Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
ASSETS:
Cash and cash equivalents	$ 2,377,124	$ 2,060,524
Reinsurance recoverables and trade receivables, net	206,663	189,498
Inventories, net	164,884	151,474
Prepaid expenses	232,039	241,711
Investments, fixed maturities and marketable equities	2,469,512	2,770,394
Investments, other	620,140	575,540
Deferred policy acquisition costs, net	123,596	128,463
Other assets	60,821	51,052
Right of use Assets - Financing	420,496	474,765
Right of use Assets - Operating	59,496	58,917
Related party assets	43,102	48,308
Subtotal assets	6,777,873	6,750,646
Property, plant and equipment, at cost:
Land	1,555,326	1,537,206
Buildings and improvements	7,364,517	7,088,810
Furniture and equipment	942,036	928,241
Property, plant and equipment (gross)	16,322,927	15,660,293
Less: Accumulated depreciation	(4,486,766)	(4,310,205)
Total property, plant and equipment	11,836,161	11,350,088
Total assets	18,614,034	18,100,734
Liabilities:
Accounts payable and accrued expenses	778,605	761,039
Notes, loans and leases payable	6,287,231	6,108,042
Financing lease liability	189,037
Operating lease liability	58,808	58,373
Policy benefits and losses, claims and loss expenses payable	878,436	880,202
Liabilities from investment contracts	2,384,330	2,398,884
Other policyholders' funds and liabilities	12,218	8,232
Deferred income	64,790	52,282
Deferred income taxes, net	1,371,859	1,329,489
Total liabilities	11,836,277	11,596,543
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	453,643	453,643
Accumulated other comprehensive loss	(261,836)	(285,623)
Retained earnings	7,252,927	7,003,148
Total stockholders' equity	6,777,757	6,504,191
Total liabilities and stockholders' equity	18,614,034	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
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	866,916	827,696
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 5,594,132	$ 5,278,340