5,348)   -     (4,857) Deferred income   (1,818)   -   -   -     (1,818) Related party liabilities	Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (In thousands) Cash flows from operating activities:                       Net earnings $ 370,857 $ 21,708 $ 20,103 $ (41,811)   $ 370,857 Earnings from consolidated subsidiaries   (41,811)   -   -   41,811     - Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   581,025   -   -   -     581,025 Amortization of deferred policy acquisition costs   -   -   28,556   -     28,556 Amortization of premiums and accretion of discounts related to investments, net   -   1,361   11,746   -     13,107 Amortization of debt issuance costs   3,923   -   -   -     3,923 Interest credited to policyholders   -   -   35,387   -     35,387 Change in allowance for losses on trade receivables   57   -   (5)   -     52 Change in allowance for inventories and parts reserve   (146)   -   -   -     (146) Net gains on disposal of personal property   (26,982)   -   -   -     (26,982) Net gains on disposal of real estate   (44)   -   -   -     (44) Net (gains) losses on sales of investments   -   (2,971)   308   -     (2,663) Net losses on equity securities   -   5,739   -   -     5,739 Deferred income taxes   112,434   830   (6,453)   -     106,811 Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (26,160)   (2,438)   (2,767)   -     (31,365) Inventories and parts   (13,492)   -   -   -     (13,492) Prepaid expenses   (8,620)   -   -   -     (8,620) Capitalization of deferred policy acquisition costs   -   -   (25,957)   -     (25,957) Other assets   159,126   (1,449)   (525)   -     157,152 Related party assets   3,857   339   (2)   -     4,194 Accounts payable and accrued expenses   6,454   257   3,552   -     10,263 Policy benefits and losses, claims and loss expenses payable   (159,793)   (4,400)   (71,927)   -     (236,120) Other policyholders' funds and liabilities   -   (117)   5,124   -     5,007 Deferred income   966   -   -   -     966

Revenue Recognition (Table Text

Revenue Recognition (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Lease schedule over next five years and thereafter	Year Ended March 31,     2022   2023   2024   2025   2026   Thereafter           (In thousands)                           Self-moving equipment rentals $ 4,740 $ - $ - $ - $ - $ - Property lease revenues   19,099   13,079   9,612   7,210   5,648   55,060 Total $ 23,839 $ 13,079 $ 9,612 $ 7,210 $ 5,648 $ 55,060
Disaggregation of revenue	Years Ended March 31,     2021   2020   2019           (In thousands)               Revenues recognized over time $ 182,278 $ 147,565 $ 2,814,732 Revenues recognized at a point in time   396,600   309,804   305,408 Total revenues recognized under ASC 606   578,878   457,369   3,120,140               Revenues recognized under ASC 842 or 840   3,644,798   3,182,902   406,070 Revenues recognized under ASC 944   195,371   200,768   131,563 Revenues recognized under ASC 320   122,938   137,829   110,934 Total revenues $ 4,541,985 $ 3,978,868 $ 3,768,707

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Table Text Block)	12 Months Ended
	Mar. 31, 2021
Allowance For Credit Loss [Abstract]
Accounts Receivable Allowance For Credit Loss [Table Text Block]	Allowance for Credit Losses     Trade Receivables   Investments, Fixed Maturities   Investments, other   Total                       (In thousands)     Balance as of March 31, 2020 $ 2,680 $ 503 $ 501 $ 3,684 Transition adjustment current expected credit losses   155   817   -   972 Write-offs against allowance   -   -   -   - Recoveries   -   -   -   - Balance as of March 31, 2021 $ 2,835 $ 1,320 $ 501 $ 4,656

Principles of Consolidation (Na

Principles of Consolidation (Narratives) (Details)	12 Months Ended
	Mar. 31, 2021
Disclosure of Entity's Reportable Segments [Abstract]
Number of reportable segments	3

Accounting Policies (Narratives

Accounting Policies (Narratives) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash, Insured and Uninsured [Abstract]
Cash, FDIC Insured Amount	$ 250,000
Cash, CDIC insured amount	$ 100,000
LIFO Method Related Items [Abstract]
Percentage of LIFO inventory	96.00%
Inventory, LIFO reserve	$ 21,832,000		$ 18,886,000
Effect of LIFO inventory liquidation on income	400,000
Disposition of Property, Plant and Equipment
Net amount of (gains) losses netted against depreciation expense	54,100,000		27,100,000		$ 27,000,000
Additional operating expenses	$ 21,200,000		27,700,000
Schedule of rental trucks depreciation:
Percentage reduction for year one, depreciation	16.00%
Percentage reduction for year two, depreciation	13.00%
Percentage reduction for year three, depreciation	11.00%
Percentage reduction for year four, depreciation	9.00%
Percentage reduction for year five, depreciation	8.00%
Percentage reduction for year six, depreciation	7.00%
Percentage reduction for year seven, depreciation	6.00%
Salvage value percentage under the old declining balance method	15.00%
Salvage value percentage	5.70%
Real Estate Companies Disclosures [Abstract]
Carrying value of surplus real estate	$ 68,800,000		69,600,000
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]
Self insurance reserve	427,100,000		410,100,000
Accrued insurance, noncurrent	17,500,000		15,700,000
Marketing and Advertising Expense [Abstract]
Advertising expense	18,000,000		13,700,000		10,600,000
Policyholder Benefits and Claims Incurred [Abstract]
Deferred sales inducements, net		$ 16,000,000		$ 16,800,000
Deferred sales inducements, amortization expense		$ 4,300,000		$ 5,500,000		$ 3,700,000
Adoption of New Accounting Pronounements
Other components of net periodic benefit cost	987,000		1,054,000		$ 1,013,000
Operating lease commitment, asset	877,038,000		$ 1,080,353,000
Operating lease commitment, liability	$ 92,510,000

Accounting Policies (Inventorie

Accounting Policies (Inventories, net) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Inventory, Net [Abstract]
Truck and trailer parts and accessories (a)	$ 95,976	$ 88,138
Hitches and towing components (b)	19,972	23,070
Moving supplies and propane (b)	12,877	11,824
Subtotal	128,825	123,032
Less: LIFO reserves	(21,832)	(18,886)
Less: excess and obsolete reserves	(1,416)	(3,063)
Total	$ 105,577	$ 101,083

Earnings Per Share (Narratives)

Earnings Per Share (Narratives) (Details)	12 Months Ended
	Mar. 31, 2019shares
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Employee stock ownership plan, unreleased shares	11,949

Reinsurance Recoverables and _3

Reinsurance Recoverables and Trade Receivables, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Reinsurance Recoverables and Trade Receivables, Net [Abstract]
Reinsurance recoverable	$ 66,386	$ 64,873	$ 89,020
Trade accounts receivable	121,251		59,394
Paid losses recoverable	276		624
Accrued investment income	27,883		25,744
Premiums and agents' balances	2,546		1,582
Independent dealer receivables	258		1,015
Other receivables	10,247		9,828
Reinsurance recoverables and trade receivables, gross	228,847		187,207
Less: Allowance for doubtful accounts	(4,421)		(535)
Reinsurance recoverables and trade receivables, net	$ 224,426		$ 186,672

Investments (Narratives) (Detai

Investments (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Assets held by insurance regulators				$ 27.7	$ 30.8
Fair value of sold available-for-sale securities	$ 523.9	$ 264.5	$ 114.8
Available-for-sale securities, gross realized gains	9.6	6.4	2
Available-for-sale securities, gross realized losses	$ 2.1	$ 0.2	0.2
Mortgages [Member] | Minimum [Member]
Real Estate [Abstract]
Mortgage loan interest rate	3.80%
Debt instrument, maturity year	2021
Available for sale investments, unrealized loss position
Available for sale investments, unrealized loss position	$ 0.4
Mortgages [Member] | Maximum [Member]
Real Estate [Abstract]
Mortgage loan interest rate	8.20%
Debt instrument, maturity year	2036
Available for sale investments, unrealized loss position
Available for sale investments, unrealized loss position			$ 0.5

Investments (Available-for-sale

Investments (Available-for-sale investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Available-for-sale securities, investments:
Amortized cost	$ 2,405,612	$ 2,334,215
Gross unrealized gains	250,254	135,767
Gross unrealized losses more than 12 months	(224)	(1,077)
Gross unrealized losses less than 12 months	(784)	(1,292)
Allowance for Expected Credit Losses	(1,319)
Estimated market value	2,653,539	2,467,613
U.S. treasury securities and government obligations [Member]
Available-for-sale securities, investments:
Amortized cost	92,429	112,421
Gross unrealized gains	12,941	7,959
Gross unrealized losses more than 12 months	0	(1)
Gross unrealized losses less than 12 months	0	0
Allowance for Expected Credit Losses	0
Estimated market value	105,370	120,379
U.S. government agency mortgage-backed securities [Member]
Available-for-sale securities, investments:
Amortized cost	61,427	88,449
Gross unrealized gains	911	759
Gross unrealized losses more than 12 months	(1)	(1)
Gross unrealized losses less than 12 months	(132)	(373)
Allowance for Expected Credit Losses	0
Estimated market value	62,205	88,834
Obligations of states and political subdivisions [Member]
Available-for-sale securities, investments:
Amortized cost	230,521	287,643
Gross unrealized gains	25,249	20,664
Gross unrealized losses more than 12 months	(59)	(155)
Gross unrealized losses less than 12 months	(3)	0
Allowance for Expected Credit Losses	0
Estimated market value	255,708	308,152
Corporate securities [Member]
Available-for-sale securities, investments:
Amortized cost	1,846,507	1,656,425
Gross unrealized gains	199,447	100,302
Gross unrealized losses more than 12 months	(163)	(919)
Gross unrealized losses less than 12 months	(641)	(812)
Allowance for Expected Credit Losses	(1,319)
Estimated market value	2,043,831	1,754,996
Mortgage-backed securities [Member]
Available-for-sale securities, investments:
Amortized cost	174,728	187,784
Gross unrealized gains	11,706	6,011
Gross unrealized losses more than 12 months	(1)	(1)
Gross unrealized losses less than 12 months	(8)	(107)
Allowance for Expected Credit Losses	0
Estimated market value	186,425	193,687
Redeemable Preferred Stocks [Member]
Available-for-sale securities, investments:
Amortized cost	$ 0	1,493
Gross unrealized gains		72
Gross unrealized losses more than 12 months		0
Gross unrealized losses less than 12 months		0
Estimated market value		$ 1,565

Investments (Adjusted cost and

Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Available-for-sale securities, amortized cost:
Amortized cost	$ 2,405,612	$ 2,334,215
Available-for-sale securities, fair value:
Estimated market value	2,653,539	2,467,613
Us Government Corporate Securities [Member]
Available-for-sale securities, amortized cost:
Due in one year or less	90,142	128,747
Due after one year through five years	562,442	547,821
Due after five years through ten years	672,733	636,036
Due after ten years	905,567	832,334
Amortized cost	2,230,884	2,144,938
Available-for-sale securities, fair value:
Due in one year or less	91,190	129,420
Due after one year through five years	601,818	566,934
Due after five years through ten years	754,536	678,636
Due after ten years	1,019,570	897,371
Estimated market value	2,467,114	2,272,361
Mortgage backed securities [Member]
Available-for-sale securities, amortized cost:
Amortized cost	174,728	187,784
Available-for-sale securities, fair value:
Estimated market value	186,425	193,687
Redeemable Preferred Stocks [Member]
Available-for-sale securities, amortized cost:
Amortized cost	0	1,493
Available-for-sale securities, fair value:
Estimated market value	$ 0	$ 1,565

