Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
ASSETS:
Cash and cash equivalents	$ 803,522	$ 697,806
Reinsurance recoverables and trade receivables, net	187,037	178,081
Inventories, net	93,374	82,439
Prepaid expenses	80,118	124,728
Investments, fixed maturities and marketable equities	1,763,031	1,663,768
Investments, other	376,224	367,830
Deferred policy acquisition costs, net	128,878	130,213
Other assets	99,550	97,525
Related party assets	80,865	86,168
Subtotal assets	3,612,599	3,428,558
Property, plant and equipment, at cost:
Land	661,622	648,757
Buildings and improvements	2,710,924	2,618,265
Furniture and equipment	529,374	510,415
Property, plant and equipment (gross)	8,646,431	8,361,315
Less: Accumulated depreciation	(2,457,890)	(2,384,033)
Total property, plant and equipment	6,188,541	5,977,282
Total assets	9,801,140	9,405,840
Liabilities:
Accounts payable and accrued expenses	432,122	450,541
Notes, loans and leases payable	3,386,851	3,262,880
Policy benefits and losses, claims and loss expenses payable	1,091,550	1,086,322
Liabilities from investment contracts	1,221,381	1,112,498
Other policyholders' funds and liabilities	14,232	10,150
Deferred income	37,135	28,696
Deferred income taxes, net	854,805	835,009
Total liabilities	7,038,076	6,786,096
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	452,319	452,172
Accumulated other comprehensive loss	(35,098)	(51,236)
Retained earnings	3,019,100	2,892,893
Unearned employee stock ownership plan shares	(6,104)	(6,932)
Total stockholders' equity	2,763,064	2,619,744
Total liabilities and stockholders' equity	9,801,140	9,405,840
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Serial 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	515,733	492,280
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 4,228,778	$ 4,091,598