Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
ASSETS:
Cash and cash equivalents	$ 650,339	$ 759,388
Reinsurance recoverables and trade receivables, net	207,987	193,538
Inventories, net	94,901	89,877
Prepaid expenses	183,536	166,129
Investments, fixed maturities and marketable equities	1,950,876	1,919,860
Investments, other	396,622	399,064
Deferred policy acquisition costs, net	134,133	124,767
Other assets	248,320	244,782
Related party assets	30,486	33,276
Subtotal assets	3,897,200	3,930,681
Property, plant and equipment, at cost:
Land	849,042	827,649
Buildings and improvements	3,331,918	3,140,713
Furniture and equipment	641,730	632,803
Property, plant and equipment (gross)	9,903,739	9,537,883
Less: Accumulated depreciation	(2,799,455)	(2,721,142)
Total property, plant and equipment	7,104,284	6,816,741
Total assets	11,001,484	10,747,422
Liabilities:
Accounts payable and accrued expenses	518,033	511,115
Notes, loans and leases payable	3,586,127	3,513,076
Policy benefits and losses, claims and loss expenses payable	1,252,810	1,248,033
Liabilities from investment contracts	1,409,705	1,364,066
Other policyholders' funds and liabilities	9,857	10,040
Deferred income	41,963	34,276
Deferred income taxes, net	686,844	658,108
Total liabilities	7,505,339	7,338,714
Commitments and contingencies (notes 4, 8 and 9)
Stockholders' equity:
Additional paid-in capital	452,862	452,746
Accumulated other comprehensive loss	(45,966)	(4,623)
Retained earnings	3,763,339	3,635,561
Unearned employee stock ownership plan shares	(6,937)	(7,823)
Total stockholders' equity	3,496,145	3,408,708
Total liabilities and stockholders' equity	11,001,484	10,747,422
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	547,291	545,968
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 4,533,758	$ 4,390,750