Investments (Available for sale

Investments (Available for sale equity investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Marketable Securities [Abstract]
Amortized cost, equity investments	$ 29,809	$ 14,851
Estimated market value, equity investments	42,117	25,125
Common stocks [Member]
Marketable Securities [Abstract]
Amortized cost, equity investments	9,775	9,775
Estimated market value, equity investments	20,440	20,015
Non-redeemable preferred stocks [Member]
Marketable Securities [Abstract]
Amortized cost, equity investments	20,034	5,076
Estimated market value, equity investments	$ 21,677	$ 5,110

Investments (Carrying value of

Investments (Carrying value of other investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Investments [Abstract]
Mortgage loans, net	$ 391,230	$ 262,688
Short-term investments	7,234	6,995
Real estate	68,813	69,569
Policy loans	11,163	11,212
Other equity investments	11,319	9,909
Total investments	$ 489,759	$ 360,373

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Other Assets [Abstract]
Deposits (debt-related)	$ 33,952	$ 33,020
Cash surrender value of life insurance policies	567	31,371
Deposits (real estate related)	13,211	7,565
Other assets, total	$ 47,730	$ 71,956

Net Investment and Interest I_3

Net Investment and Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Net Investment Income [Line Items]
Investment income	$ 129,970	$ 142,683	$ 115,436
Less: investment expenses	(7,032)	(4,854)	(4,502)
Investment income, related party	0	0	0
Net investment and interest income	122,938	137,829	110,934
Fixed Maturities [Member]
Net Investment Income [Line Items]
Investment income	102,021	107,434	99,348
Real Estate [Member]
Net Investment Income [Line Items]
Investment income	5,769	7,304	5,538
Insurance policy loans [Member]
Net Investment Income [Line Items]
Investment income	829	974	1,305
Mortgage loans [Member]
Net Investment Income [Line Items]
Investment income	18,248	17,164	16,674
Short-term, amounts held by ceding reinsurers, net and other investments [Member]
Net Investment Income [Line Items]
Investment income	$ 3,103	$ 9,807	$ (7,429)

Borrowings (Narratives) (Detail

Borrowings (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt instruments, face, payment, and remaining balance amount:
Notes, loans and leases payable	$ 4,668,907	$ 4,621,291
Debt instruments, issuance and maturity dates:
Remaining Lease Term Finance Lease Weighted Average	3	4
Real estate loan (amortizing term) [Member] | Minimum [Member]
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2021
Real estate loan (amortizing term) [Member] | Maximum [Member]
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2036
Rental Truck (securitizations) [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.61%
Rental Truck (securitizations) [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.66%
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%
Capital Lease Obligations [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.22%
Finance Lease [Member] | Amerco [Member]
Debt instruments, face, payment, and remaining balance amount:
Capitalized assets, net book value	$ 865,600	$ 1,067,300
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%
Finance Lease [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.04%
Other Obligations [Member] | Amerco [Member]
Debt instruments, face, payment, and remaining balance amount:
Amounts held at LIBOR plus margin	$ 200,000
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.11%
Applicable margin interest rate	1.50%
Sum of LIBOR and margin, maximum rate	1.61%
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member]
Debt instruments, interest rate, effective percentage:
Debt Weighted Average Interest Rate	4.28%
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	2.80%
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	6.62%
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Real estate loans (revolving credit) [Member] | Amerco [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.11%
Debt instruments, face, payment, and remaining balance amount:
Line of credit facility, maximum borrowing capacity	$ 385,000
Notes, loans and leases payable	$ 385,000
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Real estate loans (revolving credit) [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, effective percentage:
Applicable margin interest rate	1.25%
Sum of LIBOR and margin, maximum rate	1.36%
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Real estate loans (revolving credit) [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, effective percentage:
Applicable margin interest rate	1.50%
Sum of LIBOR and margin, maximum rate	1.61%
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%
Debt instruments, face, payment, and remaining balance amount:
Line of credit facility, maximum borrowing capacity	$ 590,000
Notes, loans and leases payable	535,000
Amount held at fixed interest rate	$ 100,000
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | Minimum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.11%
Applicable margin interest rate	1.15%
Sum of LIBOR and margin, maximum rate	1.27%
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | Maximum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.12%
Applicable margin interest rate	1.25%
Sum of LIBOR and margin, maximum rate	1.36%
Amerco Real Estate Company [Member] | Working capital loans two [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.11%
Applicable margin interest rate	1.38%
Sum of LIBOR and margin, maximum rate	1.49%
Unused capacity fee	0.30%
Debt instruments, face, payment, and remaining balance amount:
Aggregate borrowing capacity, amount	$ 200,000
Line of credit facility, maximum borrowing capacity	300,000
Line of credit facility, remaining borrowing capacity	150,000
Amerco, Us Bank, National Association, Trustee [Member] | Amerco [Member]
Debt instruments, face, payment, and remaining balance amount:
Notes, loans and leases payable	88,600
Subsidiary holdings of parent company debt	$ 2,500
Amerco, Us Bank, National Association, Trustee [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.25%
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2021
Amerco, Us Bank, National Association, Trustee [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	8.00%
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2049
Life Insurance [Member] | FHLB [Member]
Federal Home Loan Bank, Advances, Activity for the year [Abstract]
Deposit amount			$ 70,500
Available for sale equity securities, noncurrent			153,700
Available for sale equity securities pledged as collateral			$ 78,800
Life Insurance [Member] | FHLB [Member] | Minimum [Member]
Federal Home Loan Bank, Advances, Activity for the year [Abstract]
Deposit interest rate			0.00%
Life Insurance [Member] | FHLB [Member] | Maximum [Member]
Federal Home Loan Bank, Advances, Activity for the year [Abstract]
Deposit interest rate			2.67%

Borrowings (Long-term debt borr

Borrowings (Long-term debt borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt instrument, maturities:
Notes, loans and finance/capital leases payable	$ 4,698,615	$ 4,651,068
Less: Debt issuance costs	(29,708)	(29,777)
Total notes, loans and finance/capital leases payable, net	$ 4,668,907	4,621,291
Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.61%
Debt instrument, maturities:
Debt instrument, maturity year range, end	2023
Notes, loans and finance/capital leases payable	$ 82,913	92,913
Real estate loan (amortizing term) [Member] | Minimum [Member]
Debt instrument, maturities:
Debt instrument, maturity year	2021
Real estate loan (amortizing term) [Member] | Maximum [Member]
Debt instrument, maturities:
Debt instrument, maturity year	2036
Senior mortgages [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2021
Debt instrument, maturity year range, end	2038
Notes, loans and finance/capital leases payable	$ 2,125,324	2,029,878
Senior mortgages [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.80%
Senior mortgages [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	6.62%
Real estate loans (revolving credit) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2023
Debt instrument, maturity year range, end	2025
Notes, loans and finance/capital leases payable	$ 535,000	519,000
Real estate loans (revolving credit) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.36%
Real estate loans (revolving credit) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.61%
Fleet loans (amortizing) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2022
Debt instrument, maturity year range, end	2028
Notes, loans and finance/capital leases payable	$ 176,295	224,089
Fleet loans (amortizing) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.61%
Fleet loans (amortizing) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.66%
Fleet loans (securitization) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2023
Debt instrument, maturity year range, end	2025
Notes, loans and finance/capital leases payable	$ 535,000	567,000
Fleet loans (securitization) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.27%
Fleet loans (securitization) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.36%
Fleet Loans (revolving credit) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2021
Debt instrument, maturity year range, end	2027
Notes, loans and finance/capital leases payable	$ 513,623	734,870
Fleet Loans (revolving credit) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.92%
Fleet Loans (revolving credit) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.04%
Capital leases (rental equipment) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2029
Notes, loans and finance/capital leases payable	$ 644,375	398,834
Capital leases (rental equipment) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.60%
Capital leases (rental equipment) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.22%
Other Obligations [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2021
Debt instrument, maturity year range, end	2049
Notes, loans and finance/capital leases payable	$ 86,085	$ 84,484
Other Obligations [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.25%
Other Obligations [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	8.00%

Borrowings (Annual maturities o

Borrowings (Annual maturities of Notes, Loans and Leases Payable) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Long-term debt, by Maturity:
2022	$ 465,884
2023	593,020
2024	1,018,407
2025	769,125
2026	352,162
Thereafter	1,500,017
Total	$ 4,698,615

Interest on Borrowings (Narrati

Interest on Borrowings (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Interest paid in cash including payments related to derivative contracts	$ 153.2	$ 168.1	$ 149.8

Interest on Borrowings (Compone

Interest on Borrowings (Components of interest expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Interest expense, borrowings:
Interest expense	$ 165,484	$ 180,444	$ 150,609
Capitalized interest	(11,573)	(23,517)	(12,733)
Amortization of transaction costs	5,949	4,427	3,745
Interest expense resulting rom derivatives	3,642	(404)	824
Total interest expense	$ 163,502	$ 160,950	$ 142,445

Interest on Borrowings (Interes

Interest on Borrowings (Interest Rates and Company Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Interest and debt expense:
Weighted average interest rate during the year	1.40%	3.31%	3.39%
Interest rate at year end	1.40%	2.86%	3.60%
Maximum amount outstanding during the year	$ 1,175,000	$ 1,086,000	$ 959,400
Average amount outstanding during the year	1,088,293	1,002,081	699,415
Facility fees	$ 261	$ 193	$ 374

Derivatives (Narratives) (Detai

Derivatives (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax	$ (429)	$ (6,301)	$ 451
Notional amount of operating lease	3,600
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months	3,900
Derivative hedge market value	6,600	5,900
Derivative Notional Amount	$ 282,700	$ 246,800

Derivatives (Interest rate cont

Derivatives (Interest rate contracts designated as hedging instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Interest Rate Fair Value Hedges [Abstract]
Assets	$ 0	$ 0
Liabilities	(5,141)	(8,214)
Notional amount (debt)	$ 235,000	$ 235,000

Derivatives (Effect of interest

Derivatives (Effect of interest rate contracts on statement of operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Effect of Interest rate Contracts [Abstract]
(Gain) recognized in AOCI on interest rate contracts (effective portion)	$ 3,071	$ (8,355)	$ 633
Gain reclassified from AOCI into income	$ (3,640)	$ 3	$ (35)

