U-Haul Holding (UHAL) 10-K 27 May 20 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2020	May 22, 2020	Sep. 30, 2019
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			$ 3,494,102,743
Document Fiscal Year Focus	2020
Document Type	10-K
Document Fiscal Period Focus	FY
Document Period End Date	Mar. 31, 2020
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, 2020	Mar. 31, 2019
ASSETS:
Cash and cash equivalents	$ 494,352	$ 673,701
Reinsurance recoverables and trade receivables, net	186,672	224,785
Inventories, net	101,083	103,504
Prepaid expenses	562,904	174,100
Investments, fixed maturities and marketable equities	2,492,738	2,235,397
Investments, other	360,373	300,736
Deferred policy acquisition costs, net	103,118	136,276
Other assets	71,956	78,354
Right of use assets, financing, net	1,080,353	0
Right of use assets, operating	106,631	0
Related party assets	34,784	30,889
Subtotal assets	5,594,964	3,957,742
Property, plant and equipment, at cost:
Land	1,032,945	976,454
Buildings and improvements	4,663,461	4,003,726
Furniture and equipment	752,363	689,780
Property, plant and equipment (gross)	10,556,222	11,022,027
Less: Accumulated depreciation	(2,713,162)	(3,088,056)
Total property, plant and equipment	7,843,060	7,933,971
Total assets	13,438,024	11,891,713
Liabilities:
Accounts payable and accrued expenses	554,353	556,873
Notes, loans and leases payable	4,621,291	4,163,323
Operating lease liabilities	106,443	0
Policy benefits and losses, claims and loss expenses payable	997,647	1,011,183
Liabilities from investment contracts	1,802,217	1,666,742
Other policyholders' funds and liabilities	10,190	15,047
Deferred income	31,620	35,186
Deferred income taxes, net	1,093,543	750,970
Total liabilities	9,217,304	8,199,324
Commitments and contingencies (notes 9, 16, 17 and 18)
Stockholders' equity:
Additional paid-in capital	453,819	453,326
Accumulated other comprehensive loss	34,652	(66,698)
Retained earnings	4,399,402	3,976,962
Unearned employee stock ownership plan shares	0	(4,048)
Total stockholders' equity	4,220,720	3,692,389
Total liabilities and stockholders' equity	13,438,024	11,891,713
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	511,520	590,039
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 3,595,933	$ 4,762,028

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets Parenthetical	Mar. 31, 2020$ / 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]
Common stock:
Common stock, shares authorized	250,000,000
Serial Common Stock [Member]
Common stock:
Common stock, shares authorized	10,000,000
Common stock, par or stated value per share | $ / shares	$ 0.25
Common Stock [Member]
Common stock:
Common stock, shares authorized	250,000,000
Common stock, par or stated value per share | $ / shares	$ 0.25
Amerco Common Stock [Member]
Common stock:
Common stock, shares authorized	250,000,000
Common stock, shares, issued	41,985,700
Common stock, shares, outstanding	19,607,788
Common stock, par or stated value per share | $ / shares	$ 0.25
Common Stock in Treasury [Member]
Treasury stock:
Treasury stock, shares	22,377,912
Preferred Stock in Treasury [Member]
Treasury stock:
Treasury stock, shares	6,100,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Self-moving equipment rentals	$ 2,692,413	$ 2,653,497	$ 2,479,742
Self-storage revenues	418,741	367,276	323,903
Self-moving and self-storage products and service sales	265,091	264,146	261,557
Property management fees	30,406	29,148	29,602
Life insurance premiums	127,976	63,488	154,703
Property and casualty insurance premiums	66,053	60,853	57,100
Net investment and interest income	137,829	110,934	110,473
Other revenue	240,359	219,365	184,034
Total revenues	3,978,868	3,768,707	3,601,114
Costs and expenses:
Operating expenses	2,117,148	1,981,180	1,807,056
Commission expenses	288,332	288,408	276,705
Cost of sales	164,018	162,142	160,489
Benefits and losses	174,836	100,277	185,311
Amortization of deferred policy acquisition costs	31,219	28,556	24,514
Lease expense	26,882	33,158	33,960
Depreciation, net of (gains) losses on disposals	637,063	554,043	543,247
Net gains on disposal of real estate	(758)	(44)	(195,414)
Total costs and expenses	3,438,740	3,147,720	2,835,868
Earnings from operations	540,128	620,987	765,246
Pretax earnings	378,124	477,529	637,613
Earnings available to common shareholders	$ 442,048	$ 370,857	$ 790,583
Basic and diluted earnings per common share	$ 22.55	$ 18.93	$ 40.36
Weighted average common shares outstanding: basic and diluted	19,603,708	19,592,048	19,588,889

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Comprehensive income (loss) (pretax):
Net earnings	$ 378,124	$ 477,529	$ 637,613
Comprehensive income (loss) (net of tax):
Net earnings	442,048	370,857	790,583
Other comprehensive income (loss):
Foreign currency translation (pretax)	9,377	(1,759)	14,652
Foreign currency translation (tax effect)	0	0	0
Foreign currency translation (net of tax)	9,377	(1,759)	14,652
Unrealized gain (loss) on investments (pretax)	124,566	(76,124)	30,929
Unrealized gain (loss) on investments (tax effect)	(26,623)	16,356	(10,825)
Unrealized gain (loss) on investments (net of tax)	97,943		20,104
Change in fair value of cash flow hedges (pretax)	(8,352)	598	4,445
Change in fair value of cash flow hedges (tax effect)	2,051	(147)	(1,363)
Change in fair value of cash flow hedges (net of tax)			3,082
Amounts reclassifed into earnings on hedging	(3)	35	0
Amounts reclassified into earnings on hedging, tax			0
Amounts reclassified into earnings on hedging, net	(401)	789	3,893
Postretirement benefit obligation gain (loss) (pretax)	441	(1,359)	288
Postretirement benefit obligation gain (loss) (tax effect)	(108)	334	(253)
Postretirement benefit obligation gain (loss) (net of tax)	333	(1,025)	35
Total other comprehensive income loss	101,350	(62,075)	37,873
Total comprehensive income, net	$ 543,398	$ 308,782	$ 828,456

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, 2017	$ 2,619,744	$ 10,497	$ 452,172	$ (51,236)	$ 2,892,893	$ (525,653)	$ (151,997)	$ (6,932)
Consolidated statement of change in equity
Adjustment for adoption of ASU 2018-02	0	0	0	8,740	(8,740)	0	0	0
Increase in market value of released ESOP shares	574	0	574	0	0	0	0	0
Release of unearned ESOP Shares	10,749	0	0	0	0	0	0	10,749
Purchase of ESOP shares	(11,640)	0	0	0	0	0	0	(11,640)
Foreign currency translation	14,652	0	0	14,652	0	0	0	0
Unrealized net gain (loss) on investments, net of tax	20,104	0	0	20,104	0	0	0	0
Fair market value of cash flow hedges, net of tax	3,082	0	0	3,082	0	0	0	0
Adjustment to postretirement benefit obligation	35	0	0	35	0	0	0	0
Net earnings	790,583	0	0	0	790,583	0	0	0
Common stock dividends	(39,175)	0	0	0	(39,175)	0	0	0
Net activity	788,964	0	574	46,613	742,668	0	0	(891)
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
Adjustment for 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		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		0	0	(50,044)	0	0	0	0
Fair market value of cash flow hedges, net of tax		0	0	477	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
Adjustment for adoption of ASU 2018-02	(8,700)
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		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
Fair market value of cash flow hedges, net of tax		0	0		0	0	0	0
Adjustment to postretirement benefit obligation	333	0	0	333	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 Chang

Consolidated Statement of Changes in Stockholders' Equity Parenthetical - $ / shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Retained Earnings [Member]
Common Stock, Dividends, Per Share, Declared	$ 1	$ 2	$ 2

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flow from operating activities:
Net earnings	$ 442,048	$ 370,857	$ 790,583
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,120	581,025	555,069
Amortization of deferred policy acquisition costs	31,219	28,556	24,514
Amortization of premiums and accretion of discounts related to investments, net	13,317	13,107	12,790
Amortization of debt issuance costs	4,426	3,923	3,868
Interest credited to policyholders	51,857	35,387	32,302
Change in allowance for losses on trade receivables	(14)	52	(120)
Change in allowance for inventory reserves	640	(146)	5,065
Net gains on disposal of real estate	(758)	(44)	(195,414)
Net gains on sales of investments	(13,596)	(2,663)	(6,269)
Net losses on equity investments	(3,783)	5,739	0
Deferred income taxes	317,893	106,811	(193,434)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	38,129	(31,365)	(15,329)
Inventories and parts	1,776	(13,492)	(12,384)
Prepaid expenses	(391,120)	(8,620)	(40,765)
Capitalization of deferred policy acquisition costs	(24,447)	(25,957)	(27,350)
Other assets	(1,295)	157,152	(165,968)
Related party assets	(5,645)	4,194	53,408
Accounts payable and accrued expenses	(4,530)	10,263	(36,980)
Policy benefits and losses, claims and loss expenses payable	(12,618)	(236,120)	161,121
Other policyholders' funds and liabilities	(4,857)	5,007	(109)
Deferred income	(1,818)	966	5,524
Related party liabilities	1,626	(2,067)	(616)
Net cash provided by operating activities	1,075,513	975,583	937,684
Cash flow from investing activities:
Escrow deposits	6,617	4,299	31,362
Purchase of:
Property, plant and equipment	(2,309,406)	(1,869,968)	(1,363,745)
Short term investments	(61,226)	(54,048)	(63,556)
Fixed maturities investments	(379,349)	(540,045)	(390,900)
Equity securities	(83)	(957)	(662)
Preferred stock	0	0	(1,000)
Real estate	(4,286)	(635)	(1,939)
Mortgage loans	(62,016)	(63,611)	(83,507)
Proceeds from sale and paydowns of:
Property, plant and equipment	687,375	606,271	699,803
Short term investments	59,056	66,037	67,790
Fixed maturities investments	268,636	123,551	163,469
Equity securities	185	8,608	0
Preferred stock	2,375	1,625	4,208
Real estate	311	0	2,783
Mortgage loans	25,162	147,737	37,590
Net cash used by investing activities	(1,766,649)	(1,571,136)	(898,304)
Cash flow from financing activities:
Borrowings from credit facilities	1,121,412	897,311	498,464
Principal repayments on credit facilities	(349,986)	(299,748)	(356,451)
Debt issuance costs	(5,332)	(7,243)	(5,111)
Capital lease payments	(307,782)	(303,431)	(296,363)
Employee stock ownership plan			(11,640)
Securitization deposits	0	0	(2,180)
Common stock dividends paid	(29,404)	(39,179)	(29,380)
Investment contract deposits	234,640	400,123	401,814
Investment contract withdrawals	(151,022)	(132,833)	(182,549)
Net cash provided by financing activities	512,320	514,582	16,604
Effects of exchange rate on cash	(533)	(4,716)	5,598
Increase (decrease) in cash and cash equivalents	(179,349)	(85,687)	61,582
Cash and cash equivalents at the beginning of period	673,701	759,388	697,806
Cash and cash equivalents at the end of the period	$ 494,352	$ 673,701	$ 759,388

Basis of Presentation

Basis of Presentation	12 Months Ended
	Mar. 31, 2020
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 2019, 2018 and 2017 correspond to fiscal 2020, 2019 and 2018 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, 2020
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. 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.   Description of Operating Segments AMERCO has three ( 3 ) reportable segments. They are Moving and Storage, Property and Casualty Insurance and Life Insurance. F- 10   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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, 2020
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, 2020 and March 31, 2019, 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. 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. In determining if and when a decline in market value below carrying value is an other-than-temporary impairment, management makes certain assumptions or judgments in its assessment including but not limited to: our ability to hold the security, quoted market prices, dealer quotes, discounted cash flows, industry factors, financial factors, and issuer specific information. Other-than-temporary impairments, to the extent of the decline, as well as realized gains or losses on the sale or exchange of investments are recognized in the current period operating results. F- 11   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 possible losses and any unamortized premium or discount. 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,     2020   2019     (In thousands) Truck and trailer parts and accessories (a) $ 88,138 $ 94,344 Hitches and towing components (b)   23,070   20,113 Moving supplies and propane (b)   11,824   10,356 Subtotal   123,032   124,813 Less: LIFO reserves   (18,886)   (18,987) Less: excess and obsolete reserves   (3,063)   (2,322) Total $ 101,083 $ 103,504           (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. 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, 2020 and 2019. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $18.9 million and $19.0 million higher as of March 31, 2020 and 2019, respectively. In fiscal 2020, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.1 million. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 $ 27.1 million, $ 27.0 million and $ 11.8 million during fiscal 2020, 2019 and 2018, 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 $ 27.7 million and $ 21.0 million in fiscal 2020 and 2019, 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 $ 69.6 million and $ 53.5 million for fiscal 2020 and 2019, 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 uncollectible accounts. F- 13   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 Current conditions affecting claim settlements Future economic conditions including inflation F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 $ 410.1 million and $ 407.9 million of liabilities related to these programs as of March 31, 2020 and 2019, 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, 2020 and 2019, the consolidated balance sheets include liabilities of $ 15.7 million and $ 15.6 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 $ 13.7 million, $ 10.6 million and $ 8.1 million in fiscal 2020, 2019 and 2018, 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, 2019 and 2018, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.8 million and $ 19.1 million, respectively on the consolidated balance sheet and amortization expense totaled $ 5.5 million, $ 3.7 million and $ 3.7 million for the periods ended December 31, 2019, 2018 and 2017, 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 fut

Earnings Per Share

Earnings Per Share	12 Months Ended
	Mar. 31, 2020
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 ; and 17,581 as of March 31, 2019 and 2018, respectively. As of March 31, 2020, all of these shares have been released.

Reinsurance Recoverables and Tr

Reinsurance Recoverables and Trade Receivables, Net	12 Months Ended
	Mar. 31, 2020
Reinsurance Disclosures [Abstract]
Reinsurance Recoverables and Trade Receivables, Net	F- 18   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Note 5.   Reinsurance Recoverables and Trade Receivables, Net Reinsurance recoverables and trade receivables, net were as follows:     March 31,     2020   2019     (In thousands) Reinsurance recoverable $ 89,020 $ 99,615 Trade accounts receivable   59,394   90,786 Paid losses recoverable   624   2,333 Accrued investment income   25,744   25,142 Premiums and agents' balances   1,582   1,545 Independent dealer receivable   1,015   390 Other receivables   9,828   5,523     187,207   225,334 Less: Allowance for doubtful accounts   (535)   (549)   $ 186,672 $ 224,785

Investments

Investments	12 Months Ended
	Mar. 31, 2020
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 $ 30.8 million for both December 31, 2019 and 2018. Available-for-Sale Investments 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   Estimated Market 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 F- 19   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Available-for-sale investments as of March 31, 2019 were as follows:       Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Estimated Market Value           (In thousands) U.S. treasury securities and government obligations $ 136,010 $ 2,409 $ (2,104) $ (447) $ 135,868 U.S. government agency mortgage-backed securities   31,101   433   (146)   (19)   31,369 Obligations of states and political subdivisions   298,955   8,079   (233)   (905)   305,896 Corporate securities   1,613,199   14,777   (14,257)   (24,986)   1,588,733 Mortgage-backed securities   148,203   880   (285)   (903)   147,895 Redeemable preferred stocks   1,493   20   –   (45)   1,468   $ 2,228,961 $ 26,598 $ (17,025) $ (27,305) $ 2,211,229   The available-for-sale tables include gross unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position. We sold available-for-sale securities with a fair value of $ 264.5 million, $ 114.8 million and $ 163.7 million in fiscal 2020, 2019 and 2018, respectively. The gross realized gains on these sales totaled $ 6.4 million, $ 2.0 million and $ 5.4 million in fiscal 2020, 2019 and 2018, respectively. We realized gross losses on these sales of $ 0.2 million, $ 0.2 million and $ 0.3 million in fiscal 2020, 2019 and 2018, respectively.   The unrealized losses of more than twelve months in the available-for-sale tables are considered temporary declines. We track each investment with an unrealized loss and evaluate them on an individual basis for other-than-temporary impairments, including obtaining corroborating opinions from third party sources, performing trend analysis and reviewing management’s future plans. Certain of these investments may have declines determined by management to be other-than-temporary and we recognized these write-downs through earnings. There were no write downs in fiscal 2020, 2019 and 2018. We reviewed our available-for-sale investments at the end of the first quarter of fiscal 2021 and noted an increase in the unrealized loss position of $50.2 million (unaudited). We reviewed credit ratings of the issuers of these securities and determined that each issuer was current on its scheduled interest, dividends or principal payments. We further reviewed the fair value of these securities a month later and observed that the unrealized loss had recovered by $23.4 million (unaudited). The investment portfolio primarily consists of corporate securities and obligations of states and political subdivisions. We believe we monitor our investments as appropriate. Our methodology of assessing other-than-temporary impairments is based on security-specific analysis as of the balance sheet date and considers various factors, including the length of time to maturity, the extent to which the fair value has been less than the cost, the financial condition and the near-term prospects of the issuer, and whether the debtor is current on its contractually obligated interest and principal payments. Nothing has come to management’s attention that would lead to the belief that any issuer would not have the ability to meet the remaining contractual obligations of the security, including payment at maturity. We have the ability and intent not to sell our fixed maturity and common stock investments for a period of time sufficient to allow us to recover our costs. The portion of other-than-temporary impairment related to a credit loss is recognized in earnings. The significant inputs utilized in the evaluation of mortgage backed securities credit losses include ratings, delinquency rates, and prepayment activity. The significant inputs utilized in the evaluation of asset backed securities credit losses include the time frame for principal recovery and the subordination and value of the underlying collateral. F- 20   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) There were no credit losses recognized in earnings for which a portion of an other-than-temporary impairment was recognized in accumulated other comprehensive loss for fiscal 2020, 2019 or 2018. The adjusted cost and estimated market value of available-for-sale investments by contractual maturity, were as follows:       March 31, 2020   March 31, 2019     Amortized Cost   Estimated Market Value   Amortized Cost   Estimated Market Value     (In thousands) Due in one year or less $ 128,747 $ 129,420 $ 71,987 $ 71,954 Due after one year through five years   547,821   566,934   541,195   540,658 Due after five years through te

Other Assets

Other Assets	12 Months Ended
	Mar. 31, 2020
Disclosure Text Block [Abstract]
Other Assets	Note 7.   Other Assets Other assets were as follows:     March 31,     2020   2019     (In thousands) Deposits (debt-related) $ 33,020 $ 30,408 Cash surrender value of life insurance policies   31,371   30,985 Deposits (real estate related)   7,565   16,961   $ 71,956 $ 78,354

Net Investment and Interest Inc

Net Investment and Interest Income	12 Months Ended
	Mar. 31, 2020
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,     2020   2019   2018     (In thousands) Fixed maturities $ 107,434 $ 99,348 $ 84,476 Real estate   7,304   5,538   5,344 Insurance policy loans   974   1,305   1,212 Mortgage loans   17,164   16,674   17,783 Short-term, amounts held by ceding reinsurers, net and other investments   9,807   (7,429)   3,098 Investment income   142,683   115,436   111,913 Less: investment expenses   (4,854)   (4,502)   (4,766) Investment income - related party, net eliminations   –   –   3,326 Net investment and interest income $ 137,829 $ 110,934 $ 110,473

