Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
ASSETS:
Cash and cash equivalents	$ 1,215,568	$ 494,352
Reinsurance recoverables and trade receivables, net	213,397	186,672
Inventories, net	100,595	101,083
Prepaid expenses	447,073	562,904
Investments, fixed maturities and marketable equities	2,495,342	2,492,738
Investments, other	425,527	360,373
Deferred policy acquisition costs, net	93,407	103,118
Other assets	71,314	71,956
Right of use Assets - Financing	970,361	1,080,353
Right of use Assets - Operating	101,946	106,631
Related party assets	32,397	34,784
Subtotal assets	6,166,927	5,594,964
Property, plant and equipment, at cost:
Land	1,052,205	1,032,945
Buildings and improvements	4,863,590	4,663,461
Furniture and equipment	767,290	752,363
Property, plant and equipment (gross)	10,859,224	10,556,222
Less: Accumulated depreciation	(2,902,673)	(2,713,162)
Total property, plant and equipment	7,956,551	7,843,060
Total assets	14,123,478	13,438,024
Liabilities:
Accounts payable and accrued expenses	630,666	554,353
Notes, loans and leases payable	4,701,225	4,621,291
Operating lease liability	101,976	106,443
Policy benefits and losses, claims and loss expenses payable	1,015,189	997,647
Liabilities from investment contracts	1,838,280	1,802,217
Other policyholders' funds and liabilities	5,426	10,190
Deferred income	41,715	31,620
Deferred income taxes, net	1,183,370	1,093,543
Total liabilities	9,517,847	9,217,304
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	453,819	453,819
Accumulated other comprehensive loss	78,156	34,652
Retained earnings	4,740,809	4,399,402
Unearned employee stock ownership plan shares	0	0
Total stockholders' equity	4,605,631	4,220,720
Total liabilities and stockholders' equity	14,123,478	13,438,024
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	0
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	0
Serial Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0	0
Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497	10,497
Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)	(525,653)
Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)	(151,997)
Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	531,465	511,520
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 3,644,674	$ 3,595,933