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	$ 34,652
Foreign currency translation	(5,694)	$ 9,377	$ (1,759)
Unrealized net loss on investments	76,969	97,943	(59,768)
Change in fair value of cash flow hedges	(429)	(6,301)	451
Amounts reclassified into earnings on hedging activities	2,746	(2)	26
Change in postretirement benfit obligations	(1,387)	333	(1,025)
Other comprehensive income (loss)	72,205	101,350	(62,075)
Balance as of March 31, 2021	106,857	34,652
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	(47,235)
Foreign currency translation	(5,694)
Unrealized net loss on investments	0
Change in fair value of cash flow hedges	0
Amounts reclassified into earnings on hedging activities	0
Change in postretirement benfit obligations	0
Other comprehensive income (loss)	(5,694)
Balance as of March 31, 2021	(52,929)	(47,235)
Unrealized Gain (Loss) on Investments
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	90,684
Foreign currency translation	0
Unrealized net loss on investments	76,969
Change in fair value of cash flow hedges	0
Amounts reclassified into earnings on hedging activities	0
Change in postretirement benfit obligations	0
Other comprehensive income (loss)	76,969
Balance as of March 31, 2021	167,653	90,684
Fair Market Value of Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	(6,196)
Foreign currency translation	0
Unrealized net loss on investments	0
Change in fair value of cash flow hedges	(429)
Amounts reclassified into earnings on hedging activities	2,746
Change in postretirement benfit obligations	0
Other comprehensive income (loss)	2,317
Balance as of March 31, 2021	(3,879)	(6,196)
Postretirement Benefit Obligation Gain (Loss)
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	(2,601)
Foreign currency translation	0
Unrealized net loss on investments	0
Change in fair value of cash flow hedges	0
Amounts reclassified into earnings on hedging activities	0
Change in postretirement benfit obligations	(1,387)
Other comprehensive income (loss)	(1,387)
Balance as of March 31, 2021	(3,988)	(2,601)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2020	34,652
Foreign currency translation	(5,694)	9,377	(1,759)
Unrealized net loss on investments	76,969
Change in fair value of cash flow hedges	(429)
Amounts reclassified into earnings on hedging activities	2,746	(2)	26
Change in postretirement benfit obligations	(1,387)	333	$ (1,025)
Other comprehensive income (loss)	72,205
Balance as of March 31, 2021	$ 106,857	$ 34,652

Stockholders' Equity (Narrative

Stockholders' Equity (Narratives) (Details)	12 Months Ended
	Mar. 31, 2021$ / shares
Dividends Declared
Dividends payable, date declared	Dec. 9, 2020
Dividend paid, amount per share	$ 2
Dividends payable, date of record	Dec. 21, 2020
Dividends payable, date to be paid	Dec. 30, 2020
Dividends declared two [Member]
Dividends Declared
Dividends payable, date declared	Aug. 20, 2020
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Sep. 7, 2020
Dividends payable, date to be paid	Sep. 21, 2020
Dividends declared three [Member]
Dividends Declared
Dividends payable, date declared	Dec. 4, 2019
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Dec. 19, 2019
Dividends payable, date to be paid	Jan. 6, 2020
Dividends declared four [Member]
Dividends Declared
Dividends payable, date declared	Aug. 22, 2019
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Sep. 9, 2019
Dividends payable, date to be paid	Sep. 23, 2019

Provision for Taxes (Narratives

Provision for Taxes (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Components of Deferred Tax Assets and Liabilities [Abstract]
NOL and credit carryforwards, federal amount	$ 146
NOL and credit carryfowards, state amount	384.9	$ 337.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized tax benefits, income tax penalties and interest accrued	14.3	$ 12.8
Unrecognized tax benefits, income tax penalties and interest expense	$ 1.5

Provision for Taxes (Earnings b

Provision for Taxes (Earnings before taxes and provision for taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Pretax earnings:
U.S.	$ 773,030	$ 372,687	$ 466,175
Non-U.S.	23,628	5,437	11,354
Total pretax earnings	796,658	378,124	477,529
Current provision (benefit)
Federal	100,521	(373,817)	(6,114)
State	16,572	(9,600)	3,420
Non-U.S.	3,404	949	1,375
Current provision (benefit), total	120,497	(382,468)	(1,319)
Deferred provision (benefit)
Federal	53,957	307,846	94,961
State	9,795	9,728	11,311
Non-U.S.	1,553	970	1,719
Deferred provision (benefit), total	65,305	318,544	107,991
Provision for income tax expense	185,802	(63,924)	106,672
Income taxes paid (net of income tax refunds)	$ 29,044	$ 6,859	$ 4,255

Provision for Taxes (Effective

Provision for Taxes (Effective income tax rate reconciliation) (Details)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%
Increase (Reduction) in Rate Resulting from [Abstract]
NOL tax rate benefit	0.00%	(38.62%)	0.00%
State taxes, net of federal benefit	2.53%	0.02%	2.41%
Foreign rate differential	0.00%	0.21%	0.15%
Federal tax credits	0.99%	0.53%	0.15%
Transition tax	0.00%	0.00%	(0.20%)
Tax exempt income	(0.08%)	(0.17%)	0.00%
Dividends received deduction	0.01%	0.01%	0.01%
Other	0.87%	1.19%	(0.86%)
Actual tax expense of operations	23.32%	(16.91%)	22.34%

Provision for Taxes (Significan

Provision for Taxes (Significant components of deferred tax assets and liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Net operating loss and credit carry forwards	$ 30,432	$ 25,973
Accrued expenses	109,740	105,171
Policy benefits and losses, claims and loss expenses payable, net	26,799	20,189
Operating leases, assets	19,370	22,353
Total deferred tax assets	186,341	173,686
Deferred tax liabilities:
Property, plant and equipment	1,280,703	1,198,198
Operating leases, liabilities	19,370	22,353
Deferred policy acquisition costs	13,696	12,795
Unrealized gains	48,667	29,873
Other	2,394	4,010
Total deferred tax liabilities	1,364,830	1,267,229
Net deferred tax liability	$ 1,178,489	$ 1,093,543

Provision for Taxes (Reconcilia

Provision for Taxes (Reconciliation of total amounts of unrecognized tax benefits roll forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits beginning balance	$ 29,632	$ 37,201
Revaluation based on change in after tax benefit	0	0
Additions based on tax positions related to the current year	1,479	42
Reductions for tax positions of prior years	(42)	(7,606)
Settlements	0	(5)
Unrecognized tax benefits ending balance	$ 31,069	$ 29,632

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narratives) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Compensation of related costs, Share-based Payments [Abstract]
Employee stock ownership plan (ESOP), compensation expense	$ 23,000,000	$ 10,300,000	$ 11,300,000
Employee stock ownership plan (ESOP), cash contributions to ESOP	5,600,000	1,000,000
Cash contributions to ESOP non leveraged	23,000,000	$ 4,000,000	$ 5,200,000
Unallocated common stock dividend, debt repayment	$ 0
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined benefit plan, health care cost trend rate assumed for next fiscal year	5.00%	6.90%
Defined benefit plan, ultimate health care cost trend rate	4.00%	4.50%
Post retirement health insurance [Member]
Deferred Compensation Arrangements [Abstract]
Lifetime maximum benefit paid per individual	$ 20,000
Post retirement life insurance [Member]
Deferred Compensation Arrangements [Abstract]
Lifetime maximum benefit paid per individual	3,000
Additional benefit requirement amount	$ 100

Employee Benefit Plans (Summary

Employee Benefit Plans (Summary of Financing Arrangements for Leveraged ESOP Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Issued June, 1991 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	$ 0
Employee stock ownership plan (ESOP), interest payments	0	$ 0	$ 1
Issued July, 2009 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	0
Employee stock ownership plan (ESOP), interest payments	0	9	17
Issued February, 2016 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	0
Employee stock ownership plan (ESOP), interest payments	$ 0	$ 229	$ 190

Employee Benefit Plans (Shares

Employee Benefit Plans (Shares Held by the ESOP Plan) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated shares	951	1,003
Unreleased shares	0	0
Fair value of unreleased shares	$ 0	$ 0
Unreleased shares non-leveraged	0	0
Fair value of unreleased shares non-leveraged	$ 0	$ 0

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of net periodic post retirement benefit cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 1,267	$ 1,055	$ 1,108
Interest cost on accumulated postretirement benefit	919	964	943
Other components	68	90	70
Total other components of net periodic benefit costs	987	1,054	1,013
Net periodic postretirement benefit cost	$ 2,254	$ 2,109	$ 2,121

Employee Benefit Plans (Compo_2

Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning of year	$ 27,503	$ 25,817
Service cost for benefits earned during the period	1,267	1,055	$ 1,108
Interest cost on accumulated post retirement benefit	919	964	943
Net benefit payments and expense	(841)	(93)
Actuarial loss	1,907	(240)
Accumulated postretirement benefit obligation	30,755	27,503	$ 25,817
Liabilities:
Current liabilities	1,334	1,151
Non-currrent liabilities	29,421	26,352
Total post retirement benefit liability recognized in statement of financial position	30,755	27,503
Components included in accumulated other comprehensive income (loss):
Unrecognized net loss	(5,286)	(3,447)
Cumulative net periodic benefit cost (in excess of employer contribution)	$ 25,469	$ 24,056

Employee Benefit Plans (Discoun

Employee Benefit Plans (Discount Rate Assumptions in Computation of Accumulated Postretirement Benefit Obligation) (Details)	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Accumulated postretirement benefit obligation	2.93%	3.37%	3.83%

Employee Benefit Plans (Future

Employee Benefit Plans (Future Net Benefit Payments Expected for Post Employee Benefit Obligations) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2022	$ 1,334
2023	1,520
2024	1,719
2025	1,937
2026	2,167
2027 through 2030	12,529
Total	$ 21,206

Fair Value Measurements (Narrat

Fair Value Measurements (Narratives) (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)
Fair Value Disclosures [Abstract]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales	$ 0.2

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Assets
Reinsurance recoverables and trade receivables, net	$ 224,426	$ 186,672
Mortgage loans, net	391,230	262,688
Other investments	98,529	97,685
Total	714,185	547,045
Liabilities
Notes, loans and leases payable, gross	4,449,691	4,342,308
Total	4,449,691	4,342,308
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	4,698,615	4,651,068
Total	4,698,615	4,651,068
Level 3 [Member]
Assets
Reinsurance recoverables and trade receivables, net	224,426	186,672
Mortgage loans, net	391,230	262,688
Other investments	98,529	97,685
Total	714,185	547,045
Liabilities
Notes, loans and leases payable, gross	0	0
Total	0	0
Carrying Value [Member]
Assets
Reinsurance recoverables and trade receivables, net	224,426	186,672
Mortgage loans, net	391,230	262,688
Other investments	98,529	97,685
Total	714,185	547,045
Liabilities
Notes, loans and leases payable, gross	4,698,615	4,651,068
Total	$ 4,698,615	$ 4,651,068

Fair Value Measurements (Financ

Fair Value Measurements (Financial Instruments Level within the Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Assets:
Short-term investments	$ 839,250	$ 369,279
Fixed maturities - available for sale	2,653,539	2,466,048
Preferred stock	21,677	6,675
Common stock	20,440	20,015
Derivatives	6,601	5,944
Total	3,541,507	2,867,961
Liabilities:
Derivatives	5,141	8,214
Total	5,141	8,214
Level 1 [Member]
Assets:
Short-term investments	839,250	368,968
Fixed maturities - available for sale	6,967	7,156
Preferred stock	21,677	6,675
Common stock	20,440	20,015
Derivatives	6,601	5,944
Total	894,935	408,758
Liabilities:
Derivatives	0	0
Total	0	0
Level 2 [Member]
Assets:
Short-term investments	0	311
Fixed maturities - available for sale	2,646,415	2,458,731
Preferred stock	0	0
Common stock	0	0
Derivatives	0	0
Total	2,646,415	2,459,042
Liabilities:
Derivatives	5,141	8,214
Total	5,141	8,214
Level 3 [Member]
Assets:
Short-term investments	0	0
Fixed maturities - available for sale	157	161
Preferred stock	0	0
Common stock	0	0
Derivatives	0	0
Total	157	161
Liabilities:
Derivatives	0	0
Total	$ 0	$ 0