Borrowings

Borrowings	12 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Borrowings	F- 22   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Note 9.   Borrowings Long-Term Debt Long-term debt was as follows:                   March 31,   2020 Rates (a)   Maturities   2020   2019                   (In thousands) Real estate loan (amortizing term)     2.36 %     2023 $ 92,913 $ 102,913 Senior mortgages 3.11 % 6.62 % 2021 - 2038   2,029,878   1,741,652 Real estate loans (revolving credit) 2.98 % 3.14 % 2022 - 2025   519,000   429,400 Fleet loans (amortizing term) 1.95 % 4.66 % 2020 - 2027   224,089   263,209 Fleet loans (revolving credit) 2.73 % 2.75 % 2022 - 2024   567,000   530,000 Finance/capital leases (rental equipment) 1.92 % 5.04 % 2020 - 2026   734,870   1,042,652 Finance liability (rental equipment) 2.63 % 4.22 % 2024 - 2027   398,834   – Other obligations 2.50 % 8.00 % 2020 - 2049   84,484   82,417 Notes, loans and finance/capital leases payable               $ 4,651,068 $ 4,192,243 Less: Debt issuance costs                 (29,777)   (28,920) Total notes, loans and finance/capital leases payable, net               $ 4,621,291 $ 4,163,323                         (a) Interest rate as of March 31, 2020, taking into account the effect of applicable hedging instruments         Real Estate Backed Loans Real Estate Loan Real Estate and certain of its subsidiaries and U-Haul Company of Florida are borrowers under a real estate loan (the “Real Estate Loan”).   The Real Estate Loan requires monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. The Real Estate Loan is secured by various properties owned by the borrowers.   The interest rate, per the provisions of the amended loan agreement, is the applicable London Inter-Bank Offer Rate (“LIBOR”) plus the applicable margin. As of March 31, 2020, the applicable LIBOR was 0.86 % and the applicable margin was 1.50 %, the sum of which was 2.36 %. 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 3.11 % and 6.62 %. 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- 23   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. 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 final maturity of the loans is between June 2022 and March 2025 . 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, 2020, the applicable LIBOR was between 1.58 % and 1.60 % and the margin was between 1.25 % and 1.40 %, the sum of which was between 2.85% and 3.10%. 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 $ 150.0 million, which can be increased to $ 300.0 million by bringing in other lenders. As of March 31, 2020, 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, 2020, the applicable LIBOR was 1.60 % and the margin was 1.38 %, the sum of which was 2.98 %. 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. In April 2020, the Company expanded the borrowing capacity to $ 200.0 million, extended the maturity to April 2023 and the margin increased to 2.25 %. 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 1.95 % and 4.66 %. 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, 2020, the applicable LIBOR was between 1.58 % and 1.60 %, and the margin was 1.15 %, the sum of which was between 2.73% and 2.75%. Only interest is paid on the loans until the last nine months of the respective loan terms when principal becomes due monthly. Finance/Capital Leases The Finance/Capital 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 on April 1, 2019. The historical capital lease balance was reclassified to Right-of-use 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. There were no new financing leases, as assessed under the new leasing guidance, entered into during fiscal 2020. F- 24   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 on April 1, 2019, 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 2.63 % to 4.22 %. These finance liabilities are collateralized by our rental fleet.   Other Obligations In February 2011, AMERCO and U.S. Bank, NA (the “Trustee”) entered into the U-Haul Investors Club ® Indenture.   AMERCO and the Trustee entered into this indenture to provide for the issuance of notes by us directly to investors over our proprietary website, uhaulinvestorsclub.com (“U-Notes ® ”). The U-Notes ® are secured by various types of collateral including, but not limited to, rental equipment and real estate.   U-Notes ® are issued in smaller series that vary as to principal amount, interest rate and maturity.   U-Notes ® are obligations of the Company and secured by the associated collateral; they are not guaranteed by any of the Company’s affiliates or subsidiaries. As of March 31, 2020, the aggregate outstanding principal balance of the U-Notes ® issued was $ 87.3 million, of which $ 2.8 million is held by our insurance subsidiaries and eliminated in consolidation. Interest rates range between 2.50 % and 8.00 % and maturity dates range between 2020 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, 2019, the advances had an aggregate balance of $ 60.0 million, for which Oxford pays fixed interest rates between 1.72 % and 2.95 % with maturities between March 30, 2020 and September 30, 2022. As of December 31, 2019, available-for-sale investments held with the FHLB totaled $ 117.9 million, of which $ 67.6 million were pledged as collateral to secure the outstanding advances. The balances of these advances are included within Liabilities from investment contracts on the condensed consolidated balance sheets. Annual Maturities of Notes, Loans and Finance/Capital Leases Payable The annual maturities of our notes, loans and finance/capital leases payable as of March 31, 2020 for the next five years and thereafter are as follows:     Years Ended March 31,

Interest on Borrowings

Interest on Borrowings	12 Months Ended
	Mar. 31, 2020
Interest Expense, Borrowings [Abstract]
Interest on Borrowings	F- 25   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,     2020   2019   2018     (In thousands) Interest expense $ 180,444 $ 150,609 $ 125,412 Capitalized interest   (23,517)   (12,733)   (6,466) Amortization of transaction costs   4,427   3,745   3,867 Interest expense resulting from cash flow hedges   (404)   824   3,893 Total interest expense   160,950   142,445   126,706   Interest paid in cash, including payments related to derivative contracts, amounted to $ 168.1 million, $ 149.8 million and $ 129.3 million for fiscal 2020, 2019 and 2018, respectively. Interest Rates Interest rates and our revolving credit borrowings were as follows:     Revolving Credit Activity       Years Ended March 31,       2020   2019   2018       (In thousands, except interest rates)   Weighted average interest rate during the year   3.31 % 3.39 % 2.48 % Interest rate at year end   2.86 % 3.60 % 2.84 % Maximum amount outstanding during the year $ 1,086,000 $ 959,400 $ 538,000   Average amount outstanding during the year $ 1,002,081 $ 699,415 $ 517,997   Facility fees $ 193 $ 374 $ 410

Derivatives

Derivatives	12 Months Ended
	Mar. 31, 2020
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, 2020   March 31, 2019     (In thousands) Interest rate contracts designated as hedging instruments         Assets $ – $ 139 Liabilities   8,214   – Notional amount (debt)   235,000   22,792   F- 26   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,     2020   2019   2018     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ 8,356 $ (633) $ (4,445) (Gain) loss reclassified from AOCI into income $ (401) $ 789 $ 3,893   Gains or losses recognized in income on derivatives are recorded as interest expense in the consolidated statements of operations.   During fiscal year 2020, we recognized a decrease in the fair value of our cash flow hedges of $ 6.3 million, net of taxes.   During fiscal year 2020, we reclassified $ 0.4 million from accumulated other comprehensive income (loss) (“AOCI”) to interest expense.   As of March, 31 2020, we expect to reclassify $ 0.4 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 market value on our balance sheet. At March 31, 2020 and 2019, these derivative hedges had a net market value of $ 5.9 million and $ 1.5 million, with notional amounts of $ 246.8   million and $ 284.0   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 call options are marked to fair value on each reporting date with the change in fair value, plus or minus, included 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, 2020
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 Market Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2019 $ (56,612) $ (7,259) $ 107 $ (2,934) $ (66,698) Foreign currency translation   9,377   –   –   –   9,377 Unrealized net gain on investments   –   97,943   –   –   97,943 Change in fair value of cash flow hedges   –   –   (6,301)   –   (6,301) Amounts reclassified into earnings on hedging activities   –   –   (2)   –   (2) Change in post retirement benefit obligaiton   –   –   –   333   333 Other comprehensive income (loss)   9,377   97,943   (6,303)   333   101,350 Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Mar. 31, 2020
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity	F- 27   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 2020 and 2019. Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               December 4, 2019 $ 0.50   December 19, 2019   January 6, 2020 August 22, 2019   0.50   September 9, 2019   September 23, 2019 March 6, 2019   0.50   March 21, 2019   April 4, 2019 December 5, 2018   0.50   December 20, 2018   January 7, 2019 August 23, 2018   0.50   September 10, 2018   September 24, 2018 June 6, 2018   0.50   June 21, 2018   July 5, 2018   On June 8, 2016, our stockholders’ approved the 2016 AMERCO Stock Option Plan (Shelf Stock Option Plan). As of March 31, 2020, no awards had been issued under this plan.

Provision for Taxes

Provision for Taxes	12 Months Ended
	Mar. 31, 2020
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,     2020   2019   2018     (In thousands) Pretax earnings:             U.S. $ 372,687 $ 466,175 $ 628,901 Non-U.S.   5,437   11,354   8,712 Total pretax earnings $ 378,124 $ 477,529 $ 637,613               Current provision (benefit)             Federal $ (373,817) $ (6,114) $ 21,780 State   (9,600)   3,420   6,471 Non-U.S.   949   1,375   1,412     (382,468)   (1,319)   29,663 Deferred provision (benefit)             Federal   307,846   94,961   (199,415) State   9,728   11,311   15,479 Non-U.S.   970   1,719   1,303     318,544   107,991   (182,633)               Provision for income tax expense (benefit) $ (63,924) $ 106,672 $ (152,970)               Income taxes paid (net of income tax refunds received) $ 6,859 $ 4,255 $ 68,671 F- 28   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,       2020   2019   2018       (in percentages)   Statutory federal income tax rate   21.00 % 21.00 % 31.55 % Increase (reduction) in rate resulting from:               Deferred tax liability revaluation   – % – % (58.25) % NOL tax rate benefit   (38.62) % – % – % State taxes, net of federal benefit   0.02 % 2.41 % 2.33 % Foreign rate differential   0.21 % 0.15 % – % Federal tax credits   (0.53) % (0.15) % (0.32) % Transition tax   – % (0.20) % 1.83 % Tax-exempt income   (0.17) % – % – % Dividend received deduction   (0.01) % (0.01) % (0.03) % Phase III tax   – % – % 0.63 % Other   1.19 % (0.86) % (1.73) % Actual tax expense (benefit) of operations   (16.91) % 22.34 % (23.99) %     Significant components of our deferred tax assets and liabilities were as follows:       March 31,     2020   2019 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 25,973 $ 90,061 Accrued expenses   105,171   105,727

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Mar. 31, 2020
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 2020, 2019 or 2018. 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 delivered 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 $ 10.3 million, $ 11.3 million and $ 11.4 million for fiscal 2020, 2019 and 2018, respectively, which are included in operating expenses in the consolidated statements of operations. F- 31   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Listed below is a summary of these financing arrangements as of fiscal year-end:     Outstanding as of   Interest Payments Financing Date   March 31, 2020   2020   2019   2018     (In thousands) June, 1991 $ – $ – $ 1 $ 1 July, 2009   –   9   17   26 February, 2016   –   229   190   242   Leveraged contributions to the Plan Trust during fiscal 2020, 2019 and 2018 were $ 5.6 million, $ 1.0 million and $ 1.0 million, respectively. In fiscal 2020, 2019 and 2018, the Company made non-leveraged contributions of $ 4.0 million, $ 5.2 and $ 11.0 million, respectively to the Plan Trust. In both fiscal 2020 and 2019, $ 0.0 million of dividends from unallocated shares were applied to debt. Shares held by the Plan were as follows:     Years Ended March 31,     2020   2019     (In thousands) Allocated shares   1,003   1,069 Unreleased shares - leveraged   –   16 Fair value of unreleased shares - leveraged $ – $ 6,019 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, 2020 and March 31, 2019, respectively. During fiscal 2020, we released for allocation 16,558 leveraged shares and 13,989 non-leveraged shares. As of March 31, 2020, it is estimated there will be no shares committed to be released. 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,     2020   2019   2018     (In thousands) Service cost for benefits earned during the period $ 1,055 $ 1,108 $ 1,073 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   964   943   869 Other components   90   70   58 Total other components of net periodic benefit costs   1,054   1,013   927 Net periodic postretirement benefit cost $ 2,109 $ 2,121 $ 2,000 F- 32   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued)   The fiscal 2020 and fiscal 2019 post retirement benefit liability included the following components:       Years Ended March 31,     2020   2019     (In thousands) Beginning of year $ 25,817 $ 23,316 Service cost for benefits earned during the period   1,055   1,108 Interest cost on accumulated post retirement benefit   964   943 Net benefit payments and expense   (93)   (979) Actuarial (gain) loss   (240)   1,429 Accumulated postretirement benefit obligation   27,503   25,817           Current liabilities   1,151   1,037 Non-current liabilities   26,352   24,780           Total post retirement benefit liability recognized in statement of financial position   27,503   25,817 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (3,447)   (3,890) Cumulative net periodic benefit cost (in excess of employer contribution) $ 24,056 $ 21,927   The discount rate assumptions in computing the information above were as follows:       Years Ended March 31,     2020 2019 2018     (In percentages)

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Mar. 31, 2020
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. 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. F- 34   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 Year Ended 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/capital leases payable $ 4,651,068 $ – $ 4,651,068 $ – $ 4,342,308 Total $ 4,651,068 $ – $ 4,651,068 $ – $ 4,342,308         Fair Value Hierarchy Year Ended March 31, 2019   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 224,785 $ – $ – $ 224,785 $ 224,785 Mortgage loans, net   225,829   –   –   225,829   225,829 Other investments   74,907   –   –   74,907   74,907 Total $ 525,521 $ – $ – $ 525,521 $ 525,521                                             Liabilities                     Notes, loans and finance/capital leases payable $ 4,192,243   – $ 4,192,243 $ – $ 4,192,243 Total $ 4,192,243 $ – $ 4,192,243 $ – $ 4,192,243 F- 35   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, 2020 and 2019, that are

Reinsurance and Policy Benefits

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable	12 Months Ended
	Mar. 31, 2020
Disclosure Text Block [Abstract]
Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable	F- 36   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 $ 125,000 .       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, 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   –   –   60,848   – % Total $ 191,573 $ 266 $ (66,971) $ 124,336                               Year ended December 31, 2017                       Life insurance in force $ 947,720 $ 248 $ 876,865 $ 1,824,337   48 % Premiums earned:                       Life $ 51,227 $ 4 $ 9,880 $ 61,103   16 % Accident and health   90,396   295   1,977

Leases

Leases	12 Months Ended
	Mar. 31, 2020
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 consolidated balance sheet dated March 31, 2020. Finance leases, which are comprised primarily of rental equipment leases, are included in ROU assets - financing, net, and notes, loans and finance/capital leases payable, net in our consolidated balance sheet dated March 31, 2020. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the expected remaining lease term. We use our incremental borrowing rate based on information available at commencement date including the rate for a fully collateralized loan that can either be fully amortizing or financed with a residual at the end of the lease term, for a borrower with similar credit quality in order to determine the present value of lease payments. Our lease terms may include options to extend or terminate the lease, which are included in the calculation of ROU assets when it is reasonably certain that we will exercise those options. Lease expense for lease payments is recognized on a straight-line basis over the lease term. F- 40   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 this standard 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. During fiscal 2020, we recognized new operating leases and ROU assets of $ 20.2 million. The standard also changed the manner by which we account for our equipment sale/leaseback transactions.   Based on our assessment, the lease transactions are classified as financing leases, and therefore the transactions do not qualify as a sale.   Pursuant to the guidance, new sale leaseback transactions that fail to qualify as a sale will be accounted for as a financial liability.   Please see Note 9, Borrowings, of the Notes to Consolidated Finanical Statements for additional information. The following table shows the components of our right-of-use assets, net:     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   116,072   –   116,072 Rental trucks   1,738,081   –   1,738,081 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         Finance   Operating   Weighted average remaining lease term (years)   4 Years   14 Years   Weighted average discount rate   3.5 % 4.6 %   For the last twelve months ended March 31, 2020, cash paid for leases included in our operating and financing cash flow activities were $ 25.9 million and $307.8 million, respectively. The components of lease costs, including leases of less than 12 months, were as follows:     Twelve Months Ended     March 31, 2020     (In thousands)       Operating lease costs $ 27,494       Finance lease cost:     Amortization of right-of-use assets $ 186,860 Interest on lease liabilities   30,901 Total finance lease cost $ 217,761 F- 41   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Maturities of lease liabilities were as follows:     Finance leases   Operating leases Year ending March 31,   (In thousands)           2021 $ 218,424 $ 23,782 2022   164,190   22,001 2023   124,160   21,238 2024   106,156   20,616 2025   75,502   9,701 Thereafter   46,438   64,806 Total lease payments   734,870   162,144 Less: imputed interest   –   (55,701) Present value of lease liabilities $ 734,870 $ 106,443   As previously disclosed in our 2019 Annual Report o Form 10-K and under the previous lease accounting standard, our operating and ground lease commitments for leases having terms of more than one year were as follows:     Total     (In thousands) Year-ended March 31:     2020 $ 20,852 2021   18,495 2022   16,750 2023   16,317 2024   15,736 Thereafter   54,683 Total $ 142,833   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 have adversely affected workforces, customers, consumer sentiment, economies and financial markets. During and subsequent to the fourth quarter of fiscal 2020, 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 depend upon numerous evolving factors that the Company is not able to predict at this time, including among others: customer initiated changes in behavior, actions that have been and continue to be taken by governmental entities, our workforce may be negatively impacted disrupting our ability to serve customers, any new information that may emerge concerning the severity and duration of COVID-19 and the reaction of capital markets. For April the two most significant effects that we have experienced are an approximate 30 % (unaudited) decline in self-moving equipment rental income along with a decrease of approximately $ 39.5 million (unaudited) in proceeds from the sales of rental equipment compared to April 2019.   The decline in equipment rental revenue has been improving in May (unaudited). 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 2021. F- 42

Contingencies

Contingencies	12 Months Ended
	Mar. 31, 2020
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 have adversely affected workforces, customers, consumer sentiment, economies and financial markets. During and subsequent to the fourth quarter of fiscal 2020, 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 depend upon numerous evolving factors that the Company is not able to predict at this time, including among others: customer initiated changes in behavior, actions that have been and continue to be taken by governmental entities, our workforce may be negatively impacted disrupting our ability to serve customers, any new information that may emerge concerning the severity and duration of COVID-19 and the reaction of capital markets. For April the two most significant effects that we have experienced are an approximate 30 % (unaudited) decline in self-moving equipment rental income along with a decrease of approximately $ 39.5 million (unaudited) in proceeds from the sales of rental equipment compared to April 2019.   The decline in equipment rental revenue has been improving in May (unaudited). 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 2021. F- 42   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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. We continue to examine the impact the CARES Act may have on our business. To date we have availed ourselves of the provisions related to deferring certain payroll taxes, carrybacks of net operating losses, and will utilize the technical corrections to tax deprecation methods.   We estimate that the net operating loss carrybacks combined with the depreciation adjustments for our fiscal 2020 federal income tax return will result in a refund of approximately $ 381 million, which 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 other litigation and claims arising out of the normal course of business. In management’s opinion, none of these other matters will have a material effect on our financial position and results of operations.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Mar. 31, 2020
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 Securities and Exchange Commission (“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. 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. In the past, we sold real estate and various self-storage properties to SAC Holdings, and such sales provided significant cash flows to us. SAC Holdings, Four SAC Self-Storage Corporation, Five SAC Self-Storage Corporation, Galaxy Investments, L.P. and 2015 SAC self-storage 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. F- 43   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Related Party Revenues     Years Ended March 31,     2020   2019   2018     (In thousands) U-Haul interest income revenue from Blackwater $ – $ – $ 3,326 U-Haul management fee revenue from Blackwater   24,014   23,986   23,577 U-Haul management fee revenue from Mercury   6,392   5,162   6,025   $ 30,406 $ 29,148 $ 32,928   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 $ 29.0 million, $ 30.0 million and $ 29.5 million from the above-mentioned entities during fiscal 2020, 2019 and 2018, 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,     2020   2019   2018     (In thousands) U-Haul lease expenses to Blackwater $ 2,631 $ 2,678 $ 2,684 U-Haul commission expenses to Blackwater   62,066   61,434   58,595   $ 64,697 $ 64,112 $ 61,279   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, 2020, 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 $ 24.0 million, expenses of $ 2.6 million and cash flows of $ 21.5 million during fiscal 2020. Revenues and commission expenses related to the Dealer Agreements were $ 293.6 million and $ 62.1 million, respectively for fiscal 2020. In December 2019, Real Estate completed the sale of two office buildings to Oxford at cost for approximately $ 15.0 million. Oxford assumed the debt securing the property of $ 11.5 million and paid the balance in cash. There were no gains on this transaction. Management determined that we do not have a variable interest pursuant to the VIE model under ASC 810 in the holding entities of Blackwater based upon management agreements which are with the individual operating entities; therefore, we are precluded from consolidating these entities. F- 44   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Related Party Assets     March 31,     2020   2019     (In thousands) U-Haul receivable from Blackwater $ 25,293 $ 25,158 U-Haul receivable from Mercury   9,893   7,234 Other (a)   (402)   (1,503)   $ 34,784 $ 30,889 (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,     2019   2018   2017     (In thousands) Repwest:             Audited statutory net income $ 28,614 $ 23,960 $ 16,328 Audited statutory capital and surplus   226,999   216,763   197,375 ARCOA:             Audited statutory net income   2,906   1,612   1,190 Audited statutory capital and surplus   12,851   9,390   7,991 Oxford:             Audited statutory net income   18,599   11,367   10,350 Audited statutory capital and surplus   223,264   203,723   195,931 CFLIC:             Audited statutory net income   8,043   8,735   8,062 Audited statutory capital and surplus   26,305   27,232   26,653 NAI:             Audited statutory net income   1,942   1,436   1,594

Statutory Financial Information

Statutory Financial Information of Insurance Subsidiaries	12 Months Ended
	Mar. 31, 2020
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,     2019   2018   2017     (In thousands) Repwest:             Audited statutory net income $ 28,614 $ 23,960 $ 16,328 Audited statutory capital and surplus   226,999   216,763   197,375 ARCOA:             Audited statutory net income   2,906   1,612   1,190 Audited statutory capital and surplus   12,851   9,390   7,991 Oxford:             Audited statutory net income   18,599   11,367   10,350 Audited statutory capital and surplus   223,264   203,723   195,931 CFLIC:             Audited statutory net income   8,043   8,735   8,062 Audited statutory capital and surplus   26,305   27,232   26,653 NAI:             Audited statutory net income   1,942   1,436   1,594 Audited statutory capital and surplus   13,371   12,817   12,674   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, 2019 that could be distributed as ordinary dividends was $ 22.7 million. The statutory surplus for Oxford at December 31, 2019 that could be distributed as ordinary dividends was $ 18.6 million. Repwest paid a dividend of $ 21.6 million to AMERCO during fiscal 2020. Repwest did not pay a dividend to AMERCO in fiscal 2019 or 2018. Oxford did not pay a dividend to AMERCO in fiscal 2020, 2019 or 2018, respectively. Restricted net assets for our insurance subsidiaries were $ 98.5 million and $ 130.2 million as of March 31, 2020 and 2019, respectively. F- 45   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, 2020
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, 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       United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2018             Total revenues $ 3,435,821 $ 165,293 $ 3,601,114 Depreciation and amortization, net of gains on disposal   363,826   8,521   372,347 Interest expense   123,777   2,929   126,706 Pretax earnings   628,901   8,712   637,613 Income tax expense (benefit)   (155,685)   2,715   (152,970) Identifiable assets   10,425,299   322,123   10,747,422

Consolidating Financial Informa

Consolidating Financial Information by Industry Segment	12 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Consolidating Financial Information by Industry Segment	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. F- 47   amerco and consolidated subsidiaries notes to condensed consolidated financial statements – (continued)   Note 22A. Financial Information by Consolidating Industry Segment: Consolidating balance sheets by industry segment as of March   31, 2020 are as follows:     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

