Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
ASSETS:
Cash and cash equivalents	$ 1,534,544	$ 2,060,524
Reinsurance recoverables and trade receivables, net	215,908	189,498
Inventories, net	150,940	151,474
Prepaid expenses	246,082	241,711
Available For Sale Securities Debt Securities	2,442,504	2,709,037
Equity securities, at fair value	66,274	61,357
Investments, other	633,936	575,540
Deferred policy acquisition costs, net	121,224	128,463
Other assets	111,743	51,052
Right of use assets - financing, net	289,305	474,765
Right of use assets - operating, net	53,712	58,917
Related party assets	57,934	48,308
Subtotal assets	5,924,106	6,750,646
Property, plant and equipment, at cost:
Land	1,670,033	1,537,206
Buildings and improvements	8,237,354	7,088,810
Furniture and equipment	1,003,770	928,241
Property, plant and equipment (gross)	18,185,784	15,660,293
Less: Accumulated depreciation	(5,051,132)	(4,310,205)
Total property, plant and equipment	13,134,652	11,350,088
Total assets	19,058,758	18,100,734
Liabilities
Accounts payable and accrued expenses	783,084	761,039
Notes, loans and leases payable, net	6,271,362	6,108,042
Operating lease liabilities	55,032	58,373
Policy benefits and losses, claims and loss expenses payable	849,113	880,202
Trading Liabilities	2,411,352	2,398,884
Other policyholders' funds and liabilities	18,070	8,232
Deferred income	51,175	52,282
Deferred income taxes, net	1,447,125	1,329,489
Total liabilities	11,886,313	11,596,543
Commitments and contingencies (Notes 9 and 19)
Stockholders' equity:
Additional paid-in capital	462,548	453,643
Accumulated other comprehensive loss	223,216	285,623
Retained earnings	7,600,090	7,003,148
Total stockholders' equity	7,172,445	6,504,191
Total liabilities and stockholders' equity	19,058,758	18,100,734
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
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
Nonvoting Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	176	176
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:
Rental trailers and other rental equipment	936,303	827,696
Rental Trucks [Member]
Property, plant and equipment, at cost:
Rental trailers and other rental equipment	$ 6,338,324	$ 5,278,340