Reinsurance and Policy Benefi_3

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Narratives) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Reinsurance Disclosures [Abstract]
Maximum amount of life insurance retained on any one life	$ 150,000
Letters of credit held at year end from re-insurers		$ 100,000
Letters of credit issued at year end		1,500,000
Reinsurance recoverable, gross		64,900,000
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease)		$ 31,200,000

Reinsurance and Policy Benefi_4

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Year ended December 31,
Direct amount (a) - Life insurance in force	$ 1,031,634	$ 957,280	$ 941,822
Ceded to other companies - Life insurance in force	73	7	207
Assumed from other companies - Life insurance in force	356,266	441,563	548,152
Net amount (a) - Life insurance in force	$ 1,387,827	$ 1,398,836	$ 1,489,767
Percentage of amount assumed to net - Life insurance in force	26.00%	32.00%	37.00%
Direct amount (a)	$ 185,635	$ 189,343	$ 191,573
Ceded to Other Companies	212	227	266
Assumed from Other Companies	6,471	8,001	(66,971)
Net amount (a)	191,894	197,117	124,336
Premiums earned: Life [Member]
Year ended December 31,
Direct amount (a)	58,048	53,289	51,691
Ceded to Other Companies	1	1	(1)
Assumed from Other Companies	5,049	5,629	(69,616)
Net amount (a)	$ 63,096	$ 58,917	$ (17,924)
Percentage of amount assumed to net	8.00%	10.00%	388.00%
Premiums earned: Accident and health [Member]
Year ended December 31,
Direct amount (a)	$ 57,081	$ 66,863	$ 77,813
Ceded to Other Companies	211	226	267
Assumed from Other Companies	1,388	1,563	1,851
Net amount (a)	$ 58,258	$ 68,200	$ 79,397
Percentage of amount assumed to net	2.00%	2.00%	2.00%
Premiums earned: Annuity [Member]
Year ended December 31,
Direct amount (a)	$ 221	$ 65	$ 1,221
Ceded to Other Companies	0	0	0
Assumed from Other Companies	34	794	794
Net amount (a)	$ 255	$ 859	$ 2,015
Percentage of amount assumed to net	13.00%	92.00%	39.00%
Premiums earned: Property and casualty [Member]
Year ended December 31,
Direct amount (a)	$ 70,285	$ 69,126	$ 60,848
Ceded to Other Companies	0	0	0
Assumed from Other Companies	0	15	0
Net amount (a)	$ 70,285	$ 69,141	$ 60,848
Percentage of amount assumed to net	0.00%	0.00%	0.00%

Reinsurance and Policy Benefi_5

Reinsurance and Policy Benefits and Losses Claims and Loss Expenses Payable (Policy Benefits and Losses, Claims and Loss Expenses Payable for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reinsurance:
Unpaid losses and loss adjustment expense		$ 177,963
Total	$ 997,701		$ 997,647
Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		177,963		$ 209,127	$ 228,970	$ 233,554
Operating Segments [Member] | Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		177,963		209,127
Reinsurance losses payable		979		1,214
Total	$ 178,942	$ 178,942	$ 210,341	$ 210,341

Reinsurance and Policy Benefi_6

Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Activity in the Liability for Unpaid Losses and Loss Adjustment Expenses for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Paid related to:
Net balance at December 31	$ 113,090
Plus: reinsurance recoverables	64,873
Balance at December 31	177,963
Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	209,127	$ 228,970	$ 233,554
Less: reinsurance recoverables	87,083	94,920	94,490
Net balance at January 1	122,044	134,050	139,064
Incurred related to:
Current year	20,670	22,137	19,579
Prior years	(3,865)	(9,535)	(5,365)
Total incurred	16,805	12,602	14,214
Paid related to:
Current year	7,664	7,366	8,838
Prior years	18,095	17,242	10,390
Total paid	25,759	24,608	19,228
Net balance at December 31	113,090	122,044	134,050
Plus: reinsurance recoverables	64,873	87,083	94,920
Balance at December 31	177,963	209,127	$ 228,970
Operating Segments [Member] | Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	209,127
Paid related to:
Balance at December 31	$ 177,963	$ 209,127

Reinsurance and Policy Benefi_7

Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 16,285
Shortduration Insurance Contracts Number Of Reported Claims	11,199
Accident Year 2014 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 10,327	$ 10,493	$ 10,748	$ 10,759	$ 10,720	$ 10,907	$ 11,691
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	10,068
Accident Year 2015 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 11,092	11,087	12,464	12,460	12,459	$ 12,214
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	11,104
Accident Year 2016 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 11,764	11,790	13,056	13,011	$ 13,297
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	11,469
Accident Year 2017 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 15,538	17,078	16,109	$ 15,748
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 305
Shortduration Insurance Contracts Number Of Reported Claims	12,100
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 18,027	18,386	$ 19,580
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 1,464
Shortduration Insurance Contracts Number Of Reported Claims	11,981
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 26,316	$ 22,138
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 4,379
Shortduration Insurance Contracts Number Of Reported Claims	11,738
Accident Year 2020 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 20,671

Reinsurance And Policy Benefi_8

Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Cumulative Paid Claims And Allocated Claim Adjustment Expense Net Of Reinsurance) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	$ 85,747
All outstanding liabilities before 2012, net of reinsurance	85,101
Liabilities for claims and claim adjustment expenses, net of reinsurance	113,090
Accident Year 2014 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	10,327	$ 10,327	$ 10,325	$ 9,293	$ 9,270	$ 8,087	$ 6,154
Accident Year 2015 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	11,092	11,087	10,343	9,730	9,601	$ 7,509
Accident Year 2016 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	11,764	11,746	11,643	10,665	$ 7,777
Accident Year 2017 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	15,012	14,825	11,638	$ 8,970
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	15,150	12,698	$ 8,838
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	14,737	$ 7,366
Accident Year 2020 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	$ 7,665

Reinsurance And Policy Benefi_9

Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Total Gross Liability For Unpaid Property And Casualty Claims And Claim Adjustment Expense) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net [Abstract]
Liabilities for unpaid property and casualty claims and claim adjustment expenses, net of reinsurance		$ 113,090
Total reinsurance recoverable on unpaid property and casualty claims	$ 66,386	64,873	$ 89,020
Total gross liability for unpaid Property and Casualty claims and claim adjustment expense		$ 177,963

Reinsurance And Policy Benef_10

Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Average Annual Percentage Payout Of Incurred Claims By Age Net Of Reinsurance) (Details) - Property and Casualty Insurance [Member]	Dec. 31, 2020
Average annual Percentage Payout [Abstract]
Year 1	52.20%
Year 2	21.40%
Year 3	11.00%
Year 4	2.00%
Year 5	5.60%
Year 6	0.00%
Year 7	0.00%

Leases (Narratives) (Details)

Leases (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Right Of Use Asset Obtained In Exchange For Operating Lease Liability	$ 105.4
Right Of Use Asset Obtained In Exchange For Finance Lease Liability	948.2
Operating Cash Flows For Financing Leases	513.6	$ 734.9
Cash paid for finance leases	29.3	25.9
Cash paid for operating leases	$ 92.5	$ 106.4

Leases (Components Right Of Use

Leases (Components Right Of Use Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Finance Lease [Abstract]
Building and Improvements	$ 132,901	$ 125,547
Furniture and equipment	22,316	21,113
Rental trailers and rental equipment	203,594	219,581
Rental trucks	1,494,098	1,634,572
Right Of Use Assets Gross	1,852,909	2,000,813
less: accumulated depreciation	(883,366)	(813,829)
Right of use assets, net	969,543	1,186,984
Finance Lease [Member]
Finance Lease [Abstract]
Building and Improvements	0	0
Furniture and equipment	22,316	21,113
Rental trailers and rental equipment	203,594	219,581
Rental trucks	1,494,098	1,634,572
Right Of Use Assets Gross	1,720,008	1,875,266
less: accumulated depreciation	(842,970)	(794,913)
Right of use assets, net	877,038	1,080,353
Operating Lease [Member]
Finance Lease [Abstract]
Building and Improvements	132,901	125,547
Furniture and equipment	0	0
Rental trailers and rental equipment	0	0
Rental trucks	0	0
Right Of Use Assets Gross	132,901	125,547
less: accumulated depreciation	(40,396)	(18,916)
Right of use assets, net	$ 92,505	$ 106,631

Leases (Finance Leases Weighted

Leases (Finance Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Finance Leases Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Remaining Lease Term Finance Lease Weighted Average	3	4
Finance Lease Weighted Average Discount Rate Percent	3.60%	3.50%

Leases (Operating Leases Weight

Leases (Operating Leases Weighted Average Remaining Lease Term and Discount Rate) (Details)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Leases Remaining Lease Term And Weighted Average Discount Rate [Abstract]
Remaining Lease Term Operating Lease Weighted Average	14.7	14
Operating Lease Weighted Average Discount Rate Percent	4.60%	4.60%

Leases (Components Of Lease Exp

Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lease Cost [Abstract]
Operating Lease cost	$ 30,551	$ 27,494
Finance Lease Cost [Abstract]
Finance Lease Right Of Use Asset Amortization	150,994	186,860
Finance Lease Interest Expense	22,405	30,901
Sum of finance lease cost	$ 173,399	$ 217,761

Leases (Maturities Of Lease Lia

Leases (Maturities Of Lease Liabilities) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Finance Lease Liabilities Payments Due [Abstract]
2022	$ 179,470
2023	134,783
2024	112,732
2025	78,910
2026	47,453
Thereafter	7
Total lease payments	553,355
Less: imputed interest	(39,732)
Finance Lease Liability	513,623
Operating Lease Liabilities Payments Due [Abstract]
2022	24,288
2023	22,239
2024	21,257
2025	10,151
2026	4,006
Thereafter	62,175
Total lease payments	144,116
Less: imputed interest	(51,606)
Operating Lease Liability	$ 92,510

Contingencies (Narratives) (Det

Contingencies (Narratives) (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)
Covid 19 Pandemic
Unusual Or Infrequent Item Net Gain Loss [Abstract]
CARES act, refund estimate	$ 366

Related Party Transactions (Nar

Related Party Transactions (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Mar. 31, 2019
Sac Holdings [Member]
Related party costs and expenses:
Payments to aquire assets, other	$ 0.4
Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member]
Property Management Fee [Abstract]
Management fees received exclusive of reimbursed expenses	31.2		$ 29	$ 30
Related party costs and expenses:
Revenue, excluding dealer agreement commissions and expenses	25.5
Expenses, related parties	2.6
Cash flow, related party	22.6
Revenue, generated by the dealer agreement from related parties	323.8
Commission expenses, generated from dealer agreement with related parties	$ 69.2
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%
Amerco, Uhaul Intl [Member]
Related party notes receivable:
Notes receivable, related party		$ 12
Debt Instrument, Interest Rate, Stated Percentage [Abstract]
Debt instrument, interest rate, stated percentage		4.00%
Surplus note, payment term		seven years

