Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
ASSETS:
Cash and cash equivalents	$ 849,146	$ 495,112
Reinsurance recoverables and trade receivables, net	186,145	199,322
Inventories, net	69,240	67,020
Prepaid expenses	41,176	55,269
Investments, fixed maturities and marketable equities	1,260,131	1,138,275
Investments, other	261,814	248,850
Deferred policy acquisition costs, net	113,943	118,707
Other assets	115,307	97,588
Related party assets	166,999	169,624
Subtotal assets	3,063,901	2,589,767
Property, plant and equipment, at cost:
Land	446,347	405,177
Buildings and improvements	1,568,504	1,430,330
Furniture and equipment	332,859	322,088
Property, plant and equipment (gross)	5,639,362	5,141,717
Less: Accumulated depreciation	(1,833,472)	(1,732,506)
Total property, plant and equipment	3,805,890	3,409,211
Total assets	6,869,791	5,998,978
Liabilities:
Accounts payable and accrued expenses	387,844	357,954
Notes, loans and leases payable	2,382,323	1,942,359
Policy benefits and losses, claims and loss expenses payable	1,078,379	1,082,598
Liabilities from investment contracts	664,221	616,725
Other policyholders' funds and liabilities	9,343	7,988
Deferred income	33,332	31,390
Deferred income taxes	472,096	432,596
Total liabilities	5,027,538	4,471,610
Commitments and contingencies (notes 4, 8, 9 and 10)
Stockholders' equity:
Additional paid-in capital	447,485	444,210
Accumulated other comprehensive loss	(23,201)	(53,923)
Retained earnings	2,086,174	1,805,453
Unearned employee stock ownership plan shares	(1,052)	(1,219)
Total stockholders' equity	1,842,253	1,527,368
Total liabilities and stockholders' equity	6,869,791	5,998,978
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	418,590	373,325
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 2,873,062	$ 2,610,797