Revenue Recognition

Revenue Recognition	12 Months Ended
	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Note 23.   Revenue Recognition Revenue Recognized in Accordance with Topic 606 On April 1, 2018, we adopted ASC Topic 606, Revenue from Contracts with Customers (Topic 606) , on a modified retrospective basis. The standard 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 expanded disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. Due to insignificant changes in our revenue recognition pattern for applicable revenue streams as a result of the updated guidance, there was no cumulative effect recorded.   Additionally, we elected to use the practical expedient for contracts that begin and end within the same reporting period in applying the updated guidance to our applicable revenue streams. The adoption of the standard did not have a material effect on our Consolidated Balance Sheets, Consolidated Statements of Operations, or Consolidated Statements of Cash Flows. We enter into contracts that may include various combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. Revenue is recognized net of amounts collected from customers for taxes, such as sales tax, and remitted to the applicable taxing authorities. We account for a contract under Topic 606 when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For contracts scoped into this standard, revenue is recognized when (or as) the performance obligations are satisfied by means of transferring goods or services to the customer as applicable to each revenue stream as discussed below.   There were no material contract assets or liabilities as of March 31, 2020 and March 31, 2019. Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. The performance obligations identified for this portfolio of contracts include moving and storage product sales, installation services and/or propane sales. Each of these performance obligations has an observable stand-alone selling price. We concluded that the performance obligations identified are satisfied at a point in time under Topic 606, which is consistent with the timing of our revenue recognition under legacy guidance. The basis for this conclusion is that the customer does not receive the product/propane or benefit from the installation services until the related performance obligation is satisfied. These products/services being provided have an alternative use as they are not customized and can be sold/provided to any customer. In addition, we only have the right to receive payment once the products have been transferred to the customer or the installation services have been completed. Although product sales have a right of return policy, our estimated obligation for future product returns is not material to the financial statements at this time. Property management fees are recognized over the period that agreed-upon services are provided. The performance obligation for this portfolio of contracts is property management services, which represents a series of distinct days of service, each of which is comprised of activities that may vary from day to day. However, those tasks are activities to fulfill the property management services and are not separate promises in the contract. We determined that each increment of the promised service is distinct in accordance with paragraph 606-10-25-19. This is because the customer can benefit from each increment of service on its own and each increment of service is separately identifiable because no day of service significantly modifies or customizes another and no day of service significantly affects either the entity’s ability to fulfill another day of service or the benefit to the customer of another day of service. As such, we concluded that the performance obligation is satisfied over time under Topic 606, which is consistent with the timing of our revenue recognition under legacy guidance for the Management Fee component of the compensation received in exchange for the service. Additionally, in certain contracts the Company has the ability to earn an incentive fee based on operational results. Historically, these fees have been recognized once fully determinable. Under Topic 606, we measure and recognize the progress toward completion of the performance obligation on a quarterly basis using the most likely amount method to determine an accrual for the incentive fee portion of the compensation received in exchange for the property management service. The variable consideration recognized is subject to constraints due to a range of possible consideration amounts based on actual operational results. The amount accrued in the fourth quarter of fiscal 2020 did not have a material effect on our financial statements. Other revenue consists of numerous services or rentals, of which U-Box contracts and service fees from Moving Help are the main components. The performance obligations identified for U-Box contracts F- 61       are fees for rental, storage and shipping of U-Box containers to a specified location, each of which are distinct. A contract may be partially within the scope of Topic 606 and partially within the scope of other topics. The rental and storage obligations in U-Box contracts meet the definition of a lease in Topic 842, while the shipping obligation represents a contract with a customer accounted for under Topic 606. Therefore, we allocate the total transaction price between the performance obligations of storage fees and rental fees and the shipping fees on a standalone selling price basis. U-Box shipping fees are collected once the shipment is in transit. Shipping fees in U-Box contracts are set at the initiation of the contract based on the shipping origin and destination, and the performance obligation is satisfied over time under Topic 606, which is consistent with the timing of our revenue recognition under legacy guidance. U-Box shipping contracts span over a relatively short period of time, and the majority of these contracts begin and end within the same fiscal year. Moving Help services fees are recognized in accordance with Topic 606. Moving Help services are generated as we provide a neutral venue for the connection between the service provider and the customer for agreed upon services. We do not control the specified services provided by the service provider before that service is transferred to the customer. Revenue Recognized in Accordance withTopic 842/840 The Company’s self-moving rental revenues meet the definition of a lease pursuant to the guidance in ASU 2016-02, 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 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. 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-storage revenues are recognized as earned over the contract period based upon the number of paid storage contract days. We lease portions of our operating properties to tenants under agreements that are classified as operating leases. We recognize the total minimum lease payments provided for under the leases on a straight-line basis over the lease term. Generally, under the terms of our leases, the majority of our rental expenses, including common area maintenance, real estate taxes and insurance, are recovered from our customers. The following table summarizes the minimum lease payments due from our customers and operating property tenants on leases for the next five years and thereafter:     Year Ended March 31,     2021   2022   2023   2024   2025   Thereafter           (In thousands)                           Self-moving equipment rentals $ 2,139 $ – $ – $ – $ – $ – Property lease revenues   20,715   16,927   13,250   9,834   7,102   58,379 Total $ 22,854 $ 16,927 $ 13,250 $ 9,834 $ 7,102 $ 58,379   Revenue Recognized in Accordance with Other Topics Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Life insurance premiums are recognized in accordance with existing guidance in Topic 944 – Financial Services – Insurance. Property and casualty insurance premiums are recognized as revenue over the policy periods. Interest and investment income are recognized as earned. Property and casualty premiums are recognized in accordance with existing guidance in Topic 944 – Financial Services – Insurance. F- 62     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 Topic 825 – Financial Instruments.   In the following tables, the revenue is disaggregated by timing of revenue recognition:     Years Ended March 31,     2020   2019   2018           (In thousands)               Revenues recognized over time $ 147,565 $ 2,814,732 $ 2,617,990 Revenues recognized at a point in time   309,804   305,408   301,152 Total revenues recognized under ASC 606   457,369   3,120,140   2,919,142               Revenues recognized under ASC 842 or 840   3,182,902   406,070   353,924 Revenues recognized under ASC 944   200,768   131,563   217,575 Revenues recognized under ASC 320   137,829   110,934   110,473 Total revenues $ 3,978,868 $ 3,768,707 $ 3,601,114 In the above tables, the revenues recognized over time include self-moving equipment rentals, property management fees, the shipping fees associated with U-Box rentals and a portion of other revenues for fiscal 2019 and 2018, respectively. Whereas revenues recognized at a point in time include self-moving and self-storage products and service sales and a portion of other revenues. Self-moving equipment rentals are now in revenues recognized under ASC 842/840 as of April 1, 2019. 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.   Subsequent Events Our management has evaluated subsequent events occurring after March 31, 2020. We do not believe any other subsequent events ha

Subsequent Events

Subsequent Events	12 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Note 24.   Subsequent Events Our management has evaluated subsequent events occurring after March 31, 2020. We do not believe any other subsequent events have occurred that would require further disclosure or adjustment to our financial statements other than as stated below. In April 2020, Oxford paid AMERCO a cash dividend of $ 18.6 million. In April 2020, we expanded our corporate revolver by an additional $ 50.0 million and fully borrowed that as well. In May 2020, we entered into a one-year term loan totaling $ 200.0 million at a rate of one-month LIBOR plus a 2.00 % margin. This loan is secured by the Company’s claims for federal income tax refund, to further strengthen our liquidity position.

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information of Amerco	12 Months Ended
	Mar. 31, 2020
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,     2020   2019     (In thousands) ASSETS Cash and cash equivalents $ 294,528 $ 428,950 Investment in subsidiaries   2,758,509   2,474,671 Related party assets   1,734,358   1,424,274 Other assets   502,064   120,896 Total assets $ 5,289,459 $ 4,448,791           LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities:         Other liabilities $ 1,068,291 $ 754,115     1,068,291   754,115 Stockholders' equity:         Preferred stock   –   – Common stock   10,497   10,497 Additional paid-in capital   454,029   453,536 Accumulated other comprehensive income (loss)   35,100   (68,459) Retained earnings:         Beginning of period   3,976,752   3,635,351 Adjustment for adoption of ASU 2016-01   –   9,724 Net earnings   442,048   370,857 Dividends   (19,608)   (39,180) End of period   4,399,192   3,976,752           Cost of common shares in treasury   (525,653)   (525,653) Cost of preferred shares in treasury   (151,997)   (151,997) Total stockholders' equity   4,221,168   3,694,676 Total liabilities and stockholders' equity $ 5,289,459 $ 4,448,791 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,     2020   2019   2018     (In thousands, except share and per share data) Revenues:             Net interest income and other revenues $ 6,586 $ 8,601 $ 4,606 Expenses:             Operating expenses   10,622   8,840   7,003 Other expenses   96   93   91 Total expenses   10,718   8,933   7,094 Equity in earnings of subsidiaries   205,940   279,589   681,786 Interest income   130,670   112,649   120,549 Pretax earnings   332,478   391,906   799,847 Income tax benfefit (expense)   109,570   (21,049)   (9,264) Earnings available to common shareholders $ 442,048 $ 370,857 $ 790,583 Basic and diluted earnings per common share $ 22.55 $ 18.93 $ 40.36 Weighted average common shares outstanding: Basic and diluted   19,603,708   19,592,048   19,588,889 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,     2020   2019   2018     (In thousands)               Net earnings $ 442,048 $ 370,857 $ 790,583 Other comprehensive income (loss)   101,350   (62,075)   37,873 Total comprehensive income $ 543,398 $ 308,782 $ 828,456 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,     2020   2019   2018     (In thousands) Cash flows from operating activities:

Notes to Condensed Financial In

Notes to Condensed Financial Information for Amerco Only	12 Months Ended
	Mar. 31, 2020
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, 2020 and March 31, 2019, 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. 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. In determining if and when a decline in market value below carrying value is an other-than-temporary impairment, management makes certain assumptions or judgments in its assessment including but not limited to: our ability to hold the security, quoted market prices, dealer quotes, discounted cash flows, industry factors, financial factors, and issuer specific information. Other-than-temporary impairments, to the extent of the decline, as well as realized gains or losses on the sale or exchange of investments are recognized in the current period operating results. F- 11   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 possible losses and any unamortized premium or discount. 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,     2020   2019     (In thousands) Truck and trailer parts and accessories (a) $ 88,138 $ 94,344 Hitches and towing components (b)   23,070   20,113 Moving supplies and propane (b)   11,824   10,356 Subtotal   123,032   124,813 Less: LIFO reserves   (18,886)   (18,987) Less: excess and obsolete reserves   (3,063)   (2,322) Total $ 101,083 $ 103,504           (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. 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, 2020 and 2019. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $18.9 million and $19.0 million higher as of March 31, 2020 and 2019, respectively. In fiscal 2020, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.1 million. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 $ 27.1 million, $ 27.0 million and $ 11.8 million during fiscal 2020, 2019 and 2018, 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 $ 27.7 million and $ 21.0 million in fiscal 2020 and 2019, 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 $ 69.6 million and $ 53.5 million for fiscal 2020 and 2019, 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 uncollectible accounts. F- 13   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 Current conditions affecting claim settlements Future economic conditions including inflation F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 $ 410.1 million and $ 407.9 million of liabilities related to these programs as of March 31, 2020 and 2019, 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, 2020 and 2019, the consolidated balance sheets include liabilities of $ 15.7 million and $ 15.6 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 $ 13.7 million, $ 10.6 million and $ 8.1 million in fiscal 2020, 2019 and 2018, 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, 2019 and 2018, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.8 million and $ 19.1 million, respectively on the consolidated balance sheet and amortization expense totaled $ 5.5 million, $ 3.7 million and $ 3.7 million for the periods ended December 31, 2019, 2018 and 2017, 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 fut
Amerco [Member]
1. Summary of Significant Accounting Policies	CONDENSED FINANCIAL INFORMATION OF AMERCO NOTES TO CONDENSED FINANCIAL INFORMATION March 31, 2020, 2019, and 2018 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 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, 2020
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, 2020   (In thousands) 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                       Year ended March 31, 2018                     Allowance for doubtful accounts                     (deducted from trade receivable) $ 585 $ 886 $ – $ (929) $ 496 Allowance for obsolescence                     (deducted from inventory) $ 2,050 $ 3,279 $ – $ – $ 5,329 Allowance for LIFO                     (deducted from inventory) $ 14,340 $ 1,786 $ – $ – $ 16,126 Allowance for probable losses

Schedule V - Supplemental Infor

Schedule V - Supplemental Information (for Property-Casualty Insurance Operations)	12 Months Ended
	Dec. 31, 2019
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, 2019, 2018, AND 2017   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) 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 2018   Consolidated property casualty entity   –   233,554   –   70   57,100   14,079   15,749   233   –   17,366   57,123   (1)The earned and written premiums are reported net of intersegment transactions. There were $ 3.1 million, $ 2.8 million and $ 2.3 million in written premiums and $ 2.8 million, $ 2.6 million and $ 1.7 million in earned premiums eliminated for the year ended December 31, 2019, 2018 and 2017, respectively. (2) Net Investment Income excludes net realized (gains) losses   on investments of ($ 0.4 ) million, ($ 3.0 ) million and ($ 1.7 ) million for the years ended December 31, 2019, 2018 and 2017, respectively .

Accounting Policies (Policy Tex

Accounting Policies (Policy Text Block)	12 Months Ended
	Mar. 31, 2020
Policy Text Block [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with the generally accepted accounting principles (“GAAP”) in the United States requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. The accounting policies that we deem most critical to us and that require management’s most difficult and subjective judgments include the principles of consolidation, the recoverability of property, plant and equipment, the adequacy of insurance reserves, the recognition and measurement of impairments for investments accounted for under ASC 320 - Investments - Debt and Equity Securities and the recognition and measurement of income tax assets and liabilities. The actual results experienced by us may materially differ from management’s estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents We consider cash equivalents to be highly liquid debt securities with insignificant interest rate risk with original maturities from the date of purchase of three months or less. Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash deposits. Accounts at each United States financial institution are insured by the Federal Deposit Insurance Corporation up to $ 250,000 . Accounts at each Canadian financial institution are insured by the Canada Deposit Insurance Corporation up to $ 100,000 CAD per account. As of March 31, 2020 and March 31, 2019, we held cash equivalents in excess of these insured limits. To mitigate this risk, we select financial institutions based on their credit ratings and financial strength.
Investments	Investments Fixed Maturities and Marketable Equities. Fixed maturity investments consist of either marketable debt, equity or redeemable preferred stocks. As of the balance sheet dates, all of our investments in these securities were classified as available-for-sale. Available-for-sale investments are reported at fair value, with unrealized gains or losses recorded net of taxes and applicable adjustments to deferred policy acquisition costs in stockholders’ equity. 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. In determining if and when a decline in market value below carrying value is an other-than-temporary impairment, management makes certain assumptions or judgments in its assessment including but not limited to: our ability to hold the security, quoted market prices, dealer quotes, discounted cash flows, industry factors, financial factors, and issuer specific information. Other-than-temporary impairments, to the extent of the decline, as well as realized gains or losses on the sale or exchange of investments are recognized in the current period operating results. F- 11   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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 possible losses and any unamortized premium or discount. 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	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 Inventories and parts, net were as follows:     March 31,     2020   2019     (In thousands) Truck and trailer parts and accessories (a) $ 88,138 $ 94,344 Hitches and towing components (b)   23,070   20,113 Moving supplies and propane (b)   11,824   10,356 Subtotal   123,032   124,813 Less: LIFO reserves   (18,886)   (18,987) Less: excess and obsolete reserves   (3,063)   (2,322) Total $ 101,083 $ 103,504           (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. 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, 2020 and 2019. Had we utilized the first-in first-out method (“FIFO”), stated inventory balances would have been $18.9 million and $19.0 million higher as of March 31, 2020 and 2019, respectively. In fiscal 2020, the negative effect on income due to liquidation of a portion of the LIFO inventory was $ 0.1 million. F- 12   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued)
Property, Plant and Equipment	Property, Plant and Equipment Our Property, plant and equipment is stated at cost. Interest expense, if any, incurred during the initial construction of buildings is considered part of cost. Depreciation is computed for financial reporting purposes using the straight line or an accelerated method based on a declining balance formula over the following estimated useful lives: rental equipment 2-20 years and buildings and non-rental equipment 3-55 years. Routine maintenance costs are charged to operating expense as they are incurred. Gains and losses on dispositions of property, plant and equipment, other than real estate (“personal property”), are netted against depreciation expense when realized. The net amount of gains, netted against depreciation expense, were $ 27.1 million, $ 27.0 million and $ 11.8 million during fiscal 2020, 2019 and 2018, 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 $ 27.7 million and $ 21.0 million in fiscal 2020 and 2019, 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 $ 69.6 million and $ 53.5 million for fiscal 2020 and 2019, respectively and is included in Investments, other.
Receivables	Receivables Trade receivables include trade accounts from moving and self-storage customers and dealers, insurance premiums and amounts due from re-insurers, less management’s estimate of uncollectible accounts. F- 13   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) 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	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 Current conditions affecting claim settlements Future economic conditions including inflation F- 14   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) We have reserved each claim based upon the accumulation of current claim costs projected through each claimant’s life expectancy and then adjusted for applicable reinsurance arrangements.   Management reviews each claim bi-annually or more frequently, if there are changes in facts or circumstances to determine if the estimated life-time claim costs have increased and then adjusts the reserve estimate accordingly at that time.   We have factored in an estimate of what the potential cost increases could be in our IBNR liability.   We have not assumed settlement of the existing claims in calculating the reserve amount, unless it is in the final stages of completion. Continued increases in claim costs, including medical inflation and new treatments and medications could lead to future adverse development resulting in additional reserve strengthening.   Conversely, settlement of existing claims or if injured workers return to work or expire prematurely, could lead to future positive development.
Self-Insurance Reserves	Self-Insurance Reserves U-Haul retains the risk for certain public liability and property damage programs related to our rental equipment. The consolidated balance sheets include $ 410.1 million and $ 407.9 million of liabilities related to these programs as of March 31, 2020 and 2019, 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, 2020 and 2019, the consolidated balance sheets include liabilities of $ 15.7 million and $ 15.6 million, respectively, related to medical plan benefits we provide for eligible employees. We estimate this liability based on actual claims outstanding as of the balance sheet date as well as an actuarial estimate of IBNR claims. These amounts are recorded in Accounts payable and accrued expenses on the consolidated balance sheets.
Revenue Recognition	Revenue Recognition Self-moving rentals are recognized for the period that trucks and moving equipment are rented. Self-storage revenues, based upon the number of paid storage contract days, are recognized as earned during the period.   Sales of self-moving and self-storage related products are recognized at the time that title passes and the customer accepts delivery. Property and casualty insurance premiums are recognized as revenue over the policy periods. Traditional life and Medicare supplement insurance premiums are recognized as revenue over the premium-paying periods of the contracts when due from the policyholders. For products where premiums are due over a significantly shorter duration than the period over which benefits are provided, such as our single premium whole life product, premiums are recognized when received and excess profits are deferred and recognized in relation to the insurance in force. Interest and investment income are recognized as earned. Amounts collected from customers for sales tax are recorded on a net basis. Please see Note 23, Revenue Recognition, of the Notes to Consolidated Financial Statements.
Advertising	Advertising All advertising costs are expensed as incurred. Advertising expense was $ 13.7 million, $ 10.6 million and $ 8.1 million in fiscal 2020, 2019 and 2018, respectively.
Deferred Policy Acquisition Cost	Deferred Policy Acquisition Costs Commissions and other costs that fluctuate with and are primarily related to the successful acquisition or renewal of certain insurance premiums are deferred. For our Life Insurance’s life and health insurance products, these costs are amortized, with interest, in relation to revenue such that costs are realized as a constant percentage of revenue. For its annuity insurance products the costs are amortized, with interest, in relation to the present value of actual and expected gross profits. 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, 2019 and 2018, the Sales Inducement Asset included with Deferred Policy Acquisition Costs amounted to $ 16.8 million and $ 19.1 million, respectively on the consolidated balance sheet and amortization expense totaled $ 5.5 million, $ 3.7 million and $ 3.7 million for the periods ended December 31, 2019, 2018 and 2017, respectively.
Environmental Costs	Environmental Costs Liabilities are recorded when environmental assessments and remedial efforts, if applicable, are probable and the costs can be reasonably estimated. The amount of the liability is based on management’s best estimate of undiscounted future costs. Certain recoverable environmental costs related to the removal of underground storage tanks or related contamination are capitalized and amortized over the estimated useful lives of the properties. These costs are capitalized if they improve the safety or efficiency of the property or are incurred in preparing the property for sale.
Income Taxes	Income Taxes 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.
Comprehensive Income (Loss)	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	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	Adoption of New Accounting Pronouncements On April 1, 2019, we adopted Accounting Standards Codification Topic 842, which require a lessee to recognize all leases with terms greater than 12 months on their balance sheet as a liability for its lease obligation, measured at the present value of lease payments not yet paid, and a corresponding asset representing its right to use the underlying asset over the lease term. The new leasing standard does not significantly change a lessee’s recognition, measurement and presentation of expenses and cash flows. Additionally, Topic 842 aligns key aspects of lessor accounting with the new revenue recognition guidance in Topic 606 (see   Note 23, Revenue Recognition) and expands disclosure of key information about leasing arrangements in an attempt to help financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases . We have determined portions of the vehicle rental contracts that convey the right to control the use of identified assets are within the scope of the accounting guidance contained in the new leasing standard. As described in Note 23, Revenue Recognition, the Company’s rental related revenues are accounted for under the revenue accounting standard Topic 606. Topic 842 requires leases to be classified as either operating or finance, with lease classification determined in a manner similar to the former lease guidance. The basic principle is that leases of all types convey the right to direct the use and obtain substantially all the economic benefits of an identified asset, meaning they create an asset and liability for lessees. Lessees classify leases as either finance leases (comparable to former capital leases) or operating leases. Costs for a finance lease are split between amortization and interest expense, with operating leases reporting a single lease expense. F- 16   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) Topic 842 substantially changed the accounting for sale-leasebacks going forward, where we are to assess if the contract qualifies as a sale under ASC 606. 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. As all former sale-leasebacks have been accounted for as a sale, we did not reassess any former sale-leaseback transactions. We adopted the new leasing standard using the Effective Date Approach, which allows entities to only apply the new lease standard in the year of adoption. We elected the available practical expedients for existing or expired contracts of lessees and lessors wherein the Company is not required to reassess whether such contracts contain leases, the lease classification or the initial direct costs. Additionally, we elected as accounting policies to not recognize right of use assets or lease liabilities for short-term leases (i.e. those with a term of 12 months or less) and to combine lease and non-lease components in the contract for both lessee and lessor arrangements.   Adoption of this standard resulted in most of our operating lease commitments being recognized as operating lease liabilities and right-of-use (“ROU”) assets. Please see Note 18, Leases, of the Notes to Consolidated Financial Statements. On April 10, 2020, the FASB issued a question-and-answer document that allows entities to elect not evaluate whether a concession provided by a lessor to a lessee in response to COVID-19 is a lease modification. An entity that makes this election may then elect to apply the lease modification guidance to that relief or account for the concession as if it were contemplated in the existing contract. On April 1, 2019, the Company adopted ASU 2017-08, Receivables – Nonrefundable Fees and Other Cost (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities. These amendments shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The adoption of the standard did not have a material impact on our consolidated financial statements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). 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. This update is effective for public companies for annual reporting periods beginning after December 15, 2019. In November 2019, the FASB released ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, which clarified narrow issues within ASU 2016-13. Specifically, the four main clarifications include: expected recoveries for purchased financial assets with credit deterioration; transition relief for troubled debt restructurings; disclosures for accrued interest receivables; and financial assets backed by collateral maintenance provisions. The Company has completed the development of the implementation plan and is in the process of model development. The Company is evaluating whether ASU 2016-13 will have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB adopted 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 amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 31, 2020. We are currently in the process of evaluating the impact of the adoption of this amendment 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. F- 17   amerco and consolidated subsidiaries notes to consolidated financial statements – (continued) In August 2018, the FASB issued 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. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In August 2018, the FASB issued 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. ASU 2018-14 is effective for fiscal years ending after December 15, 2020. We are currently evaluating the impact of this standard on our consolidated financial statements. 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 Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the 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 these standards on our consolidated financial statements. From time to time, new accounting pronouncements are issued by the FASB or the SEC that are adopted by us as of the specified effective date. Unless otherwise discussed, these ASUs entail technical corrections to existing guidance or affect guidance related to specialized industries or entities and therefore will have minimal, if any, impact on our financial position or results of operations upon adoption.