Related Party Transactions (Rel

Related Party Transactions (Related Party Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Related party transactions:
Management fees revenue	$ 31,603	$ 30,406	$ 29,148
Revenue from related parties	31,603	30,406	29,148
Blackwater [Member]
Related party transactions:
Management fees revenue	25,512	24,014	23,986
Mercury [Member]
Related party transactions:
Management fees revenue	$ 6,091	$ 6,392	$ 5,162

Related Party Transactions (R_2

Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Related Party Cost and Expense [Abstract]
Related party expenses, total	$ 71,824	$ 64,697	$ 64,112
Blackwater [Member]
Related Party Cost and Expense [Abstract]
U-Haul lease expenses	2,612	2,631	2,678
U-Haul commission expenses	$ 69,212	$ 62,066	$ 61,434

Related Party Transactions (R_3

Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Related party assets:
U-Haul receivables	$ 10,247	$ 9,828
Related party assets	35,395	34,784
Blackwater [Member]
Related party assets:
Notes receivable	27,116	25,293
Mercury [Member]
Related party assets:
Notes receivable	9,632	9,893
Insurance Subsidiaries [Member]
Related party assets:
Other	$ (1,353)	$ (402)

Statutory Financial Informati_3

Statutory Financial Information of Insurance Subsidiaries (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Property and Casualty Insurance [Member] | Repwest [Member]
Statutory financial information of insurance subsidiaries:
Statutory accounting practices, statutory amount available for dividend payments			$ 22.7
Dividend payments restrictions schedule, amounts paid	$ 22.6	$ 21.6
Restricted net assets, subsidiaries			105.4	$ 98.5
Life Insurance [Member] | Oxford [Member]
Statutory financial information of insurance subsidiaries:
Statutory accounting practices, statutory amount available for dividend payments			$ 6.3

Statutory Financial Informati_4

Statutory Financial Information of Insurance Subsidiaries (Net income (loss) Capital and Surplus (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Repwest [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	$ 22,898	$ 28,614	$ 23,960
Audited statutory capital and surplus	227,380	226,999	216,763
ARCOA [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	2,438	2,906	1,612
Audited statutory capital and surplus	15,928	12,851	9,390
Oxford [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	6,296	18,599	11,367
Audited statutory capital and surplus	218,301	223,264	203,723
CFLIC [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	8,082	8,043	8,735
Audited statutory capital and surplus	25,980	26,305	27,232
NAI [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	2,127	1,942	1,436
Audited statutory capital and surplus	$ 13,980	$ 13,371	$ 12,817

Financial Information by Geog_3

Financial Information by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Fiscal year ended:
Total revenues	$ 4,541,985	$ 3,978,868	$ 3,768,707
Depreciation and amortization, net of (gains) losses on disposals	641,504	667,524	582,555
Interest expense	163,502	160,950	142,445
Pretax earnings	796,658	378,124	477,529
Income tax expense	185,802	(63,924)	106,672
Identifiable assets	14,651,606	13,438,024	11,891,713
United States [Member]
Fiscal year ended:
Total revenues	4,334,083	3,797,849	3,597,285
Depreciation and amortization, net of (gains) losses on disposals	631,344	652,110	575,134
Interest expense	160,429	157,595	139,573
Pretax earnings	773,030	372,687	466,175
Income tax expense	180,845	(65,842)	103,578
Identifiable assets	14,212,978	13,016,942	11,526,876
Canada [Member]
Fiscal year ended:
Total revenues	207,902	181,019	171,422
Depreciation and amortization, net of (gains) losses on disposals	10,160	15,414	7,421
Interest expense	3,073	3,355	2,872
Pretax earnings	23,628	5,437	11,354
Income tax expense	4,957	1,918	3,094
Identifiable assets	$ 438,628	$ 421,082	$ 364,837

Consolidating financial infor_3

Consolidating financial information by industry segment (Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Mar. 31, 2018
ASSETS:
Cash and cash equivalents	$ 1,194,012		$ 494,352		$ 673,701	$ 759,388
Reinsurance recoverables and trade receivables, net	224,426		186,672
Inventories, net	105,577		101,083
Prepaid expenses	469,144		562,904
Investments, fixed maturities and marketable equities	2,695,656		2,492,738
Investments, other	489,759		360,373
Deferred policy acquisition costs, net	89,749		103,118
Other assets	47,730		71,956
Right of use assets, financing, net	877,038		1,080,353
Right of use assets, operating	92,505		106,631
Related party assets	35,395		34,784
Subtotal assets	6,320,991		5,594,964
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	1,075,813		1,032,945
Buildings and improvements	5,163,705		4,663,461
Furniture and equipment	786,505		752,363
Property, plant and equipment (gross)	11,413,668		10,556,222
Less: Accumulated depreciation	(3,083,053)		(2,713,162)
Total property, plant and equipment	8,330,615		7,843,060
Total assets	14,651,606		13,438,024		11,891,713
Liabilities:
Accounts payable and accrued expenses	645,575		554,353
Notes, loans and leases payable	4,668,907		4,621,291
Operating lease liabilities	92,510		106,443
Policy benefits and losses, claims and loss expenses payable	997,701		997,647
Liabilities from investment contracts	2,161,530		1,802,217
Other policyholders' funds and liabilities	12,420		10,190
Deferred income	42,592		31,620
Deferred income taxes	1,178,489		1,093,543
Related party liabilities	0		0
Total liabilities	9,799,724		9,217,304
Stockholders' equity:
Additional paid-in capital	453,819		453,819
Accumulated other comprehensive loss	106,857		34,652
Retained earnings	4,958,359		4,399,402
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	4,851,882		4,220,720
Total liabilities and stockholders' equity	14,651,606		13,438,024
Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	477,921		511,520
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	3,909,724		3,595,933
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497		10,497
Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)		(525,653)
Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)		(151,997)
Operating Segments [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	1,010,275		459,078		643,918	702,036
Reinsurance recoverables and trade receivables, net	118,741		60,073
Inventories, net	105,577		101,083
Prepaid expenses	469,144		562,904
Investments, fixed maturities and marketable equities	0		0
Investments, other	20,733		20,988
Deferred policy acquisition costs, net	0		0
Other assets	44,763		69,128
Right of use assets, financing, net	877,038		1,080,353
Right of use assets, operating	92,245		106,631
Related party assets	54,042		41,027
Subtotal assets	2,792,558		2,501,265
Investments in subsidiaries	741,860		668,498
Property, plant and equipment, at cost:
Land	1,075,813		1,032,945
Buildings and improvements	5,163,705		4,663,461
Furniture and equipment	786,505		752,363
Property, plant and equipment (gross)	11,413,668		10,556,222
Less: Accumulated depreciation	(3,083,053)		(2,713,162)
Total property, plant and equipment	8,330,615		7,843,060
Total assets	11,865,033		11,012,823
Liabilities:
Accounts payable and accrued expenses	636,257		545,685
Notes, loans and leases payable	4,657,720		4,609,844
Operating lease liabilities	92,236		106,443
Policy benefits and losses, claims and loss expenses payable	427,073		410,107
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	42,592		31,620
Deferred income taxes	1,136,149		1,063,681
Related party liabilities	25,413		24,275
Total liabilities	7,017,440		6,791,655
Stockholders' equity:
Additional paid-in capital	454,029		454,029
Accumulated other comprehensive loss	102,568		35,100
Retained earnings	4,958,149		4,399,192
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	4,847,593		4,221,168
Total liabilities and stockholders' equity	11,865,033		11,012,823
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	477,921		511,520
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	3,909,724		3,595,933
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497		10,497
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)		(525,653)
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)		(151,997)
Operating Segments [Member] | Property and Casualty Insurance [Member]
ASSETS:
Cash and cash equivalents	5,658		4,794		5,757	6,639
Reinsurance recoverables and trade receivables, net	67,069		93,995
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	295,753		288,998
Investments, other	90,412		90,145
Deferred policy acquisition costs, net	0		0
Other assets	436		680
Right of use assets, financing, net	0		0
Right of use assets, operating	92		0
Related party assets	6,854		7,137
Subtotal assets	466,274		485,749
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	466,274		485,749
Liabilities:
Accounts payable and accrued expenses	2,029		5,530
Notes, loans and leases payable	0		0
Operating lease liabilities	96		0
Policy benefits and losses, claims and loss expenses payable	178,942	$ 178,942	210,341	$ 210,341
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	3,698		5,751
Deferred income	0		0
Deferred income taxes	13,046		8,447
Related party liabilities	5,821		4,616
Total liabilities	203,632		234,685
Stockholders' equity:
Additional paid-in capital	91,120		91,120
Accumulated other comprehensive loss	22,546		12,581
Retained earnings	145,675		144,062
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	262,642		251,064
Total liabilities and stockholders' equity	466,274		485,749
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	3,301		3,301
Operating Segments [Member] | Property and Casualty Insurance [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Property and Casualty Insurance [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Life Insurance [Member]
ASSETS:
Cash and cash equivalents	178,079		30,480		24,026	50,713
Reinsurance recoverables and trade receivables, net	38,616		32,604
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	2,399,903		2,203,740
Investments, other	378,614		249,240
Deferred policy acquisition costs, net	89,749		103,118
Other assets	2,531		2,148
Right of use assets, financing, net	0		0
Right of use assets, operating	168		0
Related party assets	13,850		18,629
Subtotal assets	3,101,510		2,639,959
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	3,101,510		2,639,959
Liabilities:
Accounts payable and accrued expenses	7,289		3,138
Notes, loans and leases payable	11,187		11,447
Operating lease liabilities	178		0
Policy benefits and losses, claims and loss expenses payable	391,686		377,199
Liabilities from investment contracts	2,161,530		1,802,217
Other policyholders' funds and liabilities	8,722		4,439
Deferred income	0		0
Deferred income taxes	29,294		21,415
Related party liabilities	12,406		2,670
Total liabilities	2,622,292		2,222,525
Stockholders' equity:
Additional paid-in capital	26,271		26,271
Accumulated other comprehensive loss	140,817		78,550
Retained earnings	309,630		310,113
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	479,218		417,434
Total liabilities and stockholders' equity	3,101,510		2,639,959
Operating Segments [Member] | Life Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Life Insurance [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Life Insurance [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Life Insurance [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Life Insurance [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Life Insurance [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	2,500		2,500
Operating Segments [Member] | Life Insurance [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Life Insurance [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Eliminations [Member]
ASSETS:
Cash and cash equivalents	0		0		$ 0	$ 0
Reinsurance recoverables and trade receivables, net	0		0
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	0		0
Investments, other	0		0
Deferred policy acquisition costs, net	0		0
Other assets	0		0
Right of use assets, financing, net	0		0
Right of use assets, operating	0		0
Related party assets	(39,351)		(32,009)
Subtotal assets	(39,351)		(32,009)
Investments in subsidiaries	(741,860)		(668,498)
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	(781,211)		(700,507)
Liabilities:
Accounts payable and accrued expenses	0		0
Notes, loans and leases payable	0		0
Operating lease liabilities	0		0
Policy benefits and losses, claims and loss expenses payable	0		0
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	0		0
Deferred income taxes	0		0
Related party liabilities	(43,640)		(31,561)
Total liabilities	(43,640)		(31,561)
Stockholders' equity:
Additional paid-in capital	(117,601)		(117,601)
Accumulated other comprehensive loss	(159,074)		(91,579)
Retained earnings	(455,095)		(453,965)
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	(737,571)		(668,946)
Total liabilities and stockholders' equity	(781,211)		(700,507)
Eliminations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Eliminations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Eliminations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Eliminations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Eliminations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Eliminations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	(5,801)		(5,801)
Eliminations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Eliminations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	$ 0		$ 0

