Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
ASSETS:
Cash and cash equivalents	$ 2,145,131	$ 2,060,524
Reinsurance recoverables and trade receivables, net	212,565	189,498
Inventories, net	161,535	151,474
Prepaid expenses	263,541	241,711
Investments, fixed maturities and marketable equities	2,534,164	2,770,394
Investments, other	650,151	575,540
Deferred policy acquisition costs, net	121,365	128,463
Other assets	52,769	51,052
Right of use Assets - Financing	377,733	474,765
Right of use Assets - Operating	65,316	58,917
Related Parties Amounts Due	40,140	48,308
Subtotal assets	6,624,410	6,750,646
Property, plant and equipment, at cost:
Land	1,613,871	1,537,206
Buildings and improvements	7,649,849	7,088,810
Furniture and equipment	966,211	928,241
Property, plant and equipment (gross)	17,063,484	15,660,293
Less: Accumulated depreciation	(4,666,444)	(4,310,205)
Total property, plant and equipment	12,397,040	11,350,088
Total assets	19,021,450	18,100,734
Liabilities:
Accounts payable and accrued expenses	757,988	761,039
Notes, loans and leases payable	6,400,899	6,108,042
Operating lease liability	64,580	58,373
Policy benefits and losses, claims and loss expenses payable	865,397	880,202
Liabilities from investment contracts	2,393,590	2,398,884
Other policyholders' funds and liabilities	7,677	8,232
Deferred income	56,821	52,282
Deferred income taxes, net	1,444,120	1,329,489
Total liabilities	11,991,072	11,596,543
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Common stock, value, issued		176
Additional paid-in capital	453,643	453,643
Accumulated other comprehensive loss	(275,664)	(285,623)
Retained earnings	7,519,376	7,003,148
Total stockholders' equity	7,030,378	6,504,191
Total liabilities and stockholders' equity	19,021,450	18,100,734
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
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:
Property subject to or available for operating lease, gross	912,046	827,696
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 5,921,507	$ 5,278,340