Accounting Policies (Table Text

Accounting Policies (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Inventory Disclosure [Abstract]
Inventories, net	March 31,     2020   2019     (In thousands) Truck and trailer parts and accessories (a) $ 88,138 $ 94,344 Hitches and towing components (b)   23,070   20,113 Moving supplies and propane (b)   11,824   10,356 Subtotal   123,032   124,813 Less: LIFO reserves   (18,886)   (18,987) Less: excess and obsolete reserves   (3,063)   (2,322) Total $ 101,083 $ 103,504           (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, 2020
Reinsurance Recoverables and Trade Receivables, Net [Abstract]
Reinsurance Recoverables and Trade Receivables, Net	March 31,     2020   2019     (In thousands) Reinsurance recoverable $ 89,020 $ 99,615 Trade accounts receivable   59,394   90,786 Paid losses recoverable   624   2,333 Accrued investment income   25,744   25,142 Premiums and agents' balances   1,582   1,545 Independent dealer receivable   1,015   390 Other receivables   9,828   5,523     187,207   225,334 Less: Allowance for doubtful accounts   (535)   (549)   $ 186,672 $ 224,785

Investments (Table Text Block)

Investments (Table Text Block)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
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   Estimated Market 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	Amortized Cost   Gross Unrealized Gains   Gross Unrealized Losses More than 12 Months   Gross Unrealized Losses Less than 12 Months   Estimated Market Value           (In thousands) U.S. treasury securities and government obligations $ 136,010 $ 2,409 $ (2,104) $ (447) $ 135,868 U.S. government agency mortgage-backed securities   31,101   433   (146)   (19)   31,369 Obligations of states and political subdivisions   298,955   8,079   (233)   (905)   305,896 Corporate securities   1,613,199   14,777   (14,257)   (24,986)   1,588,733 Mortgage-backed securities   148,203   880   (285)   (903)   147,895 Redeemable preferred stocks   1,493   20   –   (45)   1,468   $ 2,228,961 $ 26,598 $ (17,025) $ (27,305) $ 2,211,229
Adjusted Cost and Estimated Market Value of Available-for-sale Investments	March 31, 2020   March 31, 2019     Amortized Cost   Estimated Market Value   Amortized Cost   Estimated Market Value     (In thousands) Due in one year or less $ 128,747 $ 129,420 $ 71,987 $ 71,954 Due after one year through five years   547,821   566,934   541,195   540,658 Due after five years through ten years   636,036   678,636   621,031   614,485 Due after ten years   832,334   897,371   845,052   834,769     2,144,938   2,272,361   2,079,265   2,061,866                   Mortgage backed securities   187,784   193,687   148,203   147,895 Redeemable preferred stocks   1,493   1,565   1,493   1,468   $ 2,334,215 $ 2,467,613 $ 2,228,961 $ 2,211,229
Available for sale equity investments	March 31, 2020   March 31, 2019     Amortized Cost   Estimated Market Value   Amortized Cost   Estimated Market Value     (In thousands) Common stocks $ 9,775 $ 20,015 $ 10,123 $ 17,379 Non-redeemable preferred stocks   5,076   5,110   7,451   6,789   $ 14,851 $ 25,125 $ 17,574 $ 24,168
Carrying Value of Other Investments	March 31,     2020   2019     (In thousands) Mortgage loans, net $ 262,688 $ 225,829 Short-term investments   6,995   5,546 Real estate   69,569   53,519 Policy loans   11,212   10,491 Other equity investments   9,909   5,351   $ 360,373 $ 300,736

Other Assets (Table Text Block)

Other Assets (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Other Assets [Abstract]
Other Assets	March 31,     2020   2019     (In thousands) Deposits (debt-related) $ 33,020 $ 30,408 Cash surrender value of life insurance policies   31,371   30,985 Deposits (real estate related)   7,565   16,961   $ 71,956 $ 78,354

Net Investment and Interest I_2

Net Investment and Interest Income (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Table Text Block [Abstract]
Net Investment and Interest Income	Years Ended March 31,     2020   2019   2018     (In thousands) Fixed maturities $ 107,434 $ 99,348 $ 84,476 Real estate   7,304   5,538   5,344 Insurance policy loans   974   1,305   1,212 Mortgage loans   17,164   16,674   17,783 Short-term, amounts held by ceding reinsurers, net and other investments   9,807   (7,429)   3,098 Investment income   142,683   115,436   111,913 Less: investment expenses   (4,854)   (4,502)   (4,766) Investment income - related party, net eliminations   –   –   3,326 Net investment and interest income $ 137,829 $ 110,934 $ 110,473

Borrowings (Table Text Block)

Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Debt Instruments [Abstract]
Long-Term Debt	March 31,   2020 Rates (a)   Maturities   2020   2019                   (In thousands) Real estate loan (amortizing term)     2.36 %     2023 $ 92,913 $ 102,913 Senior mortgages 3.11 % 6.62 % 2021 - 2038   2,029,878   1,741,652 Real estate loans (revolving credit) 2.98 % 3.14 % 2022 - 2025   519,000   429,400 Fleet loans (amortizing term) 1.95 % 4.66 % 2020 - 2027   224,089   263,209 Fleet loans (revolving credit) 2.73 % 2.75 % 2022 - 2024   567,000   530,000 Finance/capital leases (rental equipment) 1.92 % 5.04 % 2020 - 2026   734,870   1,042,652 Finance liability (rental equipment) 2.63 % 4.22 % 2024 - 2027   398,834   – Other obligations 2.50 % 8.00 % 2020 - 2049   84,484   82,417 Notes, loans and finance/capital leases payable               $ 4,651,068 $ 4,192,243 Less: Debt issuance costs                 (29,777)   (28,920) Total notes, loans and finance/capital leases payable, net               $ 4,621,291 $ 4,163,323                         (a) Interest rate as of March 31, 2020, taking into account the effect of applicable hedging instruments
Annual Maturities of Notes, Loans and Leases Payable	Years Ended March 31,     2021   2022   2023   2024   2025   Thereafter   Total     (In thousands) Notes, loans and finance/capital leases payable, secured $ 459,184 $ 510,933 $ 1,011,688 $ 755,025 $ 393,498 $ 1,520,740 $ 4,651,068

Interest on Borrowings (Table T

Interest on Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Interest Expense, Borrowings [Abstract]
Components of interest expense	Years Ended March 31,     2020   2019   2018     (In thousands) Interest expense $ 180,444 $ 150,609 $ 125,412 Capitalized interest   (23,517)   (12,733)   (6,466) Amortization of transaction costs   4,427   3,745   3,867 Interest expense resulting from cash flow hedges   (404)   824   3,893 Total interest expense   160,950   142,445   126,706
Interest rates and company borrowings	Revolving Credit Activity       Years Ended March 31,       2020   2019   2018       (In thousands, except interest rates)   Weighted average interest rate during the year   3.31 % 3.39 % 2.48 % Interest rate at year end   2.86 % 3.60 % 2.84 % Maximum amount outstanding during the year $ 1,086,000 $ 959,400 $ 538,000   Average amount outstanding during the year $ 1,002,081 $ 699,415 $ 517,997   Facility fees $ 193 $ 374 $ 410

Derivatives (Table Text Block)

Derivatives (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Derivative Instrument Detail [Abstract]
Derivative Fair Values Located in Accounts Payable and Accrued Expenses in the Balance Sheet	March 31, 2020   March 31, 2019     (In thousands) Interest rate contracts designated as hedging instruments         Assets $ – $ 139 Liabilities   8,214   – Notional amount (debt)   235,000   22,792
Effect of Interest Rate Contracts on the Statement of Operations	The Effect of Interest Rate     Contracts on the Statements of Operations     Years Ended March 31,     2020   2019   2018     (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ 8,356 $ (633) $ (4,445) (Gain) loss reclassified from AOCI into income $ (401) $ 789 $ 3,893

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Table Text Block [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Market Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2019 $ (56,612) $ (7,259) $ 107 $ (2,934) $ (66,698) Foreign currency translation   9,377   –   –   –   9,377 Unrealized net gain on investments   –   97,943   –   –   97,943 Change in fair value of cash flow hedges   –   –   (6,301)   –   (6,301) Amounts reclassified into earnings on hedging activities   –   –   (2)   –   (2) Change in post retirement benefit obligaiton   –   –   –   333   333 Other comprehensive income (loss)   9,377   97,943   (6,303)   333   101,350 Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652

Stockholders' Equity (Table Tex

Stockholders' Equity (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Stockholders' Equity Note [Abstract]
Common Stock Dividends	Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               December 4, 2019 $ 0.50   December 19, 2019   January 6, 2020 August 22, 2019   0.50   September 9, 2019   September 23, 2019 March 6, 2019   0.50   March 21, 2019   April 4, 2019 December 5, 2018   0.50   December 20, 2018   January 7, 2019 August 23, 2018   0.50   September 10, 2018   September 24, 2018 June 6, 2018   0.50   June 21, 2018   July 5, 2018

Provision for Taxes (Table Text

Provision for Taxes (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Table Text Block [Abstract]
Provision For Taxes	Years Ended March 31,     2020   2019   2018     (In thousands) Pretax earnings:             U.S. $ 372,687 $ 466,175 $ 628,901 Non-U.S.   5,437   11,354   8,712 Total pretax earnings $ 378,124 $ 477,529 $ 637,613               Current provision (benefit)             Federal $ (373,817) $ (6,114) $ 21,780 State   (9,600)   3,420   6,471 Non-U.S.   949   1,375   1,412     (382,468)   (1,319)   29,663 Deferred provision (benefit)             Federal   307,846   94,961   (199,415) State   9,728   11,311   15,479 Non-U.S.   970   1,719   1,303     318,544   107,991   (182,633)               Provision for income tax expense (benefit) $ (63,924) $ 106,672 $ (152,970)               Income taxes paid (net of income tax refunds received) $ 6,859 $ 4,255 $ 68,671
Schedule of Effective Income Tax Rate Reconciliation	Years Ended March 31,       2020   2019   2018       (in percentages)   Statutory federal income tax rate   21.00 % 21.00 % 31.55 % Increase (reduction) in rate resulting from:               Deferred tax liability revaluation   – % – % (58.25) % NOL tax rate benefit   (38.62) % – % – % State taxes, net of federal benefit   0.02 % 2.41 % 2.33 % Foreign rate differential   0.21 % 0.15 % – % Federal tax credits   (0.53) % (0.15) % (0.32) % Transition tax   – % (0.20) % 1.83 % Tax-exempt income   (0.17) % – % – % Dividend received deduction   (0.01) % (0.01) % (0.03) % Phase III tax   – % – % 0.63 % Other   1.19 % (0.86) % (1.73) % Actual tax expense (benefit) of operations   (16.91) % 22.34 % (23.99) %
Components of Deferred Tax Assets and Liabilities	March 31,     2020   2019 Deferred tax assets:   (In thousands) Net operating loss and credit carry forwards $ 25,973 $ 90,061 Accrued expenses   105,171   105,727 Policy benefit and losses, claims and loss expenses payable, net   20,189   16,515 Operating leases   22,353   – Total deferred tax assets $ 173,686 $ 212,303           Deferred tax liabilities:         Property, plant and equipment $ 1,198,198 $ 940,433 Operating leases   22,353   – Deferred policy acquisition costs   12,795   14,191 Unrealized gains   29,873   4,223 Other   4,010   4,426 Total deferred tax liabilities   1,267,229   963,273 Net deferred tax liability $ 1,093,543 $ 750,970
Reconciliation of Total Amounts of Unrecognized Tax Benefits	Unrecognized Tax Benefits     March 31,     2020   2019     (In thousands)           Unrecognized tax benefits beginning balance $ 37,201 $ 35,739 Revaluation based on change in after tax benefit   –   – Additions based on tax positions related to the current year   42   1,887 Reductions for tax positions of prior years   (7,606)   (46) Settlements   (5)   (379) Unrecognized tax benefits ending balance $ 29,632 $ 37,201

Employee Benefit Plans (Table T

Employee Benefit Plans (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Table Text Block [Abstract]
Summary Of Financing Arrangements for Leveraged ESOP Debt	Outstanding as of   Interest Payments Financing Date   March 31, 2020   2020   2019   2018     (In thousands) June, 1991 $ – $ – $ 1 $ 1 July, 2009   –   9   17   26 February, 2016   –   229   190   242
Shares Held by the ESOP Plan	Years Ended March 31,     2020   2019     (In thousands) Allocated shares   1,003   1,069 Unreleased shares - leveraged   –   16 Fair value of unreleased shares - leveraged $ – $ 6,019 Unreleased shares - non-leveraged   –   – Fair value of unreleased shares - non-leveraged $ – $ –
Components of Net Periodic Post Retirement Benefit Cost	Years Ended March 31,     2020   2019   2018     (In thousands) Service cost for benefits earned during the period $ 1,055 $ 1,108 $ 1,073 Other components of net periodic benefit costs:             Interest cost on accumulated postretirement benefit   964   943   869 Other components   90   70   58 Total other components of net periodic benefit costs   1,054   1,013   927 Net periodic postretirement benefit cost $ 2,109 $ 2,121 $ 2,000
Components of Post Retirement Benefit Liabilities	Years Ended March 31,     2020   2019     (In thousands) Beginning of year $ 25,817 $ 23,316 Service cost for benefits earned during the period   1,055   1,108 Interest cost on accumulated post retirement benefit   964   943 Net benefit payments and expense   (93)   (979) Actuarial (gain) loss   (240)   1,429 Accumulated postretirement benefit obligation   27,503   25,817           Current liabilities   1,151   1,037 Non-current liabilities   26,352   24,780           Total post retirement benefit liability recognized in statement of financial position   27,503   25,817 Components included in accumulated other comprehensive income (loss):         Unrecognized net loss   (3,447)   (3,890) Cumulative net periodic benefit cost (in excess of employer contribution) $ 24,056 $ 21,927
Discount Rate Assumptions for Accumulated Postretirement Benefit Obligations	Years Ended March 31,     2020 2019 2018     (In percentages)   Accumulated postretirement benefit obligation   3.37 % 3.83 % 3.98 %
Future Net Benefit Payments Expected for Post Employee Benefit Obligations	Future Net Benefit Payments     (In thousands) Year-ended:     2021 $ 1,151 2022   1,350 2023   1,547 2024   1,753 2025   1,965 2026 through 2029   11,581 Total $ 19,347

Fair Value Measurements (Table

Fair Value Measurements (Table Text Block)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Financial Instruments, Carrying and Estimated fair values	Fair Value Hierarchy Year Ended 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/capital leases payable $ 4,651,068 $ – $ 4,651,068 $ – $ 4,342,308 Total $ 4,651,068 $ – $ 4,651,068 $ – $ 4,342,308	Fair Value Hierarchy Year Ended March 31, 2019   Carrying Value   Level 1   Level 2   Level 3   Total Estimated Fair Value     (In thousands) Assets                     Reinsurance recoverables and trade receivables, net $ 224,785 $ – $ – $ 224,785 $ 224,785 Mortgage loans, net   225,829   –   –   225,829   225,829 Other investments   74,907   –   –   74,907   74,907 Total $ 525,521 $ – $ – $ 525,521 $ 525,521                                             Liabilities                     Notes, loans and finance/capital leases payable $ 4,192,243   – $ 4,192,243 $ – $ 4,192,243 Total $ 4,192,243 $ – $ 4,192,243 $ – $ 4,192,243
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	Year Ended 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 $ –	Year Ended March 31, 2019   Total   Level 1   Level 2   Level 3     (In thousands) Assets                 Short-term investments $ 463,847 $ 463,599 $ 248 $ – Fixed maturities - available for sale   2,209,761   7,327   2,202,213   221 Preferred stock   8,257   8,257   –   – Common stock   17,379   17,379   –   – Derivatives   1,607   1,468   139   – Total $ 2,700,851 $ 498,030 $ 2,202,600 $ 221                                     Liabilities                 Derivatives $ – $ – $ – $ – Total $ – $ – $ – $ –

Reinsurance and Policy Benefi_2

Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Table Text Block)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
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, 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   –   –   60,848   – % Total $ 191,573 $ 266 $ (66,971) $ 124,336                               Year ended December 31, 2017                       Life insurance in force $ 947,720 $ 248 $ 876,865 $ 1,824,337   48 % Premiums earned:                       Life $ 51,227 $ 4 $ 9,880 $ 61,103   16 % Accident and health   90,396   295   1,977   92,078   2 % Annuity   728
Schedule of Effect of Reinsurance [Table Text Block]	December 31,     2019   2018     (In thousands) Unpaid losses and loss adjustment expense $ 209,127 $ 228,970 Reinsurance losses payable   1,214   988 Total $ 210,341 $ 229,958
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]	December 31,     2019   2018   2017     (In thousands) Balance at January 1 $ 228,970 $ 233,554 $ 244,400 Less: reinsurance recoverable   94,920   94,490   103,952 Net balance at January 1   134,050   139,064   140,448 Incurred related to:             Current year   22,137   19,579   15,749 Prior years   (9,535)   (5,365)   233 Total incurred   12,602   14,214   15,982 Paid related to:             Current year   7,366   8,838   8,969 Prior years   17,242   10,390   8,397 Total paid   24,608   19,228   17,366 Net balance at December 31   122,044   134,050   139,064 Plus: reinsurance recoverable   87,083   94,920   94,490 Balance at December 31 $ 209,127 $ 228,970 $ 233,554
Shortduration Insurance Contracts Claims Development [Table Text Block]	Cumulative Incurred Claims and Allocted Claims Adjustment Expenses, Net of Reinsurance                                 As of                                 December 31, 2019                                 Total of                                     Incurred-but-                                     Not-Reported                                     Liabilities Plus                                     Expected   Cumulative                                 Development   Number of Accident                               on Reported   Reported Year   2013   2014   2015   2016   2017   2018   2019   Claims   Claims         (In thousands, except claim counts)     2013 $ 9,861 $ 9,853 $ 9,914 $ 9,741 $ 9,576 $ 9,595 $ 9,594 $ –   7,652 2014       11,691   10,907   10,720   10,759   10,748   10,493   78   9,627 2015           12,214   12,459   12,460   12,464   11,087   –   10,652 2016               13,297   13,011   13,056   11,790   –   10,954 2017                   15,749   16,109   17,078   1,411   11,291 2018                       19,580   18,386   4,692   11,083 2019	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance         (In thousands) Accident                             Year   2013   2014   2015   2016   2017   2018   2019 2013 $ 5,227 $ 7,608 $ 8,718 $ 9,462 $ 9,576 $ 9,595 $ 9,594 2014       6,154   8,087   9,270   9,293   10,325   10,327 2015           7,509   9,601   9,730   10,343   11,087 2016               7,777   10,665   11,643   11,746 2017                   8,969   11,638   14,825 2018                       8,838   12,689 2019                           7,366                     Total   Total   77,634 All outstanding liabilities before 2013, net of reinsurance       99,113 Liabilities for claims and claim adjustment expenses, net of reinsurance       122,044
Shortduration Insurance Contracts Reconciliation Of Claims Development To Liability [Table Text Block]	December 31, 2019     (In thousands) Liabilities for unpaid Property and Casualty claims     and claim adjustment expenses, net of reinsurance $ 122,044       Total reinsurance recoverable on unpaid     Property and Casualty claims $ 87,083       Total gross liability for unpaid Property and Casualty     claims and claim adjustment expense $ 209,127
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   54.4 % 20.5 % 10.2 % 3.6 % 5.9 % 0.1 % – %

