Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
ASSETS:
Cash and cash equivalents	$ 984,185	$ 600,646
Reinsurance recoverables and trade receivables, net	199,095	175,210
Inventories, net	79,682	79,756
Prepaid expenses	54,486	134,300
Investments, fixed maturities and marketable equities	1,700,581	1,510,538
Investments, other	376,813	310,072
Deferred policy acquisition costs, net	118,040	136,386
Other assets	78,049	77,210
Related party assets	91,705	85,734
Subtotal assets	3,682,636	3,109,852
Property, plant and equipment, at cost:
Land	633,725	587,347
Buildings and improvements	2,509,073	2,187,400
Furniture and equipment	477,131	399,943
Property, plant and equipment, gross	7,919,530	7,151,244
Less: Accumulated depreciation	(2,314,849)	(2,133,733)
Total property, plant and equipment	5,604,681	5,017,511
Total assets	9,287,317	8,127,363
Liabilities:
Accounts payable and accrued expenses	435,000	502,613
Notes, loans and leases payable	3,198,435	2,665,396
Policy benefits and losses, claims and loss expenses payable	1,083,627	1,071,412
Liabilities from investment contracts	1,085,775	951,490
Other policyholders' funds and liabilities	8,268	8,650
Deferred income	23,847	22,784
Deferred income taxes, net	791,661	653,612
Total liabilities	6,626,613	5,875,957
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	452,014	451,629
Accumulated other comprehensive loss	(21,034)	(60,525)
Retained earnings	2,902,932	2,533,641
Unearned employee stock ownership plan shares	(6,055)	(6,186)
Total stockholders' equity	2,660,704	2,251,406
Total liabilities and stockholders' equity	9,287,317	8,127,363
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	493,214	462,379
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 3,806,387	$ 3,514,175