Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Mar. 31, 2025
ASSETS:
Cash and cash equivalents	$ 1,032,257	$ 988,828
Reinsurance recoverables and trade receivables, net	172,649	230,716
Inventories, net	175,023	163,132
Prepaid Expense	353,201	282,406
Fixed maturities - available for sale	2,501,436	2,479,498
Equity securities, at estimated fair value	57,418	65,549
Investments, other	720,713	678,254
Deferred policy acquisition costs, net	116,178	121,729
Other assets	129,516	126,732
Right of use Assets - Financing	30,561	138,698
Right of use Assets - Operating	40,689	46,025
Related party assets (liabilities)	60,630	45,003
Property, plant and equipment, at cost:
Land	1,854,024	1,812,820
Buildings and improvements	10,329,648	9,628,271
Furniture and equipment	1,068,623	1,047,414
Property, plant and equipment (gross)	22,844,026	21,004,679
Less: Accumulated depreciation	(6,616,653)	(5,892,079)
Total property, plant and equipment	16,227,373	15,112,600
Total assets	21,617,644	20,479,170
Liabilities:
Accounts payable and accrued expenses	765,426	820,900
Notes, loans and leases payable	8,017,296	7,193,857
Operating lease liability	41,464	46,973
Policy benefits and losses, claims and loss expenses payable	930,764	857,521
Liabilities from investment contracts	2,453,325	2,511,422
Other policyholders' funds and liabilities	5,786	7,539
Deferred income	54,227	52,895
Deferred Income Tax Liabilities, Net	1,605,547	1,489,920
Total liabilities	13,873,835	12,981,027
Commitments and contingencies (notes 4 and 9)
Stockholders' equity:
Additional paid-in capital	462,548	462,548
Accumulated other comprehensive loss	168,090	229,314
Retained earnings	8,116,328	7,931,886
Total stockholders' equity	7,743,809	7,498,143
Total liabilities and stockholders' equity	21,617,644	20,479,170
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	1,175,723	1,046,135
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 8,416,008	$ 7,470,039