Leases (Table Text Block)

Leases (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Supplemental Balance Sheet Information Related to Leases	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   116,072   –   116,072 Rental trucks   1,738,081   –   1,738,081 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	Finance   Operating   Weighted average remaining lease term (years)   4 Years   14 Years   Weighted average discount rate   3.5 % 4.6 %
Lease costs	Twelve Months Ended     March 31, 2020     (In thousands)       Operating lease costs $ 27,494       Finance lease cost:     Amortization of right-of-use assets $ 186,860 Interest on lease liabilities   30,901 Total finance lease cost $ 217,761
Maturities of Lease Liabilities	Finance leases   Operating leases Year ending March 31,   (In thousands)           2021 $ 218,424 $ 23,782 2022   164,190   22,001 2023   124,160   21,238 2024   106,156   20,616 2025   75,502   9,701 Thereafter   46,438   64,806 Total lease payments   734,870   162,144 Less: imputed interest   –   (55,701) Present value of lease liabilities $ 734,870 $ 106,443
Schedule of future minimum lease payments	Total     (In thousands) Year-ended March 31:     2020 $ 20,852 2021   18,495 2022   16,750 2023   16,317 2024   15,736 Thereafter   54,683 Total $ 142,833

Related Party Transactions (Tab

Related Party Transactions (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Related Party Revenue [Abstract]
Related Party Revenue	Years Ended March 31,     2020   2019   2018     (In thousands) U-Haul interest income revenue from Blackwater $ – $ – $ 3,326 U-Haul management fee revenue from Blackwater   24,014   23,986   23,577 U-Haul management fee revenue from Mercury   6,392   5,162   6,025   $ 30,406 $ 29,148 $ 32,928
Related Party Cost and Expense	Years Ended March 31,     2020   2019   2018     (In thousands) U-Haul lease expenses to Blackwater $ 2,631 $ 2,678 $ 2,684 U-Haul commission expenses to Blackwater   62,066   61,434   58,595   $ 64,697 $ 64,112 $ 61,279
Due from Related Party, Recap of Assets	March 31,     2020   2019     (In thousands) U-Haul receivable from Blackwater $ 25,293 $ 25,158 U-Haul receivable from Mercury   9,893   7,234 Other (a)   (402)   (1,503)   $ 34,784 $ 30,889

Statutory Financial Informati_2

Statutory Financial Information of Insurance Subsidiaries (Table Text Block)	12 Months Ended
	Dec. 31, 2019
Insurance [Abstract]
Statutory Financial Information of Insurance Subsidiaries	Years Ended December 31,     2019   2018   2017     (In thousands) Repwest:             Audited statutory net income $ 28,614 $ 23,960 $ 16,328 Audited statutory capital and surplus   226,999   216,763   197,375 ARCOA:             Audited statutory net income   2,906   1,612   1,190 Audited statutory capital and surplus   12,851   9,390   7,991 Oxford:             Audited statutory net income   18,599   11,367   10,350 Audited statutory capital and surplus   223,264   203,723   195,931 CFLIC:             Audited statutory net income   8,043   8,735   8,062 Audited statutory capital and surplus   26,305   27,232   26,653 NAI:             Audited statutory net income   1,942   1,436   1,594 Audited statutory capital and surplus   13,371   12,817   12,674

Financial Information by Geog_2

Financial Information by Geographic Area (Table Text Block)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
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, 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	United States   Canada   Consolidated     (All amounts are in thousands U.S. $'s) Fiscal Year Ended March 31, 2018             Total revenues $ 3,435,821 $ 165,293 $ 3,601,114 Depreciation and amortization, net of gains on disposal   363,826   8,521   372,347 Interest expense   123,777   2,929   126,706 Pretax earnings   628,901   8,712   637,613 Income tax expense (benefit)   (155,685)   2,715   (152,970) Identifiable assets   10,425,299   322,123   10,747,422

Consolidating Financial Infor_2

Consolidating Financial Information by Industry Segment (Table Text Block)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Table Text Block Supplement [Abstract]
Consolidated Balance Sheet by Industry Segment	Consolidating balance sheets by industry segment as of March   31, 2020 are as follows:     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   –	Consolidating balance sheets by industry segment as of March 31, 2019 are as follows:     Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Assets:                       Cash and cash equivalents $ 643,918 $ 5,757 $ 24,026 $ –   $ 673,701 Reinsurance recoverables and trade receivables, net   90,832   102,120   31,833   –     224,785 Inventories and parts, net   103,504   –   –   –     103,504 Prepaid expenses   174,100   –   –   –     174,100 Investments, fixed maturities and marketable equities   –   279,641   1,955,756   –     2,235,397 Investments, other   23,013   74,679   203,044   –     300,736 Deferred policy acquisition costs, net   –   –   136,276   –     136,276 Other assets   72,768   2,456   3,130   –     78,354 Related party assets   35,997   6,639   16,466   (28,213) (c)   30,889     1,144,132   471,292   2,370,531   (28,213)     3,957,742                         Investment in subsidiaries   534,157   –   –   (534,157) (b)   –                         Property, plant and equipment, at cost:                       Land   976,454   –   –   –     976,454 Buildings and improvements   4,003,726   –   –   –     4,003,726 Furniture and equipment   689,780   –   –   –     689,780 Rental trailers and other rental equipment   590,039   –   –   –     590,039 Rental trucks   4,762,028   –   –   –     4,762,028     11,022,027   –   –   –     11,022,027 Less:   Accumulated depreciation   (3,088,056)   –   –   –     (3,088,056) Total property, plant and equipment   7,933,971   –   –
Consolidated Statement of Operations by Industry Segment	Consolidating statements of operations by industry segment for period ending March 31, 2020 are as follows:     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	Consolidating statements of operations by industry segment for period ending March 31, 2019 are as follows:     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	Consolidating statements of operations by industry segment for period ending March 31, 2018 are as follows:     Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Eliminations     AMERCO Consolidated     (In thousands) Revenues:                       Self-moving equipment rentals $ 2,483,956 $ – $ – $ (4,214) (c) $ 2,479,742 Self-storage revenues   323,903   –   –   –     323,903 Self-moving & self-storage products & service sales   261,557   –   –   –     261,557 Property management fees   29,602   –   –   –     29,602 Life insurance premiums   –   –   154,703   –     154,703 Property and casualty insurance premiums   –   58,800   –   (1,700) (c)   57,100 Net investment and interest income   12,232   15,771   84,158   (1,688) (b)   110,473 Other revenue   179,417   –   5,001   (384) (b)   184,034 Total revenues   3,290,667   74,571   243,862   (7,986)     3,601,114                         Costs and expenses:                       Operating expenses   1,758,697   32,710   22,061   (6,412) (b,c)   1,807,056 Commission expenses   276,705   –   –   –     276,705 Cost of sales   160,489   –   –   –     160,489 Benefits and losses   –   15,983   169,328   –     185,311 Amortization of deferred policy acquisition costs   –   –   24,514   –     24,514 Lease expense   34,243   –   –   (283) (b)   33,960 Depreciation, net gains on disposals   543,247   –   –   –     543,247 Net (gains) losses on disposal of real estate   (195,414)   –   –   –     (195,414) Total costs and expenses   2,577,967   48,693   215,903   (6,695)     2,835,868                         Earnings from operations before equity in earnings of subsidiaries   712,700   25,878   27,959
Consolidated Cash Flow Statement by Industry Segment	Consolidating cash flow statements by industry segment for the year ended March 31, 2020, are as follows:     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)   –   –	Consolidating cash flow statements by industry segment for the year ended March 31, 2019, are as follows:     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)   –	Consolidating cash flow statements by industry segment for the year ended March 31, 2018 are as follows:       Moving & Storage Consolidated   Property & Casualty Insurance (a)   Life Insurance (a)   Elimination     AMERCO Consolidated     (In thousands) Cash flows from operating activities:                       Net earnings $ 790,583 $ 22,889 $ 24,101 $ (46,990)   $ 790,583 Earnings from consolidated subsidiaries   (46,990)   –   –   46,990     – Adjustments to reconcile net earnings to cash provided by operations:                       Depreciation   555,069   –   –   –     555,069 Amortization of deferred policy acquisition costs   –   –   24,514   –     24,514 Amortization of premiums and accretion of discounts related to investments, net   –   1,356   11,434   –     12,790 Amortization of debt issuance costs   3,868   –   –   –     3,868 Interest credited to policyholders   –   –   32,302   –     32,302 Change in allowance for losses on trade receivables   (31)   –   (89)   –     (120) Change in allowance for inventories and parts reserve   5,065   –   –   –     5,065 Net gains on disposal of personal property   (11,822)   –   –   –     (11,822) Net gains on disposal of real estate   (195,414)   –   –   –     (195,414) Net gains on sales of investments   –   (1,703)   (4,566)   –     (6,269) Deferred income taxes   (182,358)   (6,596)   (4,480)   –     (193,434) Net change in other operating assets and liabilities:                       Reinsurance recoverables and trade receivables   (23,444)   8,075   40   –     (15,329) Inventories and parts   (12,384)   –   –   –     (12,384) Prepaid expenses   (40,765)   –   –   –     (40,765) Capitalization of deferred policy acquisition costs   –   –   (27,350)   –     (27,350) Other assets   (167,579)   1,810   (199)   –     (165,968) Related party assets   48,855   4,553   –   –     53,408 Accounts payable and accrued expenses   (36,384)   648   (1,244)   –

Disaggregation of revenue (Tabl

Disaggregation of revenue (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Lease schedule over next five years and thereafter	Year Ended March 31,     2021   2022   2023   2024   2025   Thereafter           (In thousands)                           Self-moving equipment rentals $ 2,139 $ – $ – $ – $ – $ – Property lease revenues   20,715   16,927   13,250   9,834   7,102   58,379 Total $ 22,854 $ 16,927 $ 13,250 $ 9,834 $ 7,102 $ 58,379
Disaggregation of revenue	Years Ended March 31,     2020   2019   2018           (In thousands)               Revenues recognized over time $ 147,565 $ 2,814,732 $ 2,617,990 Revenues recognized at a point in time   309,804   305,408   301,152 Total revenues recognized under ASC 606   457,369   3,120,140   2,919,142               Revenues recognized under ASC 842 or 840   3,182,902   406,070   353,924 Revenues recognized under ASC 944   200,768   131,563   217,575 Revenues recognized under ASC 320   137,829   110,934   110,473 Total revenues $ 3,978,868 $ 3,768,707 $ 3,601,114

Principles of Consolidation (Na

Principles of Consolidation (Narratives) (Details)	12 Months Ended
	Mar. 31, 2020
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, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
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	$ 18,886,000		$ 18,987,000
Effect of LIFO inventory liquidation on income	100,000
Disposition of Property, Plant and Equipment
Net amount of (gains) losses netted against depreciation expense	27,100,000		27,000,000		$ 11,800,000
Additional operating expenses	$ 27,700,000		21,000,000
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	$ 69,600,000		53,500,000
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]
Self insurance reserve	410,100,000		407,900,000
Accrued insurance, noncurrent	15,700,000		15,600,000
Marketing and Advertising Expense [Abstract]
Advertising expense	13,700,000		10,600,000		$ 8,100,000
Policyholder Benefits and Claims Incurred [Abstract]
Deferred sales inducements, net		$ 16,800,000		$ 19,100,000
Deferred sales inducements, amortization expense		$ 5,500,000		$ 3,700,000		$ 3,700,000
Adoption of New Accounting Pronounements
Operating lease commitment, asset	1,080,353,000		$ 0
Operating lease commitment, liability	$ 106,443,000

Accounting Policies (Inventorie

Accounting Policies (Inventories, net) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Inventory, Net [Abstract]
Truck and trailer parts and accessories (a)	$ 88,138	$ 94,344
Hitches and towing components (b)	23,070	20,113
Moving supplies and propane (b)	11,824	10,356
Subtotal	123,032	124,813
Less: LIFO reserves	(18,886)	(18,987)
Less: excess and obsolete reserves	(3,063)	(2,322)
Total	$ 101,083	$ 103,504

Earnings Per Share (Narratives)

Earnings Per Share (Narratives) (Details) - shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Employee stock ownership plan, unreleased shares	11,949	17,581

Reinsurance Recoverables and _3

Reinsurance Recoverables and Trade Receivables, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Reinsurance Recoverables and Trade Receivables, Net [Abstract]
Reinsurance recoverable	$ 89,020	$ 87,083	$ 99,615
Trade accounts receivable	59,394		90,786
Paid losses recoverable	624		2,333
Accrued investment income	25,744		25,142
Premiums and agents' balances	1,582		1,545
Independent dealer receivables	1,015		390
Other receivables	9,828		5,523
Reinsurance recoverables and trade receivables, gross	187,207		225,334
Less: Allowance for doubtful accounts	(535)		(549)
Reinsurance recoverables and trade receivables, net	$ 186,672		$ 224,785

Investments (Narratives) (Detai

Investments (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Assets held by insurance regulators	$ 30.8
Fair value of sold available-for-sale securities	264.5	$ 114.8	$ 163.7
Available-for-sale securities, gross realized gains	6.4	2	5.4
Available-for-sale securities, gross realized losses	0.2	$ 0.2	$ 0.3
Mortgages [Member]
Investments, Debt and Equity Securities [Abstract]
Other-than-temporary impairments	$ 0.5
Mortgages [Member] | Minimum [Member]
Real Estate [Abstract]
Mortgage loan interest rate	4.10%
Debt instrument, maturity year	2020
Mortgages [Member] | Maximum [Member]
Real Estate [Abstract]
Mortgage loan interest rate	8.20%
Debt instrument, maturity year	2036

Investments (Available-for-sale

Investments (Available-for-sale investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Available-for-sale securities, investments:
Amortized cost	$ 2,334,215	$ 2,228,961
Gross unrealized gains	135,767	26,598
Gross unrealized losses more than 12 months	(1,077)	(17,025)
Gross unrealized losses less than 12 months	(1,292)	(27,305)
Estimated market value	2,467,613	2,211,229
U.S. treasury securities and government obligations [Member]
Available-for-sale securities, investments:
Amortized cost	112,421	136,010
Gross unrealized gains	7,959	2,409
Gross unrealized losses more than 12 months	(1)	(2,104)
Gross unrealized losses less than 12 months	0	(447)
Estimated market value	120,379	135,868
U.S. government agency mortgage-backed securities [Member]
Available-for-sale securities, investments:
Amortized cost	88,449	31,101
Gross unrealized gains	759	433
Gross unrealized losses more than 12 months	(1)	(146)
Gross unrealized losses less than 12 months	(373)	(19)
Estimated market value	88,834	31,369
Obligations of states and political subdivisions [Member]
Available-for-sale securities, investments:
Amortized cost	287,643	298,955
Gross unrealized gains	20,664	8,079
Gross unrealized losses more than 12 months	(155)	(233)
Gross unrealized losses less than 12 months	0	(905)
Estimated market value	308,152	305,896
Corporate securities [Member]
Available-for-sale securities, investments:
Amortized cost	1,656,425	1,613,199
Gross unrealized gains	100,302	14,777
Gross unrealized losses more than 12 months	(919)	(14,257)
Gross unrealized losses less than 12 months	(812)	(24,986)
Estimated market value	1,754,996	1,588,733
Mortgage-backed securities [Member]
Available-for-sale securities, investments:
Amortized cost	187,784	148,203
Gross unrealized gains	6,011	880
Gross unrealized losses more than 12 months	(1)	(285)
Gross unrealized losses less than 12 months	(107)	(903)
Estimated market value	193,687	147,895
Redeemable Preferred Stocks [Member]
Available-for-sale securities, investments:
Amortized cost	1,493	1,493
Gross unrealized gains	72	20
Gross unrealized losses more than 12 months	0	0
Gross unrealized losses less than 12 months	0	(45)
Estimated market value	$ 1,565	$ 1,468

Investments (Adjusted cost and

Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Available-for-sale securities, amortized cost:
Amortized cost	$ 2,334,215	$ 2,228,961
Available-for-sale securities, fair value:
Estimated market value	2,467,613	2,211,229
Us Government Corporate Securities [Member]
Available-for-sale securities, amortized cost:
Due in one year or less	128,747	71,987
Due after one year through five years	547,821	541,195
Due after five years through ten years	636,036	621,031
Due after ten years	832,334	845,052
Amortized cost	2,144,938	2,079,265
Available-for-sale securities, fair value:
Due in one year or less	129,420	71,954
Due after one year through five years	566,934	540,658
Due after five years through ten years	678,636	614,485
Due after ten years	897,371	834,769
Estimated market value	2,272,361	2,061,866
Mortgage backed securities [Member]
Available-for-sale securities, amortized cost:
Amortized cost	187,784	148,203
Available-for-sale securities, fair value:
Estimated market value	193,687	147,895
Redeemable Preferred Stocks [Member]
Available-for-sale securities, amortized cost:
Amortized cost	1,493	1,493
Available-for-sale securities, fair value:
Estimated market value	$ 1,565	$ 1,468

Investments (Available for sale

Investments (Available for sale equity investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Marketable Securities [Abstract]
Amortized cost, equity investments	$ 14,851	$ 17,574
Estimated market value, equity investments	25,125	24,168
Common stocks [Member]
Marketable Securities [Abstract]
Amortized cost, equity investments	9,775	10,123
Estimated market value, equity investments	20,015	17,379
Non-redeemable preferred stocks [Member]
Marketable Securities [Abstract]
Amortized cost, equity investments	5,076	7,451
Estimated market value, equity investments	$ 5,110	$ 6,789

Investments (Carrying value of

Investments (Carrying value of other investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Investments [Abstract]
Mortgage loans, net	$ 262,688	$ 225,829
Short-term investments	6,995	5,546
Real estate	69,569	53,519
Policy loans	11,212	10,491
Other equity investments	9,909	5,351
Total investments	$ 360,373	$ 300,736

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Other Assets [Abstract]
Deposits (debt-related)	$ 33,020	$ 30,408
Cash surrender value of life insurance policies	31,371	30,985
Deposits (real estate related)	7,565	16,961
Other assets, total	$ 71,956	$ 78,354

Net Investment and Interest I_3

Net Investment and Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Net Investment Income [Line Items]
Investment income	$ 142,683	$ 115,436	$ 111,913
Less: investment expenses	(4,854)	(4,502)	(4,766)
Investment income, related party	0	0	3,326
Net investment and interest income	137,829	110,934	110,473
Fixed Maturities [Member]
Net Investment Income [Line Items]
Investment income	107,434	99,348	84,476
Real Estate [Member]
Net Investment Income [Line Items]
Investment income	7,304	5,538	5,344
Insurance policy loans [Member]
Net Investment Income [Line Items]
Investment income	974	1,305	1,212
Mortgage loans [Member]
Net Investment Income [Line Items]
Investment income	17,164	16,674	17,783
Short-term, amounts held by ceding reinsurers, net and other investments [Member]
Net Investment Income [Line Items]
Investment income	$ 9,807	$ (7,429)	$ 3,098