Consolidating financial infor_4

Consolidating financial information by industry segment (Statement of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Self-moving equipment rentals	$ 3,083,317	$ 2,692,413	$ 2,653,497
Self-storage revenues	477,262	418,741	367,276
Self-moving and self-storage products and service sales	344,929	265,091	264,146
Property management fees	31,603	30,406	29,148
Life insurance premiums	121,609	127,976	63,488
Property and casualty insurance premiums	68,779	66,053	60,853
Net investment and interest income	122,938	137,829	110,934
Other revenue	291,548	240,359	219,365
Total revenues	4,541,985	3,978,868	3,768,707
Costs and expenses:
Operating expenses	2,187,684	2,117,148	1,981,180
Commission expenses	329,609	288,332	288,408
Cost of sales	214,059	164,018	162,142
Benefits and losses	179,512	174,836	100,277
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Lease expense	28,470	26,882	33,158
Depreciation, net of (gains) losses on disposals	609,930	637,063	554,043
Net gains on disposal of real estate	3,281	(758)	(44)
Total costs and expenses	3,580,838	3,438,740	3,147,720
Earnings from operations before equity in earnings of subsidiaries	961,147	540,128	620,987
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	961,147	540,128	620,987
Other components of net periodic benefit costs	(987)	(1,054)	(1,013)
Interest expense	(163,502)	(160,950)	(142,445)
Pretax earnings	796,658	378,124	477,529
Income tax expense	(185,802)	63,924	(106,672)
Earnings available to common shareholders	610,856	442,048	370,857
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Revenues:
Self-moving equipment rentals	3,086,824	2,696,516	2,656,327
Self-storage revenues	477,262	418,741	367,276
Self-moving and self-storage products and service sales	344,929	265,091	264,146
Property management fees	31,603	30,406	29,148
Life insurance premiums	0	0	0
Property and casualty insurance premiums	0	0	0
Net investment and interest income	2,259	10,593	13,857
Other revenue	288,797	236,419	215,055
Total revenues	4,231,674	3,657,766	3,545,809
Costs and expenses:
Operating expenses	2,137,381	2,069,655	1,938,317
Commission expenses	329,609	288,332	288,408
Cost of sales	214,059	164,018	162,142
Benefits and losses	0	0	0
Amortization of deferred policy acquisition costs	0	0	0
Lease expense	30,551	27,494	33,702
Depreciation, net of (gains) losses on disposals	609,930	637,063	554,043
Net gains on disposal of real estate	3,281	(758)	(44)
Total costs and expenses	3,324,811	3,185,804	2,976,568
Earnings from operations before equity in earnings of subsidiaries	906,863	471,962	569,241
Equity in earnings of subsidiaries	44,441	55,789	41,811
Earnings from operations	951,304	527,751	611,052
Other components of net periodic benefit costs	(987)	(1,054)	(1,013)
Interest expense	(164,592)	(162,062)	(143,586)
Pretax earnings	785,725	364,635	466,453
Income tax expense	(174,869)	77,413	(95,596)
Earnings available to common shareholders	610,856	442,048	370,857
Operating Segments [Member] | Property and Casualty Insurance [Member]
Revenues:
Self-moving equipment rentals	0	0	0
Self-storage revenues	0	0	0
Self-moving and self-storage products and service sales	0	0	0
Property management fees	0	0	0
Life insurance premiums	0	0	0
Property and casualty insurance premiums	70,285	69,141	63,488
Net investment and interest income	16,452	19,923	12,349
Other revenue	0	0	0
Total revenues	86,737	89,064	75,837
Costs and expenses:
Operating expenses	35,450	33,770	34,218
Commission expenses	0	0	0
Cost of sales	0	0	0
Benefits and losses	18,558	12,410	14,213
Amortization of deferred policy acquisition costs	0	0	0
Lease expense	231	0	0
Depreciation, net of (gains) losses on disposals	0	0	0
Net gains on disposal of real estate	0	0	0
Total costs and expenses	54,239	46,180	48,431
Earnings from operations before equity in earnings of subsidiaries	32,498	42,884	27,406
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	32,498	42,884	27,406
Other components of net periodic benefit costs	0	0	0
Interest expense	0	0	0
Pretax earnings	32,498	42,884	27,406
Income tax expense	(6,778)	(8,956)	(5,698)
Earnings available to common shareholders	25,720	33,928	21,708
Operating Segments [Member] | Life Insurance [Member]
Revenues:
Self-moving equipment rentals	0	0	0
Self-storage revenues	0	0	0
Self-moving and self-storage products and service sales	0	0	0
Property management fees	0	0	0
Life insurance premiums	121,609	127,976	63,488
Property and casualty insurance premiums	0	0	0
Net investment and interest income	107,745	109,018	86,395
Other revenue	3,280	4,470	4,831
Total revenues	232,634	241,464	154,714
Costs and expenses:
Operating expenses	20,376	21,425	14,613
Commission expenses	0	0	0
Cost of sales	0	0	0
Benefits and losses	160,954	162,426	86,064
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Lease expense	135	0	0
Depreciation, net of (gains) losses on disposals	0	0	0
Net gains on disposal of real estate	0	0	0
Total costs and expenses	209,758	215,070	129,233
Earnings from operations before equity in earnings of subsidiaries	22,876	26,394	25,481
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	22,876	26,394	25,481
Other components of net periodic benefit costs	0	0	0
Interest expense	0	0	0
Pretax earnings	22,876	26,394	25,481
Income tax expense	(4,155)	(4,533)	(5,378)
Earnings available to common shareholders	18,721	21,861	20,103
Eliminations [Member]
Revenues:
Self-moving equipment rentals	(3,507)	(4,103)	(2,830)
Self-storage revenues	0	0	0
Self-moving and self-storage products and service sales	0	0	0
Property management fees	0	0	0
Life insurance premiums	0	0	0
Property and casualty insurance premiums	(1,506)	(3,088)	(2,635)
Net investment and interest income	(3,518)	(1,705)	(1,667)
Other revenue	(529)	(530)	(521)
Total revenues	(9,060)	(9,426)	(7,653)
Costs and expenses:
Operating expenses	(5,523)	(7,702)	(5,968)
Commission expenses	0	0	0
Cost of sales	0	0	0
Benefits and losses	0	0	0
Amortization of deferred policy acquisition costs	0	0	0
Lease expense	(2,447)	(612)	(544)
Depreciation, net of (gains) losses on disposals	0	0	0
Net gains on disposal of real estate	0	0	0
Total costs and expenses	(7,970)	(8,314)	(6,512)
Earnings from operations before equity in earnings of subsidiaries	(1,090)	(1,112)	(1,141)
Equity in earnings of subsidiaries	(44,441)	(55,789)	(41,811)
Earnings from operations	(45,531)	(56,901)	(42,952)
Other components of net periodic benefit costs	0	0	0
Interest expense	1,090	1,112	1,141
Pretax earnings	(44,441)	(55,789)	(41,811)
Income tax expense	0	0	0
Earnings available to common shareholders	$ (44,441)	$ (55,789)	$ (41,811)

