Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
ASSETS:
Cash and cash equivalents	$ 495,112	$ 463,744
Reinsurance recoverables and trade receivables, net	199,322	261,789
Inventories, net	67,020	56,396
Prepaid expenses	55,269	57,451
Investments, fixed maturities and marketable equities	1,138,275	1,095,338
Investments, other	248,850	241,765
Deferred policy acquisition costs, net	118,707	93,043
Other assets	97,588	99,986
Related party assets	169,624	182,035
Subtotal assets	2,589,767	2,551,547
Property, plant and equipment, at cost:
Land	405,177	333,228
Buildings and improvements	1,430,330	1,197,875
Furniture and equipment	322,088	311,142
Property, plant and equipment (gross)	5,141,717	4,314,409
Less: Accumulated depreciation	(1,732,506)	(1,559,355)
Total property, plant and equipment	3,409,211	2,755,054
Total assets	5,998,978	5,306,601
Liabilities:
Accounts payable and accrued expenses	357,954	358,491
Notes, loans and leases payable	1,942,359	1,661,845
Policy benefits and losses, claims and loss expenses payable	1,082,598	1,115,048
Liabilities from investment contracts	616,725	510,789
Other policyholders' funds and liabilities	7,988	7,294
Deferred income	31,390	30,217
Deferred income taxes	432,596	393,658
Total liabilities	4,471,610	4,077,342
Commitments and contingencies (notes 9, 17, 18, 19 and 20)
Stockholders' equity:
Additional paid-in capital	444,210	438,168
Accumulated other comprehensive loss	(53,923)	(22,680)
Retained earnings	1,805,453	1,482,630
Unearned employee stock ownership plan shares	(1,219)	(1,706)
Total stockholders' equity	1,527,368	1,229,259
Total liabilities and stockholders' equity	5,998,978	5,306,601
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued
Uhaul 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	373,325	317,476
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 2,610,797	$ 2,154,688