Borrowings (Narratives) (Detail

Borrowings (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Debt instruments, face, payment, and remaining balance amount:
Notes, loans and leases payable	$ 4,621,291		$ 4,163,323
Debt instruments, issuance and maturity dates:
Remaining Lease Term Fianance Lease Weighted Average	4 Years
Real estate loan (amortizing term) [Member] | Minimum [Member]
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2020
Real estate loan (amortizing term) [Member] | Maximum [Member]
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2036
Real estate loans (revolving credit) [Member] | Amerco [Member]
Debt instruments, face, payment, and remaining balance amount:
Line of credit facility, maximum borrowing capacity	$ 385,000
Real estate loans (revolving credit) [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	1.58%
Applicable margin interest rate	1.25%
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2022
Real estate loans (revolving credit) [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	1.60%
Applicable margin interest rate	1.40%
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2025
Real estate loans two (revolving credit) [Member] | Amerco [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	1.60%
Applicable margin interest rate	1.38%
Sum of LIBOR and margin, maximum rate	2.98%
Applicable margin, per loan agreement, maximum rate	2.25%
Unused capacity fee	0.30%
Debt instruments, face, payment, and remaining balance amount:
Line of credit facility, maximum borrowing capacity	$ 300,000
Line of credit facility, remaining borrowing capacity	150,000
Notes, loans and leases payable	150,000
Amount held at fixed interest rate	$ 200,000
Rental Truck (securitizations) [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.92%
Rental Truck (securitizations) [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.04%
Capital Lease Obligations [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.63%
Capital Lease Obligations [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.22%
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	0.86%
Applicable margin interest rate	1.50%
Sum of LIBOR and margin, maximum rate	2.36%
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	3.11%
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%
Uhaul Intl and Subsidiaries [Member] | Rental Truck (amortizing loans) First Loan [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.95%
Uhaul Intl and Subsidiaries [Member] | Rental Truck (amortizing loans) First Loan [Member] | Amerco [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.66%
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member]
Debt instruments, interest rate, effective percentage:
Applicable margin interest rate	1.15%
Debt instruments, face, payment, and remaining balance amount:
Line of credit facility, maximum borrowing capacity	$ 590,000
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Minimum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	1.58%
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Maximum [Member]
Debt instruments, interest rate, effective percentage:
LIBOR	1.60%
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Amerco [Member]
Debt instruments, face, payment, and remaining balance amount:
Notes, loans and leases payable	$ 87,300
Subsidiary holdings of parent company debt	$ 2,800
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Amerco [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.50%
Debt instruments, issuance and maturity dates:
Debt instrument, maturity year	2020
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [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		$ 60,000
Available for sale equity securities, noncurrent		117,900
Available for sale equity securities pledged as collateral		$ 67,600
Life Insurance [Member] | FHLB [Member] | Minimum [Member]
Federal Home Loan Bank, Advances, Activity for the year [Abstract]
Deposit interest rate		1.72%
Life Insurance [Member] | FHLB [Member] | Maximum [Member]
Federal Home Loan Bank, Advances, Activity for the year [Abstract]
Deposit interest rate		2.95%

Borrowings (Long-term debt borr

Borrowings (Long-term debt borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt instrument, maturities:
Notes, loans and leases payable, gross		$ 4,192,243
Less: Debt issuance costs	$ (29,777)	(28,920)
Notes, loans and leases payable, net	$ 4,621,291	4,163,323
Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.36%
Debt instrument, maturities:
Debt instrument, maturity year range, end	2023
Notes, loans and leases payable, gross	$ 92,913	102,913
Real estate loan (amortizing term) [Member] | Minimum [Member]
Debt instrument, maturities:
Debt instrument, maturity year	2020
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 leases payable, gross	$ 2,029,878	1,741,652
Senior mortgages [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	3.11%
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	2022
Debt instrument, maturity year range, end	2025
Notes, loans and leases payable, gross	$ 519,000	429,400
Real estate loans (revolving credit) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.98%
Real estate loans (revolving credit) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	3.14%
Fleet loans (amortizing) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2020
Debt instrument, maturity year range, end	2027
Notes, loans and leases payable, gross	$ 224,089	263,209
Fleet loans (amortizing) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.95%
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	2022
Debt instrument, maturity year range, end	2024
Notes, loans and leases payable, gross	$ 567,000	530,000
Fleet loans (securitization) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.73%
Fleet loans (securitization) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.75%
Fleet Loans (revolving credit) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, start	2020
Debt instrument, maturity year range, end	2026
Notes, loans and leases payable, gross	$ 734,870	1,042,652
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	2027
Notes, loans and leases payable, gross	$ 398,834	0
Capital leases (rental equipment) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.63%
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	2020
Debt instrument, maturity year range, end	2049
Notes, loans and leases payable, gross	$ 84,484	$ 82,417
Other Obligations [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.50%
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, 2020USD ($)
Long-term debt, by Maturity:
2020	$ 459,184
2021	510,933
2022	1,011,688
2023	755,025
2024	393,498
Thereafter	1,520,740
Total	$ 4,651,068

Interest on Borrowings (Narrati

Interest on Borrowings (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Interest paid in cash including payments related to derivative contracts	$ 168.1	$ 149.8	$ 129.3

Interest on Borrowings (Compone

Interest on Borrowings (Components of interest expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Interest expense, borrowings:
Interest expense	$ 180,444	$ 150,609	$ 125,412
Capitalized interest	(23,517)	(12,733)	(6,466)
Amortization of transaction costs	4,427	3,745	3,867
Interest expense resulting from derivatives	$ (404)	$ 824	$ 3,893

Interest on Borrowings (Interes

Interest on Borrowings (Interest Rates and Company Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Interest and debt expense:
Weighted average interest rate during the year	3.31%	3.39%	2.48%
Interest rate at year end	2.86%	3.60%	2.84%
Maximum amount outstanding during the year	$ 1,086,000	$ 959,400	$ 538,000
Average amount outstanding during the year	1,002,081	699,415	517,997
Facility fees	$ 193	$ 374	$ 410

Derivatives (Narratives) (Detai

Derivatives (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in fair value of cash flow hedges, net of tax			$ 3,082
Notional amount of operating lease	$ 400
Loss reclassified from AOCI into income (effective portion)	(401)	$ 789	$ 3,893
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months	400
Derivative hedge market value	5,900	1,500
Derivative Notional Amount	$ 246,800	$ 284,000

Derivatives (Interest rate cont

Derivatives (Interest rate contracts designated as hedging instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Interest Rate Fair Value Hedges [Abstract]
Assets	$ 0	$ 139
Liabilities	(8,214)	0
Notional amount (debt)	$ 235,000	$ 22,792

Derivatives (Effect of interest

Derivatives (Effect of interest rate contracts on statement of operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Effect of Interest rate Contracts [Abstract]
Loss recognized in income on interest rate contracts	$ (404)	$ 824	$ 3,893
(Gain) recognized in AOCI on interest rate contracts (effective portion)	(8,356)	633	4,445
Loss reclassified from AOCI into income (effective portion)	$ (401)	$ 789	$ 3,893

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	$ (66,698)
Foreign currency translation	9,377	$ (1,759)	$ 14,652
Unrealized net loss on investments	97,943		20,104
Change in fair value of cash flow hedges			3,082
Amounts reclassified into earnings on hedging activities	(401)	789	3,893
Change in postretirement benfit obligations	333	(1,025)	35
Other comprehensive income (loss)	101,350	(62,075)	37,873
Balance as of March 31, 2020	34,652	(66,698)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	(56,612)
Foreign currency translation	9,377
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)	9,377
Balance as of March 31, 2020	(47,235)	(56,612)
Unrealized Gain (Loss) on Investments
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	(7,259)
Foreign currency translation	0
Unrealized net loss on investments	97,943
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)	97,943
Balance as of March 31, 2020	90,684	(7,259)
Fair Market Value of Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	107
Foreign currency translation	0
Unrealized net loss on investments	0
Change in fair value of cash flow hedges	(6,301)
Amounts reclassified into earnings on hedging activities	(2)
Change in postretirement benfit obligations	0
Other comprehensive income (loss)	(6,303)
Balance as of March 31, 2020	(6,196)	107
Postretirement Benefit Obligation Gain (Loss)
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	(2,934)
Foreign currency translation	0	0	0
Unrealized net loss on investments	0	0	0
Change in fair value of cash flow hedges	0	0	0
Amounts reclassified into earnings on hedging activities	0
Change in postretirement benfit obligations		0	0
Other comprehensive income (loss)	333
Balance as of March 31, 2020	(2,601)	(2,934)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward]
Balance as of March 31, 2019	(66,698)
Foreign currency translation	9,377	(1,759)	14,652
Unrealized net loss on investments	97,943	(50,044)	20,104
Change in fair value of cash flow hedges		477	3,082
Amounts reclassified into earnings on hedging activities	(2)
Change in postretirement benfit obligations	333	(1,025)	$ 35
Other comprehensive income (loss)	101,350
Balance as of March 31, 2020	$ 34,652	$ (66,698)

Stockholders' Equity (Narrative

Stockholders' Equity (Narratives) (Details) - $ / shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Dividends declared one [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 two [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
Dividends declared three [Member]
Dividends Declared
Dividends payable, date declared	Mar. 6, 2019
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Mar. 21, 2019
Dividends payable, date to be paid	Apr. 4, 2019
Dividends declared four [Member]
Dividends Declared
Dividends payable, date declared		Dec. 5, 2018
Dividend paid, amount per share		$ 0.50
Dividends payable, date of record		Dec. 20, 2018
Dividends payable, date to be paid		Jan. 7, 2019
Dividends declared five [Member]
Dividends Declared
Dividends payable, date declared		Aug. 23, 2018
Dividend paid, amount per share		$ 0.50
Dividends payable, date of record		Sep. 10, 2018
Dividends payable, date to be paid		Sep. 24, 2018
Dividends declared six [Member]
Dividends Declared
Dividends payable, date declared		Jun. 6, 2018
Dividend paid, amount per share		$ 0.50
Dividends payable, date of record		Jun. 21, 2018
Dividends payable, date to be paid		Jul. 5, 2018

Provision for Taxes (Narratives

Provision for Taxes (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2018	Mar. 31, 2019
Components of Deferred Tax Assets and Liabilities [Abstract]
NOL and credit carryforwards, federal amount	$ 146,000
Federal statutory rate, blended rate for fiscal year	31.55%
Provisional benefit amount	$ 356,600
Deferred tax assets, effect of Tax Cuts and Jobs Act, tax expense (benefit)	371,500
Reclassified amount from accumulated other comprehensive income to retained earnings	8,700	$ 0
Provisional tax expense for foreign tax credits	10,700
Phase three tax, increase in income tax expense	4,200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized tax benefits, income tax penalties and interest accrued	12,800		$ 9,500
Unrecognized tax benefits, income tax penalties and interest expense	3,300
Amerco [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
NOL and credit carryfowards, state amount	$ 337,300		$ 172,300

Provision for Taxes (Earnings b

Provision for Taxes (Earnings before taxes and provision for taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Pretax earnings:
U.S.	$ 372,687	$ 466,175	$ 628,901
Non-U.S.	5,437	11,354	8,712
Total pretax earnings	378,124	477,529	637,613
Current provision (benefit)
Federal	(373,817)	(6,114)	21,780
State	(9,600)	3,420	6,471
Non-U.S.	949	1,375	1,412
Current provision (benefit), total	(382,468)	(1,319)	29,663
Deferred provision (benefit)
Federal	307,846	94,961	(199,415)
State	9,728	11,311	15,479
Non-U.S.	970	1,719	1,303
Deferred provision (benefit), total	318,544	$ 107,991	$ (182,633)
Income taxes paid (net of income tax refunds)	$ 6,859

Provision for Taxes (Effective

Provision for Taxes (Effective income tax rate reconciliation) (Details)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax rate	21.00%	21.00%	31.55%
Increase (Reduction) in Rate Resulting from [Abstract]
Deferred tax liability revaluation	0.00%	0.00%	(58.25%)
NOL tax rate benefit	(38.62%)	0.00%	0.00%
State taxes, net of federal benefit	0.02%	2.41%	2.33%
Foreign rate differential	0.21%	0.15%	0.00%
Federal tax credits	0.53%	0.15%	0.32%
Transition tax	0.00%	(0.20%)	1.83%
Tax exempt income	(0.17%)	0.00%	0.00%
Dividends received deduction	0.01%	0.01%	0.03%
Phase III Tax	0.00%	0.00%	0.63%
Other	1.19%	(0.86%)	(1.73%)
Actual tax expense of operations	(16.91%)	22.34%	(23.99%)

Provision for Taxes (Significan

Provision for Taxes (Significant components of deferred tax assets and liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Net operating loss and credit carry forwards	$ 25,973	$ 90,061
Accrued expenses	105,171	105,727
Policy benefits and losses, claims and loss expenses payable, net	20,189	16,515
Operating leases, assets	22,353	0
Total deferred tax assets	173,686	212,303
Deferred tax liabilities:
Property, plant and equipment	1,198,198	940,433
Operating leases, liabilities	22,353	0
Deferred policy acquisition costs	12,795	14,191
Unrealized gains	29,873	4,223
Other	4,010	4,426
Total deferred tax liabilities	1,267,229	963,273
Net deferred tax liability	$ 1,093,543	$ 750,970

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, 2020	Mar. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits beginning balance	$ 37,201	$ 35,739
Revaluation based on change in after tax benefit	0	0
Additions based on tax positions related to the current year	42	1,887
Reductions for tax positions of prior years	7,606	46
Settlements	5	379
Unrecognized tax benefits ending balance	$ 29,632	$ 37,201

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narratives) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Compensation of related costs, Share-based Payments [Abstract]
Employee stock ownership plan (ESOP), compensation expense	$ 10,300,000	$ 11,300,000	$ 11,400,000
Employee stock ownership plan (ESOP), cash contributions to ESOP	5,600,000	1,000,000	1,000,000
Cash contributions to ESOP non leveraged	4,000,000	$ 5,200,000	$ 11,000,000
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	6.50%	6.90%
Defined benefit plan, ultimate health care cost trend rate	4.50%	4.50%
Defined benefit plan, effect of one percentage point increase on accumulated postretirement benefit obligation	$ 246
Defined benefit plan, effect of one percentage point increase on service and interest cost components	25
Defined benefit plan, effect of one percentage point decrease on accumulated postretirement benefit obligation	278
Defined benefit plan, effect of one percentage point decrease on service and interest cost components	29
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, 2020	Mar. 31, 2019	Mar. 31, 2018
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	$ 1	$ 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	9	17	26
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	$ 229	$ 190	$ 242

Employee Benefit Plans (Shares

Employee Benefit Plans (Shares Held by the ESOP Plan) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated shares	1,003	1,069
Unreleased shares	0	16
Fair value of unreleased shares	$ 0	$ 6,019
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, 2020	Mar. 31, 2019	Mar. 31, 2018
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 1,055	$ 1,108	$ 1,073
Interest cost on accumulated postretirement benefit	964	943	869
Other components	90	70	58
Net periodic postretirement benefit cost	$ 2,109	$ 2,121	$ 2,000

Employee Benefit Plans (Compo_2

Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning of year	$ 25,817	$ 23,316
Service cost for benefits earned during the period	1,055	1,108	$ 1,073
Interest cost on accumulated post retirement benefit	964	943	869
Net benefit payments and expense	93	979
Actuarial loss	(240)	1,429
Accumulated postretirement benefit obligation	27,503	25,817	$ 23,316
Liabilities:
Current liabilities	1,151	1,037
Non-currrent liabilities	26,352	24,780
Total post retirement benefit liability recognized in statement of financial position	27,503	25,817
Components included in accumulated other comprehensive income (loss):
Unrecognized net loss	(3,447)	(3,890)
Cumulative net periodic benefit cost (in excess of employer contribution)	$ 24,056	$ 21,927

Employee Benefit Plans (Discoun

Employee Benefit Plans (Discount Rate Assumptions in Computation of Accumulated Postretirement Benefit Obligation) (Details)	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Accumulated postretirement benefit obligation	3.37%	3.83%	3.98%

Employee Benefit Plans (Future

Employee Benefit Plans (Future Net Benefit Payments Expected for Post Employee Benefit Obligations) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2020	$ 1,151
2021	1,350
2022	1,547
2023	1,753
2024	1,965
2025 through 2028	11,581
Total	$ 19,347

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Assets
Reinsurance recoverables and trade receivables, net	$ 186,672	$ 224,785
Mortgage loans, net	262,688	225,829
Other investments	97,685	74,907
Total	547,045	525,521
Liabilities
Notes, loans and leases payable, gross		4,192,243
Total	4,342,308	4,192,243
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	4,651,068	4,192,243
Total	4,651,068	4,192,243
Level 3 [Member]
Assets
Reinsurance recoverables and trade receivables, net	186,672	224,785
Mortgage loans, net	262,688	225,829
Other investments	97,685	74,907
Total	547,045	525,521
Liabilities
Notes, loans and leases payable, gross	0	0
Total	0	0
Carrying Value [Member]
Assets
Reinsurance recoverables and trade receivables, net	186,672	224,785
Mortgage loans, net	262,688	225,829
Other investments	97,685	74,907
Total	547,045	525,521
Liabilities
Notes, loans and leases payable, gross	4,651,068	4,192,243
Total	$ 4,651,068	$ 4,192,243

Fair Value Measurements (Financ

Fair Value Measurements (Financial Instruments Level within the Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Assets:
Short-term investments	$ 369,279	$ 463,847
Fixed maturities - available for sale	2,466,048	2,209,761
Preferred stock	6,675	8,257
Common stock	20,015	17,379
Derivatives	5,944	1,607
Total	2,867,961	2,700,851
Liabilities:
Derivatives	8,214	0
Total	8,214	0
Level 1 [Member]
Assets:
Short-term investments	368,968	463,599
Fixed maturities - available for sale	7,156	7,327
Preferred stock	6,675	8,257
Common stock	20,015	17,379
Derivatives	5,944	1,468
Total	408,758	498,030
Liabilities:
Derivatives	0	0
Total	0	0
Level 2 [Member]
Assets:
Short-term investments	311	248
Fixed maturities - available for sale	2,458,731	2,202,213
Preferred stock	0	0
Common stock	0	0
Derivatives	0	139
Total	2,459,042	2,202,600
Liabilities:
Derivatives	8,214	0
Total	8,214	0
Level 3 [Member]
Assets:
Short-term investments	0	0
Fixed maturities - available for sale	161	221
Preferred stock	0	0
Common stock	0	0
Derivatives	0	0
Total	161	221
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, 2020	Dec. 31, 2019
Reinsurance Disclosures [Abstract]
Maximum amount of life insurance retained on any one life	$ 125,000
Letters of credit held at year end from re-insurers		$ 100,000
Letters of credit issued at year end		1,900,000
Reinsurance recoverable, gross		87,100,000
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease)		$ 19,800,000

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Year ended December 31,
Direct amount (a) - Life insurance in force	$ 957,280	$ 941,822	$ 947,720
Ceded to other companies - Life insurance in force	7	207	248
Assumed from other companies - Life insurance in force	441,563	548,152	876,865
Net amount (a) - Life insurance in force	$ 1,398,836	$ 1,489,767	$ 1,824,337
Percentage of amount assumed to net - Life insurance in force	32.00%	37.00%	48.00%
Direct amount (a)	$ 189,343	$ 191,573	$ 199,512
Ceded to other companies	227	266	368
Assumed from other companies	8,001	(66,971)	12,659
Net amount (a)	197,117	124,336	211,803
Premiums earned: Life [Member]
Year ended December 31,
Direct amount (a)	53,289	51,691	51,227
Ceded to other companies	1	(1)	4
Assumed from other companies	5,629	(69,616)	9,880
Net amount (a)	$ 58,917	$ (17,924)	$ 61,103
Percentage of amount assumed to net	10.00%	388.00%	16.00%
Premiums earned: Accident and health [Member]
Year ended December 31,
Direct amount (a)	$ 66,863	$ 77,813	$ 90,396
Ceded to other companies	226	267	295
Assumed from other companies	1,563	1,851	1,977
Net amount (a)	$ 68,200	$ 79,397	$ 92,078
Percentage of amount assumed to net	2.00%	2.00%	2.00%
Premiums earned: Annuity [Member]
Year ended December 31,
Direct amount (a)	$ 65	$ 1,221	$ 728
Ceded to other companies	0	0	0
Assumed from other companies	794	794	794
Net amount (a)	$ 859	$ 2,015	$ 1,522
Percentage of amount assumed to net	92.00%	39.00%	52.00%
Premiums earned: Property and casualty [Member]
Year ended December 31,
Direct amount (a)	$ 69,126	$ 60,848	$ 57,161
Ceded to other companies	0	0	69
Assumed from other companies	15	0	8
Net amount (a)	$ 69,141	$ 60,848	$ 57,100
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, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reinsurance:
Unpaid losses and loss adjustment expense		$ 209,127
Total	$ 997,647		$ 1,011,183
Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		209,127		$ 228,970	$ 233,554	$ 244,400
Operating Segments [Member] | Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		209,127		228,970
Reinsurance losses payable		1,214		988
Total	$ 210,341	$ 210,341	$ 229,958	$ 229,958

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Paid related to:
Net balance at December 31	$ 122,044
Plus: reinsurance recoverables	87,083
Balance at December 31	209,127
Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	228,970	$ 233,554	$ 244,400
Less: reinsurance recoverables	94,920	94,490	103,952
Net balance at January 1	134,050	139,064	140,448
Incurred related to:
Current year	22,137	19,579	15,749
Prior years	(9,535)	(5,365)	233
Total incurred	12,602	14,214	15,982
Paid related to:
Current year	7,366	8,838	8,969
Prior years	17,242	10,390	8,397
Total paid	24,608	19,228	17,366
Net balance at December 31	122,044	134,050	139,064
Plus: reinsurance recoverables	87,083	94,920	94,490
Balance at December 31	209,127	228,970	$ 233,554
Operating Segments [Member] | Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	228,970
Paid related to:
Balance at December 31	$ 209,127	$ 228,970

Reinsurance and Policy Benefi_7

Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details) $ in Thousands	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 16,924
Accident Year 2013 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	9,594	$ 9,595	$ 9,576	$ 9,741	$ 9,914	$ 9,853	$ 9,861
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	7,652
Accident Year 2014 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 10,493	10,748	10,759	10,720	10,907	$ 11,691
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 78
Shortduration Insurance Contracts Number Of Reported Claims	9,627
Accident Year 2015 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 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	10,652
Accident Year 2016 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 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	10,954
Accident Year 2017 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 17,078	16,109	$ 15,749
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 1,411
Shortduration Insurance Contracts Number Of Reported Claims	11,291
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 18,386	$ 19,580
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 4,692
Shortduration Insurance Contracts Number Of Reported Claims	11,083
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 22,138
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 10,743
Shortduration Insurance Contracts Number Of Reported Claims	10,745