Consolidating financial infor_5

Consolidating financial information by industry segment (Cash Flow Statements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flow from operating activities:
Net earnings	$ 610,856	$ 442,048	$ 370,857
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,001	664,120	581,025
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Amortization of premiums and accretion of discounts related to investments, net	14,229	13,317	13,107
Amortization of debt issuance costs	5,948	4,426	3,923
Interest credited to policyholders	55,321	51,857	35,387
Change in allowance for losses on trade receivables	1,206	(14)	52
Change in allowance for inventory reserves	1,298	640	(146)
Net gains on disposal of personal property	(54,071)	(27,057)	(26,982)
Net gains on disposal of real estate	3,281	(758)	(44)
Net gains on sales of investments	(10,058)	(13,596)	(2,663)
Net losses on equity investments	(394)	(3,783)	5,739
Deferred income taxes	68,411	317,893	106,811
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(39,516)	38,129	(31,365)
Inventories and parts	(5,775)	1,776	(13,492)
Prepaid expenses	94,359	(391,120)	(8,620)
Capitalization of deferred policy acquisition costs	(36,162)	(24,447)	(25,957)
Other assets	29,865	(1,295)	157,152
Related party assets	(487)	(5,645)	4,194
Accounts payable and accrued expenses	92,925	(4,530)	10,263
Policy benefits and losses, claims and loss expenses payable	(1,992)	(12,618)	(236,120)
Other policyholders' funds and liabilities	2,230	(4,857)	5,007
Deferred income	11,567	(1,818)	966
Related party liabilities	60	1,626	(2,067)
Net cash provided by operating activities	1,535,395	1,075,513	975,583
Cash flow from investing activities:
Escrow deposits	(5,221)	6,617	4,299
Purchase of:
Property, plant and equipment	(1,441,475)	(2,309,406)	(1,869,968)
Short term investments	(69,929)	(61,226)	(54,048)
Fixed maturities investments	(606,233)	(379,349)	(540,045)
Equity securities	(962)	(83)	(957)
Preferred stock	(16,144)	0	0
Real estate	(622)	(4,286)	(635)
Mortgage loans	(158,071)	(62,016)	(63,611)
Proceeds from sale and paydowns of:
Property, plant and equipment	537,484	687,375	606,271
Short term investments	69,718	59,056	66,037
Fixed maturities investments	529,239	268,636	123,551
Equity securities	207	185	8,608
Preferred stock	2,700	2,375	1,625
Real estate	255	311	0
Mortgage loans	29,525	25,162	147,737
Net cash used by investing activities	(1,129,529)	(1,766,649)	(1,571,136)
Cash flow from financing activities:
Borrowings from credit facilities	922,008	1,121,412	897,311
Principal repayments on credit facilities	(662,588)	(349,986)	(299,748)
Debt issuance costs	(5,793)	(5,332)	(7,243)
Capital lease payments	(221,247)	(307,782)	(303,431)
Employee stock ownership plan shares	0	(206)	(418)
Common stock dividends paid	(49,019)	(29,404)	(39,179)
Net contribution from (to) related party	0	0
Investment contract deposits	517,856	234,640	400,123
Investment contract withdrawals	(213,864)	(151,022)	(132,833)
Net cash provided by financing activities	287,353	512,320	514,582
Effects of exchange rate on cash	6,441	(533)	(4,716)
Increase (decrease) in cash and cash equivalents	699,660	(179,349)	(85,687)
Cash and cash equivalents at the beginning of period	494,352	673,701	759,388
Cash and cash equivalents at the end of the period	1,194,012	494,352	673,701
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Cash flow from operating activities:
Net earnings	610,856	442,048	370,857
Earnings from consolidated subsidiaries	(44,441)	(55,789)	(41,811)
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,001	664,120	581,025
Amortization of deferred policy acquisition costs	0	0	0
Amortization of premiums and accretion of discounts related to investments, net	0	0	0
Amortization of debt issuance costs	5,948	4,426	3,923
Interest credited to policyholders	0	0	0
Change in allowance for losses on trade receivables	1,424	(14)	57
Change in allowance for inventory reserves	1,298	640	(146)
Net gains on disposal of personal property	(54,071)	(27,057)	(26,982)
Net gains on disposal of real estate	3,281	(758)	(44)
Net gains on sales of investments	0	0	0
Net losses on equity investments	0	0	0
Deferred income taxes	72,407	323,980	112,434
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(60,806)	30,771	(26,160)
Inventories and parts	(5,775)	1,776	(13,492)
Prepaid expenses	94,359	(391,120)	(8,620)
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	29,879	(3,099)	159,126
Related party assets	(12,790)	(5,106)	3,857
Accounts payable and accrued expenses	96,309	(4,428)	6,454
Policy benefits and losses, claims and loss expenses payable	14,919	3,092	(159,793)
Other policyholders' funds and liabilities	0	0	0
Deferred income	10,959	(1,818)	966
Related party liabilities	1,136	(1,170)	(2,711)
Net cash provided by operating activities	1,428,893	980,494	958,940
Cash flow from investing activities:
Escrow deposits	(5,221)	6,617	4,299
Purchase of:
Property, plant and equipment	(1,441,475)	(2,309,406)	(1,869,968)
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0	0
Preferred stock	0
Real estate	0	0	(236)
Mortgage loans	0	0	0
Proceeds from sale and paydowns of:
Property, plant and equipment	537,484	687,375	606,271
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0	0
Preferred stock	0	0	0
Real estate	255	311
Mortgage loans	0	0	0
Net cash used by investing activities	(908,957)	(1,615,103)	(1,259,634)
Cash flow from financing activities:
Borrowings from credit facilities	912,408	1,118,912	897,311
Principal repayments on credit facilities	(652,728)	(347,486)	(299,748)
Debt issuance costs	(5,793)	(5,332)	(7,243)
Capital lease payments	(221,247)	(307,782)	(303,431)
Employee stock ownership plan shares		(206)	(418)
Common stock dividends paid	(49,019)	(29,404)	(39,179)
Net contribution from (to) related party	41,199	21,600
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	24,820	450,302	247,292
Effects of exchange rate on cash	6,441	(533)	(4,716)
Increase (decrease) in cash and cash equivalents	551,197	(184,840)	(58,118)
Cash and cash equivalents at the beginning of period	459,078	643,918	702,036
Cash and cash equivalents at the end of the period	1,010,275	459,078	643,918
Operating Segments [Member] | Property and Casualty Insurance [Member]
Cash flow from operating activities:
Net earnings	25,720	33,928	21,708
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	0	0	0
Amortization of deferred policy acquisition costs	0	0	0
Amortization of premiums and accretion of discounts related to investments, net	1,578	1,469	1,361
Amortization of debt issuance costs	0	0	0
Interest credited to policyholders	0	0	0
Change in allowance for losses on trade receivables	(217)	0	0
Change in allowance for inventory reserves	0	0	0
Net gains on disposal of personal property	0	0	0
Net gains on disposal of real estate	0	0	0
Net gains on sales of investments	(158)	(355)	(2,971)
Net losses on equity investments	(394)	(3,783)	5,739
Deferred income taxes	459	(2,847)	830
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	27,302	8,127	(2,438)
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	537	2,098	(1,449)
Related party assets	303	(539)	339
Accounts payable and accrued expenses	(3,497)	2,688	257
Policy benefits and losses, claims and loss expenses payable	(31,398)	(19,618)	(4,400)
Other policyholders' funds and liabilities	(2,053)	491	(117)
Deferred income	0	0	0
Related party liabilities	1,187	819	944
Net cash provided by operating activities	19,369	22,478	19,803
Cash flow from investing activities:
Escrow deposits	0	0	0
Purchase of:
Property, plant and equipment	0	0	0
Short term investments	(69,929)	(60,590)	(53,878)
Fixed maturities investments	(18,823)	(13,001)	(33,775)
Equity securities	0	0	0
Preferred stock	0
Real estate	0	(328)	(187)
Mortgage loans	(18,035)	(18,050)	(20,031)
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	69,669	59,056	58,767
Fixed maturities investments	20,854	25,386	12,305
Equity securities	0	185	8,608
Preferred stock	2,700	1,375	1,625
Real estate	0	0
Mortgage loans	17,659	4,126	5,881
Net cash used by investing activities	4,095	(1,841)	(20,685)
Cash flow from financing activities:
Borrowings from credit facilities	0	0	0
Principal repayments on credit facilities	0	0	0
Debt issuance costs	0	0	0
Capital lease payments	0	0	0
Employee stock ownership plan shares		0	0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	(22,600)	(21,600)
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	(22,600)	(21,600)	0
Effects of exchange rate on cash	0	0	0
Increase (decrease) in cash and cash equivalents	864	(963)	(882)
Cash and cash equivalents at the beginning of period	4,794	5,757	6,639
Cash and cash equivalents at the end of the period	5,658	4,794	5,757
Operating Segments [Member] | Life Insurance [Member]
Cash flow from operating activities:
Net earnings	18,721	21,861	20,103
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	0	0	0
Amortization of deferred policy acquisition costs	28,293	31,219	28,556
Amortization of premiums and accretion of discounts related to investments, net	12,651	11,848	11,746
Amortization of debt issuance costs	0	0	0
Interest credited to policyholders	55,321	51,857	35,387
Change in allowance for losses on trade receivables	(1)	0	(5)
Change in allowance for inventory reserves	0	0	0
Net gains on disposal of personal property	0	0	0
Net gains on disposal of real estate	0	0	0
Net gains on sales of investments	(9,900)	(13,241)	308
Net losses on equity investments	0	0	0
Deferred income taxes	(4,455)	(3,240)	(6,453)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(6,012)	(769)	(2,767)
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	(36,162)	(24,447)	(25,957)
Other assets	(551)	(294)	(525)
Related party assets	0	0	(2)
Accounts payable and accrued expenses	113	(2,790)	3,552
Policy benefits and losses, claims and loss expenses payable	14,487	3,908	(71,927)
Other policyholders' funds and liabilities	4,283	(5,348)	5,124
Deferred income	608	0	0
Related party liabilities	9,737	1,977	(300)
Net cash provided by operating activities	87,133	72,541	(3,160)
Cash flow from investing activities:
Escrow deposits	0	0	0
Purchase of:
Property, plant and equipment	0	0	0
Short term investments	0	(636)	(170)
Fixed maturities investments	(587,410)	(366,348)	(506,270)
Equity securities	(962)	(83)	(957)
Preferred stock	(16,144)
Real estate	(622)	(3,958)	(212)
Mortgage loans	(140,036)	(43,966)	(43,580)
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	49	0	7,270
Fixed maturities investments	508,385	243,250	111,246
Equity securities	207	0	0
Preferred stock	0	1,000	0
Real estate	0	0
Mortgage loans	11,866	21,036	141,856
Net cash used by investing activities	(224,667)	(149,705)	(290,817)
Cash flow from financing activities:
Borrowings from credit facilities	9,600	2,500	0
Principal repayments on credit facilities	(9,860)	(2,500)	0
Debt issuance costs	0	0	0
Capital lease payments	0	0	0
Employee stock ownership plan shares		0	0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	(18,599)	0
Investment contract deposits	517,856	234,640	400,123
Investment contract withdrawals	(213,864)	(151,022)	(132,833)
Net cash provided by financing activities	285,133	83,618	267,290
Effects of exchange rate on cash	0	0	0
Increase (decrease) in cash and cash equivalents	147,599	6,454	(26,687)
Cash and cash equivalents at the beginning of period	30,480	24,026	50,713
Cash and cash equivalents at the end of the period	178,079	30,480	24,026
Eliminations [Member]
Cash flow from operating activities:
Net earnings	(44,441)	(55,789)	(41,811)
Earnings from consolidated subsidiaries	44,441	55,789	41,811
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	0	0	0
Amortization of deferred policy acquisition costs	0	0	0
Amortization of premiums and accretion of discounts related to investments, net	0	0	0
Amortization of debt issuance costs	0	0	0
Interest credited to policyholders	0	0	0
Change in allowance for losses on trade receivables	0	0	0
Change in allowance for inventory reserves	0	0	0
Net gains on disposal of personal property	0	0	0
Net gains on disposal of real estate	0	0	0
Net gains on sales of investments	0	0	0
Net losses on equity investments	0	0	0
Deferred income taxes	0	0	0
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	0	0	0
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	0	0	0
Related party assets	12,000	0	0
Accounts payable and accrued expenses	0	0	0
Policy benefits and losses, claims and loss expenses payable	0	0	0
Other policyholders' funds and liabilities	0	0	0
Deferred income	0	0	0
Related party liabilities	(12,000)	0	0
Net cash provided by operating activities	0	0	0
Cash flow from investing activities:
Escrow deposits	0	0	0
Purchase of:
Property, plant and equipment	0	0	0
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0	0
Preferred stock	0
Real estate	0	0	0
Mortgage loans	0	0	0
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0	0
Preferred stock	0	0	0
Real estate	0	0
Mortgage loans	0	0	0
Net cash used by investing activities	0	0	0
Cash flow from financing activities:
Borrowings from credit facilities	0	0	0
Principal repayments on credit facilities	0	0	0
Debt issuance costs	0	0	0
Capital lease payments	0	0	0
Employee stock ownership plan shares		0	0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	0	0
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	0	0	0
Effects of exchange rate on cash	0	0	0
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at the beginning of period	0	0	0
Cash and cash equivalents at the end of the period	$ 0	$ 0	$ 0

Revenue Recognition (Revenue Ov

Revenue Recognition (Revenue Over Time) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Contract With Customer Liability [Abstract]
2022	$ 23,839
2023	13,079
2024	9,612
2025	7,210
2026	5,648
Thereafter	55,060
Self Moving Equipment
Contract With Customer Liability [Abstract]
2022	4,740
2023	0
2024	0
2025	0
2026	0
Thereafter	0
Property Lease Revenue
Contract With Customer Liability [Abstract]
2022	19,099
2023	13,079
2024	9,612
2025	7,210
2026	5,648
Thereafter	$ 55,060

Revenue Recognition (Revenue di

Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Revenues recognized over time	$ 182,278	$ 147,565	$ 2,814,732
Revenues recognized at point in time	396,600	309,804	305,408
Total revenues recognized under ASC 606	578,878	457,369	3,120,140
Revenues recognized under ASC 840	3,644,798	3,182,902	406,070
Revenues recognized under ASC 944	195,371	200,768	131,563
Revenues recognized under ASC 320	122,938	137,829	110,934
Total revenues	$ 4,541,985	$ 3,978,868	$ 3,768,707

Allowance for Credit Losses (Na

Allowance for Credit Losses (Narratives) (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)
Receivables [Abstract]
Trade receivable components	2
Historical loss rate	5.00%
Allowance for expected credit losses	$ 2.8
Available for sale securities, accrued interest receivable	$ 25
Financing Receivable Additional Disclosures [Abstract]
Reinsurance paid percentage of total assets	1.00%
Premiums Receivable Gross	$ 3
Credit card receivables
Receivables [Abstract]
Average Historical Chargeback Term	For credit card receivables, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivables. The Company rents equipment to corporate customers in which payment terms are 30 days.
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Additional Disclosures [Abstract]
Modeling of mortgage loans	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 loan 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.

