Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
ASSETS:
Cash and cash equivalents	$ 600,646	$ 441,850
Reinsurance recoverables and trade receivables, net	175,210	189,869
Inventories, net	79,756	69,472
Prepaid expenses	134,300	126,296
Investments, fixed maturities and marketable equities	1,510,538	1,304,962
Investments, other	310,072	268,720
Deferred policy acquisition costs, net	136,386	115,422
Other assets	100,572	106,157
Related party assets	85,734	141,790
Subtotal assets	3,133,214	2,764,538
Property, plant and equipment, at cost:
Land	587,347	467,482
Buildings and improvements	2,187,400	1,728,033
Furniture and equipment	399,943	355,349
Property, plant and equipment (gross)	7,151,244	6,047,493
Less: Accumulated depreciation	(2,133,733)	(1,939,856)
Total property, plant and equipment	5,017,511	4,107,637
Total assets	8,150,725	6,872,175
Liabilities:
Accounts payable and accrued expenses	502,613	496,370
Notes, loans and leases payable	2,688,758	2,190,869
Policy benefits and losses, claims and loss expenses payable	1,071,412	1,062,188
Liabilities from investment contracts	951,490	685,745
Other policyholders' funds and liabilities	8,650	7,764
Deferred income	22,784	18,081
Deferred income taxes, net	653,612	526,799
Total liabilities	$ 5,899,319	$ 4,987,816
Commitments and contingencies (notes 9, 16, 17 and 18)
Stockholders' equity:
Additional paid-in capital	$ 451,629	$ 449,668
Accumulated other comprehensive loss	(60,525)	(34,365)
Retained earnings	2,533,641	2,142,600
Unearned employee stock ownership plan shares	(6,186)	(6,391)
Total stockholders' equity	2,251,406	1,884,359
Total liabilities and stockholders' equity	$ 8,150,725	$ 6,872,175
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
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	462,379	436,642
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 3,514,175	$ 3,059,987