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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	$ 77,634
All outstanding liabilities before 2012, net of reinsurance	99,113
Liabilities for claims and claim adjustment expenses, net of reinsurance	122,044
Accident Year 2013 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	9,594	$ 9,595	$ 9,576	$ 9,462	$ 8,718	$ 7,608	$ 5,227
Accident Year 2014 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	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	11,087	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	11,746	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	14,825	11,638	$ 8,969
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	12,689	$ 8,838
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net	$ 7,366

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, 2020	Dec. 31, 2019	Mar. 31, 2019
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		$ 122,044
Total reinsurance recoverable on unpaid property and casualty claims	$ 89,020	87,083	$ 99,615
Total gross liability for unpaid Property and Casualty claims and claim adjustment expense		$ 209,127

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, 2019
Average annual Percentage Payout [Abstract]
Year 1	54.40%
Year 2	20.50%
Year 3	10.20%
Year 4	3.60%
Year 5	5.90%
Year 6	0.10%
Year 7	0.00%

Leases (Narratives) (Details)

Leases (Narratives) (Details) $ in Millions	12 Months Ended
	Mar. 31, 2020USD ($)
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	20.2
Cash paid for finance leases	$ 25.9

Leases (Components Right Of Use

Leases (Components Right Of Use Assets) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Finance Lease [Abstract]
Building and Improvements	$ 125,547
Furniture and equipment	21,113
Rental trailers and rental equipment	116,072
Rental trucks	1,738,081
Right Of Use Assets Gross	2,000,813
less: accumulated depreciation	(813,829)
Right of use assets, net	1,186,984
Finance Lease [Member]
Finance Lease [Abstract]
Building and Improvements	0
Furniture and equipment	21,113
Rental trailers and rental equipment	116,072
Rental trucks	1,738,081
Right Of Use Assets Gross	1,875,266
less: accumulated depreciation	(794,913)
Right of use assets, net	1,080,353
Operating Lease [Member]
Finance Lease [Abstract]
Building and Improvements	125,547
Furniture and equipment	0
Rental trailers and rental equipment	0
Rental trucks	0
Right Of Use Assets Gross	125,547
less: accumulated depreciation	(18,916)
Right of use assets, net	$ 106,631

Leases (Weighted Average Discou

Leases (Weighted Average Discount Rate) (Details)	12 Months Ended
	Mar. 31, 2020
Weighted Average Remaining Lease Term [Abstract]
Remaining Lease Term Fianance Lease Weighted Average	4 Years
Remaining Lease Term Operating Lease Weighted Average	14 Years
Weighted Average Discount Rate [Abstract]
Finance Lease Weighted Average Discount Rate Percent	3.50%
Operating Lease Weighted Average Discount Rate Percent	4.60%

Leases (Components Of Lease Exp

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

Leases (Maturities Of Lease Lia

Leases (Maturities Of Lease Liabilities) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Finance Lease Liabilities Payments Due [Abstract]
2021	$ 218,424
2022	164,190
2023	124,160
2024	106,156
2025	75,502
Thereafter	46,438
Total lease payments	734,870
Less: imputed interest	0
Finance Lease Liability	734,870
Operating Lease Liabilities Payments Due [Abstract]
2021	23,782
2022	22,001
2023	21,238
2024	20,616
2025	9,701
Thereafter	64,806
Total lease payments	162,144
Less: imputed interest	55,701
Operating Lease Liability	$ 106,443

Leases (Lease Commitments For L

Leases (Lease Commitments For Lease Terms Of More Than One Year (Details) $ in Thousands	Mar. 31, 2020USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2021	$ 22,854
2022	16,927
2023	13,250
2024	9,834
2025	7,102
Thereafter	58,379
Operating and Ground Lease Commitments [Member]
Operating Leases Future Minimum Payments Due [Abstract]
2021	20,852
2022	18,495
2023	16,750
2024	16,317
2025	15,736
Thereafter	54,683
Total	$ 142,833

Contingencies (Narratives) (Det

Contingencies (Narratives) (Details) - Covid 19 Pandemic $ in Millions	12 Months Ended
	Mar. 31, 2020USD ($)
Unusual Or Infrequent Item Net Gain Loss [Abstract]
Decline in product and service revenue, percentage	30.00%
Revenue loss due to pandemic	$ 39.5
CARES act, refund estimate	$ 381

Related Party Transactions (Nar

Related Party Transactions (Narratives) (Details) - Sac Holdings, Mercury, Four Sac, Five Sac, Galaxy and Private Mini [Member] - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Mar. 31, 2018
Related party notes receivable:
Proceeds From Sale Of Property Held For Sale		$ 15
Payments To Acquire Buildings		$ 11.5
Property Management Fee [Abstract]
Management fees received exclusive of reimbursed expenses	$ 29		$ 30	$ 29.5
Related party costs and expenses:
Revenue, excluding dealer agreement commissions and expenses	24
Expenses, related parties	2.6
Cash flow, related party	21.5
Revenue, generated by the dealer agreement from related parties	293.6
Commission expenses, generated from dealer agreement with related parties	$ 62.1
Minimum [Member]
Property Management Fee [Abstract]
Management fee rate	4.00%
Maximum [Member]
Property Management Fee [Abstract]
Management fee rate	10.00%

Related Party Transactions (Rel

Related Party Transactions (Related Party Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Related party transactions:
Management fees revenue	$ 30,406	$ 29,148	$ 29,602
Blackwater [Member]
Related party transactions:
Interest income revenue	0	0	3,326
Management fees revenue	24,014	23,986	23,577
Mercury [Member]
Related party transactions:
Management fees revenue	$ 6,392	$ 5,162	$ 6,025

Related Party Transactions (R_2

Related Party Transactions (Related Party Costs and Expenses) (Details) - Blackwater [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Related Party Cost and Expense [Abstract]
U-Haul lease expenses	$ 2,631	$ 2,678	$ 2,684
U-Haul commission expenses	$ 62,066	$ 61,434	$ 58,595

Related Party Transactions (R_3

Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Related party assets:
U-Haul receivables	$ 9,828	$ 5,523
Related party assets	34,784	30,889
Blackwater [Member]
Related party assets:
Notes receivable	25,293	25,158
Mercury [Member]
Related party assets:
Notes receivable	9,893	7,234
Insurance Subsidiaries [Member]
Related party assets:
Other	$ (402)	$ (1,503)

Statutory Financial Informati_3

Statutory Financial Information of Insurance Subsidiaries (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 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	$ 21.6
Restricted net assets, subsidiaries	$ 98.5		$ 130.2
Life Insurance [Member] | Oxford [Member]
Statutory financial information of insurance subsidiaries:
Statutory accounting practices, statutory amount available for dividend payments		$ 18.6

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Repwest [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	$ 28,614	$ 23,960	$ 16,328
Audited statutory capital and surplus	226,999	216,763	197,375
ARCOA [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	2,906	1,612	1,190
Audited statutory capital and surplus	12,851	9,390	7,991
Oxford [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	18,599	11,367	10,350
Audited statutory capital and surplus	223,264	203,723	195,931
CFLIC [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	8,043	8,735	8,062
Audited statutory capital and surplus	26,305	27,232	26,653
NAI [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	1,942	1,436	1,594
Audited statutory capital and surplus	$ 13,371	$ 12,817	$ 12,674

Financial Information by Geog_3

Financial Information by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Fiscal year ended:
Total revenues	$ 3,978,868	$ 3,768,707	$ 3,601,114
Depreciation and amortization, net of (gains) losses on disposals	667,524	582,555	372,347
Pretax earnings	378,124	477,529	637,613
Identifiable assets	13,438,024	11,891,713	10,747,422
United States [Member]
Fiscal year ended:
Total revenues	3,797,849	3,597,285	3,435,821
Depreciation and amortization, net of (gains) losses on disposals	652,110	575,134	363,826
Interest expense	157,595	139,573	123,777
Pretax earnings	372,687	466,175	628,901
Income tax expense	(65,842)	103,578	(155,685)
Identifiable assets	13,016,942	11,526,876	10,425,299
Canada [Member]
Fiscal year ended:
Total revenues	181,019	171,422	165,293
Depreciation and amortization, net of (gains) losses on disposals	15,414	7,421	8,521
Interest expense	3,355	2,872	2,929
Pretax earnings	5,437	11,354	8,712
Income tax expense	1,918	3,094	2,715
Identifiable assets	$ 421,082	$ 364,837	$ 322,123

Consolidating financial infor_3

Consolidating financial information by industry segment (Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Mar. 31, 2017
ASSETS:
Cash and cash equivalents	$ 494,352		$ 673,701		$ 759,388	$ 697,806
Reinsurance recoverables and trade receivables, net	186,672		224,785
Inventories, net	101,083		103,504
Prepaid expenses	562,904		174,100
Investments, fixed maturities and marketable equities	2,492,738		2,235,397
Investments, other	360,373		300,736
Deferred policy acquisition costs, net	103,118		136,276
Other assets	71,956		78,354
Right of use assets, financing, net	1,080,353		0
Right of use assets, operating	106,631		0
Related party assets	34,784		30,889
Subtotal assets	5,594,964		3,957,742
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	1,032,945		976,454
Buildings and improvements	4,663,461		4,003,726
Furniture and equipment	752,363		689,780
Property, plant and equipment (gross)	10,556,222		11,022,027
Less: Accumulated depreciation	(2,713,162)		(3,088,056)
Total property, plant and equipment	7,843,060		7,933,971
Total assets	13,438,024		11,891,713		10,747,422
Liabilities:
Accounts payable and accrued expenses	554,353		556,873
Notes, loans and leases payable	4,621,291		4,163,323
Operating lease liabilities	106,443		0
Policy benefits and losses, claims and loss expenses payable	997,647		1,011,183
Liabilities from investment contracts	1,802,217		1,666,742
Other policyholders' funds and liabilities	10,190		15,047
Deferred income	31,620		35,186
Deferred income taxes	1,093,543		750,970
Related party liabilities	0		0
Total liabilities	9,217,304		8,199,324
Stockholders' equity:
Additional paid-in capital	453,819		453,326
Accumulated other comprehensive loss	34,652		(66,698)
Retained earnings	4,399,402		3,976,962
Unearned employee stock ownership plan shares	0		(4,048)
Total stockholders' equity	4,220,720		3,692,389
Total liabilities and stockholders' equity	13,438,024		11,891,713
Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	511,520		590,039
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	3,595,933		4,762,028
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	459,078		643,918		702,036	671,665
Reinsurance recoverables and trade receivables, net	60,073		90,832
Inventories, net	101,083		103,504
Prepaid expenses	562,904		174,100
Investments, fixed maturities and marketable equities	0		0
Investments, other	20,988		23,013
Deferred policy acquisition costs, net	0		0
Other assets	69,128		72,768
Right of use assets, financing, net	1,080,353
Right of use assets, operating	106,631
Related party assets	41,027		35,997
Subtotal assets	2,501,265		1,144,132
Investments in subsidiaries	668,498		534,157
Property, plant and equipment, at cost:
Land	1,032,945		976,454
Buildings and improvements	4,663,461		4,003,726
Furniture and equipment	752,363		689,780
Property, plant and equipment (gross)	10,556,222		11,022,027
Less: Accumulated depreciation	(2,713,162)		(3,088,056)
Total property, plant and equipment	7,843,060		7,933,971
Total assets	11,012,823		9,612,260
Liabilities:
Accounts payable and accrued expenses	545,685		548,099
Notes, loans and leases payable	4,609,844		4,163,323
Operating lease liabilities	106,443
Policy benefits and losses, claims and loss expenses payable	410,107		407,934
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	31,620		35,186
Deferred income taxes	1,063,681		741,644
Related party liabilities	24,275		25,446
Total liabilities	6,791,655		5,921,632
Stockholders' equity:
Additional paid-in capital	454,029		453,536
Accumulated other comprehensive loss	35,100		(68,459)
Retained earnings	4,399,192		3,976,752
Unearned employee stock ownership plan shares	0		(4,048)
Total stockholders' equity	4,221,168		3,690,628
Total liabilities and stockholders' equity	11,012,823		9,612,260
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	511,520		590,039
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	3,595,933		4,762,028
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	4,794		5,757		6,639	12,725
Reinsurance recoverables and trade receivables, net	93,995		102,120
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	288,998		279,641
Investments, other	90,145		74,679
Deferred policy acquisition costs, net	0		0
Other assets	680		2,456
Right of use assets, financing, net	0
Right of use assets, operating	0
Related party assets	7,137		6,639
Subtotal assets	485,749		471,292
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	485,749		471,292
Liabilities:
Accounts payable and accrued expenses	5,530		2,844
Notes, loans and leases payable	0		0
Operating lease liabilities	0
Policy benefits and losses, claims and loss expenses payable	210,341	$ 210,341	229,958	$ 229,958
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	5,751		5,259
Deferred income	0		0
Deferred income taxes	8,447		6,961
Related party liabilities	4,616		3,836
Total liabilities	234,685		248,858
Stockholders' equity:
Additional paid-in capital	91,120		91,120
Accumulated other comprehensive loss	12,581		(3,721)
Retained earnings	144,062		131,734
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	251,064		222,434
Total liabilities and stockholders' equity	485,749		471,292
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	30,480		24,026		50,713	13,416
Reinsurance recoverables and trade receivables, net	32,604		31,833
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	2,203,740		1,955,756
Investments, other	249,240		203,044
Deferred policy acquisition costs, net	103,118		136,276
Other assets	2,148		3,130
Right of use assets, financing, net	0
Right of use assets, operating	0
Related party assets	18,629		16,466
Subtotal assets	2,639,959		2,370,531
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	0		0
Buildings and improvements	0		0
Furniture and equipment	0		0
Property, plant and equipment (gross)	0		0
Less: Accumulated depreciation	0		0
Total property, plant and equipment	0		0
Total assets	2,639,959		2,370,531
Liabilities:
Accounts payable and accrued expenses	3,138		5,930
Notes, loans and leases payable	11,447		0
Operating lease liabilities	0
Policy benefits and losses, claims and loss expenses payable	377,199		373,291
Liabilities from investment contracts	1,802,217		1,666,742
Other policyholders' funds and liabilities	4,439		9,788
Deferred income	0		0
Deferred income taxes	21,415		2,365
Related party liabilities	2,670		692
Total liabilities	2,222,525		2,058,808
Stockholders' equity:
Additional paid-in capital	26,271		26,271
Accumulated other comprehensive loss	78,550		(5,300)
Retained earnings	310,113		288,252
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	417,434		311,723
Total liabilities and stockholders' equity	2,639,959		2,370,531
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
Right of use assets, operating	0
Related party assets	(32,009)		(28,213)
Subtotal assets	(32,009)		(28,213)
Investments in subsidiaries	(668,498)		(534,157)
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	(700,507)		(562,370)
Liabilities:
Accounts payable and accrued expenses	0		0
Notes, loans and leases payable	0		0
Operating lease liabilities	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	(31,561)		(29,974)
Total liabilities	(31,561)		(29,974)
Stockholders' equity:
Additional paid-in capital	(117,601)		(117,601)
Accumulated other comprehensive loss	(91,579)		10,782
Retained earnings	(453,965)		(419,776)
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	(668,946)		(532,396)
Total liabilities and stockholders' equity	(700,507)		(562,370)
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, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Self-moving equipment rentals	$ 2,692,413	$ 2,653,497	$ 2,479,742
Self-storage revenues	418,741	367,276	323,903
Self-moving and self-storage products and service sales	265,091	264,146	261,557
Property management fees	30,406	29,148	29,602
Life insurance premiums	127,976	63,488	154,703
Property and casualty insurance premiums	66,053	60,853	57,100
Net investment and interest income	137,829	110,934	110,473
Other revenue	240,359	219,365	184,034
Total revenues	3,978,868	3,768,707	3,601,114
Costs and expenses:
Operating expenses	2,117,148	1,981,180	1,807,056
Commission expenses	288,332	288,408	276,705
Cost of sales	164,018	162,142	160,489
Benefits and losses	174,836	100,277	185,311
Amortization of deferred policy acquisition costs	31,219	28,556	24,514
Lease expense	26,882	33,158	33,960
Depreciation, net of (gains) losses on disposals	637,063	554,043	543,247
Net gains on disposal of real estate	(758)	(44)	(195,414)
Total costs and expenses	3,438,740	3,147,720	2,835,868
Earnings from operations before equity in earnings of subsidiaries	540,128	620,987	765,246
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	540,128	620,987	765,246
Pretax earnings	378,124	477,529	637,613
Earnings available to common shareholders	442,048	370,857	790,583
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Revenues:
Self-moving equipment rentals	2,696,516	2,656,327	2,483,956
Self-storage revenues	418,741	367,276	323,903
Self-moving and self-storage products and service sales	265,091	264,146	261,557
Property management fees	30,406	29,148	29,602
Life insurance premiums	0	0	0
Property and casualty insurance premiums	0	0	0
Net investment and interest income	10,593	13,857	12,232
Other revenue	236,419	215,055	179,417
Total revenues	3,657,766	3,545,809	3,290,667
Costs and expenses:
Operating expenses	2,069,655	1,938,317	1,758,697
Commission expenses	288,332	288,408	276,705
Cost of sales	164,018	162,142	160,489
Benefits and losses	0	0	0
Amortization of deferred policy acquisition costs	0	0	0
Lease expense	27,494	33,702	34,243
Depreciation, net of (gains) losses on disposals	637,063	554,043	543,247
Net gains on disposal of real estate	(758)	(44)	(195,414)
Total costs and expenses	3,185,804	2,976,568	2,577,967
Earnings from operations before equity in earnings of subsidiaries	471,962	569,241	712,700
Equity in earnings of subsidiaries	55,789	41,811	46,990
Earnings from operations	527,751	611,052	759,690
Other components of net periodic benefit costs	(1,054)	(1,013)	(927)
Interest expense	(162,062)	(143,586)	(127,997)
Pretax earnings	364,635	466,453	630,766
Income tax expense	77,413	(95,596)	159,817
Earnings available to common shareholders	442,048	370,857	790,583
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	69,141	63,488	58,800
Net investment and interest income	19,923	12,349	15,771
Other revenue	0	0	0
Total revenues	89,064	75,837	74,571
Costs and expenses:
Operating expenses	33,770	34,218	32,710
Commission expenses	0	0	0
Cost of sales	0	0	0
Benefits and losses	12,410	14,213	15,983
Amortization of deferred policy acquisition costs	0	0	0
Lease expense	0	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	46,180	48,431	48,693
Earnings from operations before equity in earnings of subsidiaries	42,884	27,406	25,878
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	42,884	27,406	25,878
Other components of net periodic benefit costs	0	0	0
Interest expense	0	0	0
Pretax earnings	42,884	27,406	25,878
Income tax expense	(8,956)	(5,698)	(2,989)
Earnings available to common shareholders	33,928	21,708	22,889
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	127,976	63,488	154,703
Property and casualty insurance premiums	0	0	0
Net investment and interest income	109,018	86,395	84,158
Other revenue	4,470	4,831	5,001
Total revenues	241,464	154,714	243,862
Costs and expenses:
Operating expenses	21,425	14,613	22,061
Commission expenses	0	0	0
Cost of sales	0	0	0
Benefits and losses	162,426	86,064	169,328
Amortization of deferred policy acquisition costs	31,219	28,556	24,514
Lease expense	0	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	215,070	129,233	215,903
Earnings from operations before equity in earnings of subsidiaries	26,394	25,481	27,959
Equity in earnings of subsidiaries	0	0	0
Earnings from operations	26,394	25,481	27,959
Other components of net periodic benefit costs	0	0	0
Interest expense	0	0	0
Pretax earnings	26,394	25,481	27,959
Income tax expense	(4,533)	(5,378)	(3,858)
Earnings available to common shareholders	21,861	20,103	24,101
Eliminations [Member]
Revenues:
Self-moving equipment rentals	(4,103)	(2,830)	(4,214)
Self-storage revenues	0	0	0
Self-moving and self-storage products and service sales	0	0	0
Property management fees	0	0	0
Life insurance premiums	0	0	0
Property and casualty insurance premiums	(3,088)	(2,635)	(1,700)
Net investment and interest income	(1,705)	(1,667)	(1,688)
Other revenue	(530)	(521)	(384)
Total revenues	(9,426)	(7,653)	(7,986)
Costs and expenses:
Operating expenses	(7,702)	(5,968)	(6,412)
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	(612)	(544)	(283)
Depreciation, net of (gains) losses on disposals	0	0	0
Net gains on disposal of real estate	0	0	0
Total costs and expenses	(8,314)	(6,512)	(6,695)
Earnings from operations before equity in earnings of subsidiaries	(1,112)	(1,141)	(1,291)
Equity in earnings of subsidiaries	(55,789)	(41,811)	(46,990)
Earnings from operations	(56,901)	(42,952)	(48,281)
Other components of net periodic benefit costs	0	0	0
Interest expense	1,112	1,141	1,291
Pretax earnings	(55,789)	(41,811)	(46,990)
Income tax expense	0	0	0
Earnings available to common shareholders	$ (55,789)	$ (41,811)	$ (46,990)