Allowance for Credit Losses (Re

Allowance for Credit Losses (Reserve Allowance Various Credit Loss) (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021USD ($)
Valuation And Qualifying Accounts [Abstract]
March 31, 2020	$ 3,684
Transition adjustment expected credit loss current	972
Write-offs against allowance	0
Recoveries	0
March 31, 2021	4,656
Trade Receivables
Valuation And Qualifying Accounts [Abstract]
March 31, 2020	2,680
Transition adjustment expected credit loss current	155
Write-offs against allowance	0
Recoveries	0
March 31, 2021	2,835
Investments, Fixed Maturities
Valuation And Qualifying Accounts [Abstract]
March 31, 2020	503
Transition adjustment expected credit loss current	817
Write-offs against allowance	0
Recoveries	0
March 31, 2021	1,320
Investments, Other
Valuation And Qualifying Accounts [Abstract]
March 31, 2020	501
Transition adjustment expected credit loss current	0
Write-offs against allowance	0
Recoveries	0
March 31, 2021	$ 501

Schedule I - Condensed Financ_2

Schedule I - Condensed Financial Information of AMERCO (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Taxes Paid, Net [Abstract]
Income taxes paid (net of income tax refunds)	$ 29,044	$ 6,859	$ 4,255

Schedule I - Condensed Financ_3

Schedule I - Condensed Financial Information of AMERCO (Balance Sheets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
ASSETS:
Cash and cash equivalents	$ 1,194,012	$ 494,352	$ 673,701	$ 759,388
Investments in subsidiaries	0	0
Related party assets	35,395	34,784
Total assets	14,651,606	13,438,024	11,891,713
Liabilities:
Other Liabilities	9,799,724	9,217,304
Stockholders' equity:
Additional paid-in capital	453,819	453,819
Accumulated other comprehensive loss	106,857	34,652
Consolidated statement of change in equity
Beginning of period	4,399,402
Adjustment for adoption of ASU 2016-13	(2,880)
Net earnings	610,856	442,048	370,857
End of period	4,958,359	4,399,402
Total stockholders' equity	4,851,882	4,220,720
Total liabilities and stockholders' equity	14,651,606	13,438,024
Common Stock in Treasury [Member]
Consolidated statement of change in equity
Cost of shares in treasury	(525,653)	(525,653)
Preferred Stock in Treasury [Member]
Consolidated statement of change in equity
Cost of shares in treasury	(151,997)	(151,997)
Amerco [Member]
ASSETS:
Cash and cash equivalents	751,053	294,528	428,950	$ 469,209
Investments in subsidiaries	3,284,760	2,758,509
Related party assets	1,535,355	1,734,358
Other assets	413,167	502,064
Total assets	5,984,335	5,289,459
Liabilities:
Other Liabilities	1,136,742	1,068,291
Stockholders' equity:
Preferred stock	0	0
Common stock	10,497	10,497
Additional paid-in capital	454,029	454,029
Accumulated other comprehensive loss	102,568	35,100
Consolidated statement of change in equity
Beginning of period	4,399,192	3,976,752
Adjustment for adoption of ASU 2016-13	(2,880)	0
Net earnings	610,856	442,048	370,857
Dividends	(49,019)	(19,608)
End of period	4,958,149	4,399,192	$ 3,976,752
Total stockholders' equity	4,847,593	4,221,168
Total liabilities and stockholders' equity	5,984,335	5,289,459
Amerco [Member] | Common Stock in Treasury [Member]
Consolidated statement of change in equity
Cost of shares in treasury	(525,653)	(525,653)
Amerco [Member] | Preferred Stock in Treasury [Member]
Consolidated statement of change in equity
Cost of shares in treasury	$ (151,997)	$ (151,997)

Schedule I - Condensed Financ_4

Schedule I - Condensed Financial Information of AMERCO (Statements of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Net interest income from subs	$ 4,541,985	$ 3,978,868	$ 3,768,707
Expenses:
Operating expenses	2,187,684	2,117,148	1,981,180
Total costs and expenses	3,580,838	3,438,740	3,147,720
Equity in earnings of subsidiaries	0	0	0
Pretax earnings	796,658	378,124	477,529
Income tax expense	(185,802)	63,924	(106,672)
Earnings available to common shareholders	$ 610,856	$ 442,048	$ 370,857
Basic and diluted earnings per common share	$ 31.15	$ 22.55	$ 18.93
Weighted average common shares outstanding: basic and diluted	19,607,788	19,603,708	19,592,048
Amerco [Member]
Revenues:
Net interest income from subs	$ 720	$ 6,586	$ 8,601
Expenses:
Operating expenses	6,753	10,622	8,840
Other expenses	115	96	93
Total costs and expenses	6,868	10,718	8,933
Equity in earnings of subsidiaries	508,632	205,940	279,589
Interest income	135,673	130,670	112,649
Pretax earnings	638,157	332,478	391,906
Income tax expense	(27,301)	109,570	(21,049)
Earnings available to common shareholders	$ 610,856	$ 442,048	$ 370,857
Basic and diluted earnings per common share	$ 31.15	$ 22.55	$ 18.93
Weighted average common shares outstanding: basic and diluted	19,607,788	19,603,708	19,592,048

Schedule I - Condensed Financ_5

Schedule I - Condensed Financial Information Of AMERCO (Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Net earnings	$ 610,856	$ 442,048	$ 370,857
Amerco [Member]
Net earnings	610,856	442,048	370,857
Other comprehensive income (loss)	72,205	101,350	(62,075)
Total comprehensive income	$ 683,061	$ 543,398	$ 308,782

Schedule I - Condensed Financ_6

Schedule I - Condensed Financial Information of AMERCO (Statements of Cash Flow) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flow from operating activities:
Net earnings	$ 610,856	$ 442,048	$ 370,857
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,001	664,120	581,025
Net loss on sales of investments	(10,058)	(13,596)	(2,663)
Deferred income taxes	68,411	317,893	106,811
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(39,516)	38,129	(31,365)
Prepaid expenses	94,359	(391,120)	(8,620)
Other assets	29,865	(1,295)	157,152
Related party assets	(487)	(5,645)	4,194
Accounts payable and accrued expenses	92,925	(4,530)	10,263
Net cash provided by operating activities	1,535,395	1,075,513	975,583
Cash flow from investing activities:
Purchases of property, plant and equipment	(1,441,475)	(2,309,406)	(1,869,968)
Proceeds of equity securities	207	185	8,608
Net cash used by investing activities	(1,129,529)	(1,766,649)	(1,571,136)
Cash flow from financing activities:
Borrowings from credit facilities	922,008	1,121,412	897,311
Principal repayments on credit facilities	(662,588)	(349,986)	(299,748)
Debt issuance costs	(5,793)	(5,332)	(7,243)
Common stock dividends paid	(49,019)	(29,404)	(39,179)
Net contribution from (to) related party	0	0
Net Cash Provided by (Used in) Financing Activities	287,353	512,320	514,582
Effects of exchange rate on cash	6,441	(533)	(4,716)
Increase (decrease) in cash and cash equivalents	699,660	(179,349)	(85,687)
Cash and cash equivalents at the beginning of period	494,352	673,701	759,388
Cash and cash equivalents at the end of the period	1,194,012	494,352	673,701
Amerco [Member]
Cash flow from operating activities:
Net earnings	610,856	442,048	370,857
Earnings from consolidated subsidiaries	(508,632)	(205,940)	(279,589)
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	1	1	1
Net loss on sales of investments	924	0	0
Deferred income taxes	72,407	323,980	112,434
Net change in other operating assets and liabilities:
Prepaid expenses	88,898	(381,190)	(6,289)
Other assets	0	22	(40)
Related party assets	(12,000)	0	0
Accounts payable and accrued expenses	(4,019)	1,935	2,260
Net cash provided by operating activities	248,435	180,856	199,634
Cash flow from investing activities:
Purchases of property, plant and equipment	(3)	0	(1)
Proceeds of equity securities	0	0	0
Net cash used by investing activities	(3)	0	(1)
Cash flow from financing activities:
Borrowings from credit facilities	200,000	0	0
Principal repayments on credit facilities	(200,000)	0	0
Debt issuance costs	(924)	0	0
Proceeds from (repayments) of intercompany loans	211,064	(311,534)	(196,382)
Common stock dividends paid	(49,019)	(29,404)	(39,179)
Net contribution from (to) related party	41,199	21,600	0
Net Cash Provided by (Used in) Financing Activities	202,320	(319,338)	(235,561)
Effects of exchange rate on cash	5,773	4,060	(4,331)
Increase (decrease) in cash and cash equivalents	456,525	(134,422)	(40,259)
Cash and cash equivalents at the beginning of period	294,528	428,950	469,209
Cash and cash equivalents at the end of the period	$ 751,053	$ 294,528	$ 428,950

Schedule II - AMERCO and Cons_2

Schedule II - AMERCO and Consolidated Subsidiaries, Valuation and Qualifying Accounts (Details) - Amerco [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Allowance for doubtful accounts (deducted from trade receivable) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 535	$ 549	$ 496
Additions charged to cost and expenses	2,179	731	1,550
Additions charged to other accounts	2,680	0	0
Deductions	(973)	(745)	(1,497)
Balance at year end	4,421	535	549
Allowance for obsolescence (deducted from inventory) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	3,063	2,322	5,329
Additions charged to cost and expenses	0	741	0
Additions charged to other accounts	0	0	0
Deductions	(1,647)	0	(3,007)
Balance at year end	1,416	3,063	2,322
Allowance for LIFO (deducted from inventory) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	18,886	18,987	16,126
Additions charged to cost and expenses	2,946	0	2,861
Additions charged to other accounts	0	0	0
Deductions	0	(101)	0
Balance at year end	21,832	18,886	18,987
Allowance for probable losses (deducted from mortgage loans) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	493	493	618
Additions charged to cost and expenses	0	0	0
Additions charged to other accounts	0	0	0
Deductions	(45)	0	(125)
Balance at year end	$ 448	$ 493	$ 493

Schedule V - AMERCO and Consoli

Schedule V - AMERCO and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations) (Details) - Property Casualty Insurance Operations [Member] - Amerco [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Information For Property And Casualty Insurance Underwriters [Abstract]
Deferred policy acquisition costs	$ 0	$ 0	$ 0
Reserves for unpaid claims and claims adjustment expense	177,963	209,127	228,970
Discount if any, deducted	(294)	233	239
Unearned premiums	70,283	69,138	60,853
Net earned premiums (1)	16,335	19,926	9,373
Net investment income (2)	20,670	22,137	19,579
Claim and claim adjustment expenses incurred related to current year	(3,865)	(9,535)	(5,365)
Amortization of deferred policy acquisition costs	0	0	0
Paid claims and claim adjustment expense	25,759	24,608	19,228
Net premiums written (1)	$ 69,989	$ 66,277	$ 61,022

Schedule V - AMERCO and Conso_2

Schedule V - AMERCO and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations), Parenthetical (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment Income, Net [Abstract]
Premiums Earned, Net	$ 191,894	$ 197,117	$ 124,336
Property Casualty Insurance Operations [Member] | Amerco [Member]
Investment Income, Net [Abstract]
Written premiums, net	1,500	3,100	2,800
Premiums Earned, Net	1,800	2,800	2,600
(Gain) Loss on Investments	$ 100	$ 400	$ 3,000