Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
ASSETS:
Cash and cash equivalents	$ 697,806	$ 600,646
Reinsurance recoverables and trade receivables, net	178,081	175,135
Inventories, net	82,439	79,756
Prepaid expenses	124,728	134,300
Investments, fixed maturities and marketable equities	1,663,768	1,490,789
Investments, other	367,830	311,821
Deferred policy acquisition costs, net	130,213	136,386
Other assets	117,072	77,210
Related party assets	86,168	85,734
Subtotal assets	3,448,105	3,091,777
Property, plant and equipment, at cost:
Land	640,938	587,347
Buildings and improvements	2,606,537	2,187,400
Furniture and equipment	510,415	399,943
Property, plant and equipment (gross)	8,341,768	7,151,244
Less: Accumulated depreciation	(2,384,033)	(2,133,733)
Total property, plant and equipment	5,957,735	5,017,511
Total assets	9,405,840	8,109,288
Liabilities:
Accounts payable and accrued expenses	450,541	502,538
Notes, loans and leases payable	3,262,880	2,647,396
Policy benefits and losses, claims and loss expenses payable	1,086,322	1,071,412
Liabilities from investment contracts	1,112,498	951,490
Other policyholders' funds and liabilities	10,150	8,650
Deferred income	28,696	22,784
Deferred income taxes, net	835,009	653,612
Total liabilities	6,786,096	5,857,882
Commitments and contingencies (notes 9, 16, 17 and 18)
Stockholders' equity:
Additional paid-in capital	452,172	451,629
Accumulated other comprehensive loss	(51,236)	(60,525)
Retained earnings	2,892,893	2,533,641
Unearned employee stock ownership plan shares	(6,932)	(6,186)
Total stockholders' equity	2,619,744	2,251,406
Total liabilities and stockholders' equity	9,405,840	8,109,288
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	(525,663)	(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	492,280	462,379
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 4,091,598	$ 3,514,175