Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
ASSETS:
Cash and cash equivalents	$ 3,065,115	$ 2,704,137
Reinsurance recoverables and trade receivables, net	203,202	229,343
Inventories, net	166,136	158,888
Prepaid expenses	236,035	236,915
Investments, fixed maturities and marketable equities	2,615,758	2,893,399
Investments, other	548,198	543,755
Deferred policy acquisition costs, net	146,778	103,828
Other assets	47,900	60,409
Right of use Assets - Financing	529,000	620,824
Right of use Assets - Operating	68,208	74,382
Related party assets	48,337	47,851
Subtotal assets	7,674,667	7,673,731
Property, plant and equipment, at cost:
Land	1,427,781	1,283,142
Buildings and improvements	6,390,317	5,974,639
Furniture and equipment	876,515	846,132
Property, plant and equipment (gross)	14,509,801	13,358,406
Less: Accumulated depreciation	(4,041,125)	(3,732,556)
Total property, plant and equipment	10,468,676	9,625,850
Total assets	18,143,343	17,299,581
Liabilities:
Accounts payable and accrued expenses	706,402	677,785
Notes, loans and leases payable	6,298,831	6,022,497
Operating lease liability	67,858	74,197
Policy benefits and losses, claims and loss expenses payable	990,233	978,254
Liabilities from investment contracts	2,390,028	2,336,238
Other policyholders' funds and liabilities	12,126	10,812
Deferred income	56,871	49,157
Deferred income taxes, net	1,307,807	1,265,358
Total liabilities	11,830,156	11,414,298
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	453,819	453,819
Accumulated other comprehensive loss	(192,121)	46,384
Retained earnings	6,718,642	6,052,233
Total stockholders' equity	6,313,187	5,885,283
Total liabilities and stockholders' equity	18,143,343	17,299,581
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	727,953	615,679
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 5,087,235	$ 4,638,814