Consolidating financial infor_5

Consolidating financial information by industry segment (Cash Flow Statements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flow from operating activities:
Net earnings	$ 442,048	$ 370,857	$ 790,583
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,120	581,025	555,069
Amortization of deferred policy acquisition costs	31,219	28,556	24,514
Amortization of premiums and accretion of discounts related to investments, net	13,317	13,107	12,790
Amortization of debt issuance costs	4,426	3,923	3,868
Interest credited to policyholders	51,857	35,387	32,302
Change in allowance for losses on trade receivables	(14)	52	(120)
Change in allowance for inventory reserves	640	(146)	5,065
Net gains on disposal of real estate	(758)	(44)	(195,414)
Net gains on sales of investments	(13,596)	(2,663)	(6,269)
Net losses on equity investments	(3,783)	5,739	0
Deferred income taxes	317,893	106,811	(193,434)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	38,129	(31,365)	(15,329)
Inventories and parts	1,776	(13,492)	(12,384)
Prepaid expenses	(391,120)	(8,620)	(40,765)
Capitalization of deferred policy acquisition costs	(24,447)	(25,957)	(27,350)
Other assets	(1,295)	157,152	(165,968)
Related party assets	(5,645)	4,194	53,408
Accounts payable and accrued expenses	(4,530)	10,263	(36,980)
Policy benefits and losses, claims and loss expenses payable	(12,618)	(236,120)	161,121
Other policyholders' funds and liabilities	(4,857)	5,007	(109)
Deferred income	(1,818)	966	5,524
Related party liabilities	1,626	(2,067)	(616)
Net cash provided by operating activities	1,075,513	975,583	937,684
Cash flow from investing activities:
Escrow deposits	6,617	4,299	31,362
Purchase of:
Property, plant and equipment	(2,309,406)	(1,869,968)	(1,363,745)
Short term investments	(61,226)	(54,048)	(63,556)
Fixed maturities investments	(379,349)	(540,045)	(390,900)
Equity securities	(83)	(957)	(662)
Preferred stock	0	0	(1,000)
Real estate	(4,286)	(635)	(1,939)
Mortgage loans	(62,016)	(63,611)	(83,507)
Proceeds from sale and paydowns of:
Property, plant and equipment	687,375	606,271	699,803
Short term investments	59,056	66,037	67,790
Fixed maturities investments	268,636	123,551	163,469
Equity securities	185	8,608	0
Preferred stock	2,375	1,625	4,208
Real estate	311	0	2,783
Mortgage loans	25,162	147,737	37,590
Net cash used by investing activities	(1,766,649)	(1,571,136)	(898,304)
Cash flow from financing activities:
Borrowings from credit facilities	1,121,412	897,311	498,464
Principal repayments on credit facilities	(349,986)	(299,748)	(356,451)
Debt issuance costs	(5,332)	(7,243)	(5,111)
Capital lease payments	(307,782)	(303,431)	(296,363)
Employee stock ownership plan			(11,640)
Securitization deposits	0	0	(2,180)
Common stock dividends paid	(29,404)	(39,179)	(29,380)
Net contribution from (to) related party	0
Investment contract deposits	234,640	400,123	401,814
Investment contract withdrawals	(151,022)	(132,833)	(182,549)
Net cash provided by financing activities	512,320	514,582	16,604
Effects of exchange rate on cash	(533)	(4,716)	5,598
Increase (decrease) in cash and cash equivalents	(179,349)	(85,687)	61,582
Cash and cash equivalents at the beginning of period	673,701	759,388	697,806
Cash and cash equivalents at the end of the period	494,352	673,701	759,388
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Cash flow from operating activities:
Net earnings	442,048	370,857	790,583
Earnings from consolidated subsidiaries	(55,789)	(41,811)	(46,990)
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,120	581,025	555,069
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	4,426	3,923	3,868
Interest credited to policyholders	0	0	0
Change in allowance for losses on trade receivables	(14)	57	(31)
Change in allowance for inventory reserves	640	(146)	5,065
Net gains on disposal of personal property	(27,057)	(26,982)	(11,822)
Net gains on disposal of real estate	(758)	(44)	(195,414)
Net gains on sales of investments	0	0	0
Net losses on equity investments	0	0
Deferred income taxes	323,980	112,434	(182,358)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	30,771	(26,160)	(23,444)
Inventories and parts	1,776	(13,492)	(12,384)
Prepaid expenses	(391,120)	(8,620)	(40,765)
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	(3,099)	159,126	(167,579)
Related party assets	(5,106)	3,857	48,855
Accounts payable and accrued expenses	(4,428)	6,454	(36,384)
Policy benefits and losses, claims and loss expenses payable	3,092	(159,793)	168,687
Other policyholders' funds and liabilities	0	0	0
Deferred income	(1,818)	966	5,524
Related party liabilities	(1,170)	(2,711)	(1,884)
Net cash provided by operating activities	980,494	958,940	858,596
Cash flow from investing activities:
Escrow deposits	6,617	4,299	31,362
Purchase of:
Property, plant and equipment	(2,309,406)	(1,869,968)	(1,363,745)
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	(236)	(1,365)
Mortgage loans	0	0	0
Proceeds from sale and paydowns of:
Property, plant and equipment	687,375	606,271	699,803
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0
Preferred stock	0	0	0
Real estate	311	0	2,783
Mortgage loans	0	0	0
Net cash used by investing activities	(1,615,103)	(1,259,634)	(631,162)
Cash flow from financing activities:
Borrowings from credit facilities	1,118,912	897,311	498,464
Principal repayments on credit facilities	(347,486)	(299,748)	(356,451)
Debt issuance costs	(5,332)	(7,243)	(5,111)
Capital lease payments	(307,782)	(303,431)	(296,363)
Employee stock ownership plan	(206)	(418)	(11,640)
Securitization deposits	0		(2,180)
Common stock dividends paid	(29,404)	(39,179)	(29,380)
Net contribution from (to) related party	21,600
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	450,302	247,292	(202,661)
Effects of exchange rate on cash	(533)	(4,716)	5,598
Increase (decrease) in cash and cash equivalents	(184,840)	(58,118)	30,371
Cash and cash equivalents at the beginning of period	643,918	702,036	671,665
Cash and cash equivalents at the end of the period	459,078	643,918	702,036
Operating Segments [Member] | Property and Casualty Insurance [Member]
Cash flow from operating activities:
Net earnings	33,928	21,708	22,889
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	1,469	1,361	1,356
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	(355)	(2,971)	(1,703)
Net losses on equity investments	(3,783)	5,739
Deferred income taxes	(2,847)	830	(6,596)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	8,127	(2,438)	8,075
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	2,098	(1,449)	1,810
Related party assets	(539)	339	4,553
Accounts payable and accrued expenses	2,688	257	648
Policy benefits and losses, claims and loss expenses payable	(19,618)	(4,400)	(10,623)
Other policyholders' funds and liabilities	491	(117)	1,194
Deferred income	0	0	0
Related party liabilities	819	944	318
Net cash provided by operating activities	22,478	19,803	21,921
Cash flow from investing activities:
Escrow deposits	0	0	0
Purchase of:
Property, plant and equipment	0	0	0
Short term investments	(60,590)	(53,878)	(63,556)
Fixed maturities investments	(13,001)	(33,775)	(51,273)
Equity securities	0	0	0
Preferred stock	0	0	(1,000)
Real estate	(328)	(187)	(440)
Mortgage loans	(18,050)	(20,031)	(14,409)
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	59,056	58,767	61,133
Fixed maturities investments	25,386	12,305	21,670
Equity securities	185	8,608
Preferred stock	1,375	1,625	4,208
Real estate	0	0	0
Mortgage loans	4,126	5,881	15,660
Net cash used by investing activities	(1,841)	(20,685)	(28,007)
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	0	0	0
Securitization deposits	0		0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	(21,600)
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	(21,600)	0	0
Effects of exchange rate on cash	0	0	0
Increase (decrease) in cash and cash equivalents	(963)	(882)	(6,086)
Cash and cash equivalents at the beginning of period	5,757	6,639	12,725
Cash and cash equivalents at the end of the period	4,794	5,757	6,639
Operating Segments [Member] | Life Insurance [Member]
Cash flow from operating activities:
Net earnings	21,861	20,103	24,101
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	31,219	28,556	24,514
Amortization of premiums and accretion of discounts related to investments, net	11,848	11,746	11,434
Amortization of debt issuance costs	0	0	0
Interest credited to policyholders	51,857	35,387	32,302
Change in allowance for losses on trade receivables	0	(5)	(89)
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	(13,241)	308	(4,566)
Net losses on equity investments	0	0
Deferred income taxes	(3,240)	(6,453)	(4,480)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(769)	(2,767)	40
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	(24,447)	(25,957)	(27,350)
Other assets	(294)	(525)	(199)
Related party assets	0	(2)	0
Accounts payable and accrued expenses	(2,790)	3,552	(1,244)
Policy benefits and losses, claims and loss expenses payable	3,908	(71,927)	3,057
Other policyholders' funds and liabilities	(5,348)	5,124	(1,303)
Deferred income	0	0	0
Related party liabilities	1,977	(300)	950
Net cash provided by operating activities	72,541	(3,160)	57,167
Cash flow from investing activities:
Escrow deposits	0	0	0
Purchase of:
Property, plant and equipment	0	0	0
Short term investments	(636)	(170)	0
Fixed maturities investments	(366,348)	(506,270)	(339,627)
Equity securities	(83)	(957)	(662)
Preferred stock	0	0	0
Real estate	(3,958)	(212)	(134)
Mortgage loans	(43,966)	(43,580)	(69,098)
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	0	7,270	6,657
Fixed maturities investments	243,250	111,246	141,799
Equity securities	0	0
Preferred stock	1,000	0	0
Real estate	0	0	0
Mortgage loans	21,036	141,856	21,930
Net cash used by investing activities	(149,705)	(290,817)	(239,135)
Cash flow from financing activities:
Borrowings from credit facilities	2,500	0	0
Principal repayments on credit facilities	(2,500)	0	0
Debt issuance costs	0	0	0
Capital lease payments	0	0	0
Employee stock ownership plan	0	0	0
Securitization deposits	0		0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	0
Investment contract deposits	234,640	400,123	401,814
Investment contract withdrawals	(151,022)	(132,833)	(182,549)
Net cash provided by financing activities	83,618	267,290	219,265
Effects of exchange rate on cash	0	0	0
Increase (decrease) in cash and cash equivalents	6,454	(26,687)	37,297
Cash and cash equivalents at the beginning of period	24,026	50,713	13,416
Cash and cash equivalents at the end of the period	30,480	24,026	50,713
Eliminations [Member]
Cash flow from operating activities:
Net earnings	(55,789)	(41,811)	(46,990)
Earnings from consolidated subsidiaries	55,789	41,811	46,990
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
Deferred income taxes	0	0	0
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	0	0	0
Inventories and parts	0	0	0
Prepaid expenses	0	0	0
Capitalization of deferred policy acquisition costs	0	0	0
Other assets	0	0	0
Related party assets	0	0	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	0	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	0	0
Real estate	0	0	0
Mortgage loans	0	0	0
Proceeds from sale and paydowns of:
Property, plant and equipment	0	0	0
Short term investments	0	0	0
Fixed maturities investments	0	0	0
Equity securities	0	0
Preferred stock	0	0	0
Real estate	0	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	0	0	0
Securitization deposits	0		0
Common stock dividends paid	0	0	0
Net contribution from (to) related party	0
Investment contract deposits	0	0	0
Investment contract withdrawals	0	0	0
Net cash provided by financing activities	0	0	0
Effects of exchange rate on cash	0	0	0
Increase (decrease) 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, 2020USD ($)
Contract With Customer Liability [Abstract]
2021	$ 22,854
2022	16,927
2023	13,250
2024	9,834
2025	7,102
Thereafter	58,379
Self Moving Equipment
Contract With Customer Liability [Abstract]
2021	2,139
2022	0
2023	0
2024	0
2025	0
Thereafter	0
Property Lease Revenue
Contract With Customer Liability [Abstract]
2021	20,715
2022	16,927
2023	13,250
2024	9,834
2025	7,102
Thereafter	$ 58,379

Revenue Recognition (Revenue di

Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenues recognized over time	$ 147,565	$ 2,814,732	$ 2,617,990
Revenues recognized at point in time	309,804	305,408	301,152
Total revenues recognized under ASC 606	457,369	3,120,140	2,919,142
Revenues recognized under ASC 840	3,182,902	406,070	353,924
Revenues recognized under ASC 944	200,768	131,563	217,575
Revenues recognized under ASC 320	137,829	110,934	110,473
Total revenues	$ 3,978,868	$ 3,768,707	$ 3,601,114

Subsequent Events (Narratives)

Subsequent Events (Narratives) (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	May 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Apr. 01, 2020
Debt Instruments [Abstract]
Subsidiary cash dividend paid to parent			$ 0
Subsequent Event [Member] | Long Term Debt [Member]
Debt Instruments [Abstract]
Expansion of credit facility, borrowed amount		$ 50,000
Subsequent Event [Member] | Short Term Debt [Member]
Debt Instruments [Abstract]
Short term line of credit	$ 200,000
Debt Instrument, Interest Rate, Effective Percentage [Abstract]
Sum of LIBOR and margin, maximum rate				2.00%
Subsequent Event [Member] | Dividend Paid [Member]
Debt Instruments [Abstract]
Subsidiary cash dividend paid to parent		$ 18,600

Schedule I - Condensed Financ_2

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

Schedule I - Condensed Financ_3

Schedule I - Condensed Financial Information of AMERCO (Balance Sheets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
ASSETS:
Cash and cash equivalents	$ 494,352	$ 673,701	$ 759,388	$ 697,806
Investments in subsidiaries	0	0
Related party assets	34,784	30,889
Total assets	13,438,024	11,891,713	10,747,422
Liabilities:
Other Liabilities	9,217,304	8,199,324
Stockholders' equity:
Additional paid-in capital	453,819	453,326
Accumulated other comprehensive loss	34,652	(66,698)
Consolidated statement of change in equity
Beginning of period	3,976,962
Adjustments for adoption of ASU 2016-01		0
Net earnings	442,048	370,857	790,583
End of period	4,399,402	3,976,962
Total stockholders' equity	4,220,720	3,692,389
Total liabilities and stockholders' equity	13,438,024	11,891,713
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	294,528	428,950	469,209	$ 361,231
Investments in subsidiaries	2,758,509	2,474,671
Related party assets	1,734,358	1,424,274
Other assets	502,064	120,896
Total assets	5,289,459	4,448,791
Liabilities:
Other Liabilities	1,068,291	754,115
Stockholders' equity:
Preferred stock	0	0
Common stock	10,497	10,497
Additional paid-in capital	454,029	453,536
Accumulated other comprehensive loss	35,100	(68,459)
Consolidated statement of change in equity
Adjustments for adoption of ASU 2016-01	0	9,724
Net earnings	442,048	370,857	$ 790,583
Dividends	(19,608)	(39,180)
Total stockholders' equity	4,221,168	3,694,676
Total liabilities and stockholders' equity	5,289,459	4,448,791
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, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Net interest income from subs	$ 3,978,868	$ 3,768,707	$ 3,601,114
Expenses:
Operating expenses	2,117,148	1,981,180	1,807,056
Total costs and expenses	3,438,740	3,147,720	2,835,868
Equity in earnings of subsidiaries	0	0	0
Pretax earnings	378,124	477,529	637,613
Earnings available to common shareholders	$ 442,048	$ 370,857	$ 790,583
Basic and diluted earnings per common share	$ 22.55	$ 18.93	$ 40.36
Weighted average common shares outstanding: basic and diluted	19,603,708	19,592,048	19,588,889
Amerco [Member]
Revenues:
Net interest income from subs	$ 6,586	$ 8,601	$ 4,606
Expenses:
Operating expenses	10,622	8,840	7,003
Other expenses	96	93	91
Total costs and expenses	10,718	8,933	7,094
Equity in earnings of subsidiaries	205,940	279,589	681,786
Interest income	130,670	112,649	120,549
Pretax earnings	332,478	391,906	799,847
Income tax expense	109,570	(21,049)	(9,264)
Earnings available to common shareholders	$ 442,048	$ 370,857	$ 790,583
Basic and diluted earnings per common share	$ 22.55	$ 18.93	$ 40.36
Weighted average common shares outstanding: basic and diluted	19,603,708	19,592,048	19,588,889

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, 2020	Mar. 31, 2019	Mar. 31, 2018
Net earnings	$ 442,048	$ 370,857	$ 790,583
Amerco [Member]
Net earnings	442,048	370,857	790,583
Other comprehensive income (loss)	101,350	(62,075)	37,873
Total comprehensive income	$ 543,398	$ 308,782	$ 828,456

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, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flow from operating activities:
Net earnings	$ 442,048	$ 370,857	$ 790,583
Earnings from consolidated subsidiaries	0	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	664,120	581,025	555,069
Net loss on sales of investments	(13,596)	(2,663)	(6,269)
Deferred income taxes	317,893	106,811	(193,434)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	38,129	(31,365)	(15,329)
Prepaid expenses	(391,120)	(8,620)	(40,765)
Other assets	(1,295)	157,152	(165,968)
Related party assets	(5,645)	4,194	53,408
Accounts payable and accrued expenses	(4,530)	10,263	(36,980)
Net cash provided by operating activities	1,075,513	975,583	937,684
Cash flow from investing activities:
Purchases of property, plant and equipment	(2,309,406)	(1,869,968)	(1,363,745)
Proceeds of equity securities	185	8,608	0
Net cash used by investing activities	(1,766,649)	(1,571,136)	(898,304)
Cash flow from financing activities:
Common stock dividends paid	(29,404)	(39,179)	(29,380)
Net contribution from (to) related party	0
Net Cash Provided by (Used in) Financing Activities	512,320	514,582	16,604
Effects of exchange rate on cash	(533)	(4,716)	5,598
Increase (decrease) in cash and cash equivalents	(179,349)	(85,687)	61,582
Cash and cash equivalents at the beginning of period	673,701	759,388	697,806
Cash and cash equivalents at the end of the period	494,352	673,701	759,388
Amerco [Member]
Cash flow from operating activities:
Net earnings	442,048	370,857	790,583
Earnings from consolidated subsidiaries	(205,940)	(279,589)	(681,786)
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	1	1	3
Net loss on sales of investments	0	0	0
Deferred income taxes	323,980	112,434	(182,358)
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	0	0	0
Prepaid expenses	(381,190)	(6,289)	(36,516)
Other assets	22	(40)	65
Related party assets	0	0	0
Accounts payable and accrued expenses	1,935	2,260	278
Net cash provided by operating activities	180,856	199,634	(109,731)
Cash flow from investing activities:
Purchases of property, plant and equipment	0	(1)	(1)
Proceeds of equity securities	0	0	0
Net cash used by investing activities	0	(1)	(1)
Cash flow from financing activities:
Proceeds from (repayments) of intercompany loans	(311,534)	(196,382)	250,214
Common stock dividends paid	(29,404)	(39,179)	(29,380)
Net contribution from (to) related party	21,600	0	0
Net Cash Provided by (Used in) Financing Activities	(319,338)	(235,561)	220,834
Effects of exchange rate on cash	4,060	(4,331)	(3,124)
Increase (decrease) in cash and cash equivalents	(134,422)	(40,259)	107,978
Cash and cash equivalents at the beginning of period	428,950	469,209	361,231
Cash and cash equivalents at the end of the period	$ 294,528	$ 428,950	$ 469,209

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, 2020	Mar. 31, 2019	Mar. 31, 2018
Allowance for doubtful accounts (deducted from trade receivable) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 549	$ 496	$ 585
Additions charged to cost and expenses	731	1,550	886
Additions charged to other accounts	0	0	0
Deductions	(745)	(1,497)	(929)
Balance at year end	535	549	496
Allowance for obsolescence (deducted from inventory) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	2,322	5,329	2,050
Additions charged to cost and expenses	741	0	3,279
Additions charged to other accounts	0	0	0
Deductions	0	(3,007)	0
Balance at year end	3,063	2,322	5,329
Allowance for LIFO (deducted from inventory) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	18,987	16,126	14,340
Additions charged to cost and expenses	0	2,861	1,786
Additions charged to other accounts	0	0	0
Deductions	(101)	0	0
Balance at year end	18,886	18,987	16,126
Allowance for probable losses (deducted from mortgage loans) [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	493	618	493
Additions charged to cost and expenses	0	0	125
Additions charged to other accounts	0	0	0
Deductions	0	(125)	0
Balance at year end	$ 493	$ 493	$ 618

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Information For Property And Casualty Insurance Underwriters [Abstract]
Deferred policy acquisition costs	$ 0	$ 0	$ 0
Reserves for unpaid claims and claims adjustment expense	209,127	228,970	233,554
Unearned premiums	69,138	60,853	57,100
Net earned premiums (1)	19,926	9,373	14,079
Net investment income (2)	22,137	19,579	15,749
Claim and claim adjustment expenses incurred related to current year	(9,535)	(5,365)	233
Amortization of deferred policy acquisition costs	0	0	0
Paid claims and claim adjustment expense	24,608	19,228	17,366
Net premiums written (1)	$ 66,277	$ 61,022	$ 57,123

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment Income, Net [Abstract]
Premiums Earned, Net	$ 197,117	$ 124,336	$ 211,803
Property Casualty Insurance Operations [Member] | Amerco [Member]
Investment Income, Net [Abstract]
Written premiums, net	3,100	2,800	2,300
Premiums Earned, Net	2,800	2,600	1,700
(Gain) Loss on Investments	$ 400	$ 3,000	$ 1,700

Uncategorized Items - uhal-2020

Label	Element	Value
Amerco [Member]
Income Taxes Paid, Net	us-gaap_IncomeTaxesPaidNet	$ 6,900,000