Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
ASSETS:
Cash and cash equivalents	$ 984,385	$ 759,388
Reinsurance recoverables and trade receivables, net	191,764	193,538
Inventories, net	96,187	89,877
Prepaid expenses	177,918	166,129
Investments, fixed maturities and marketable equities	2,127,342	1,919,860
Investments, other	332,532	399,064
Deferred policy acquisition costs, net	140,673	124,767
Other assets	83,839	244,782
Related party assets	38,156	33,276
Subtotal assets	4,172,796	3,930,681
Property, plant and equipment, at cost:
Land	910,919	827,649
Buildings and improvements	3,762,491	3,140,713
Furniture and equipment	674,535	632,803
Property, plant and equipment, gross	10,452,724	9,537,883
Less: Accumulated depreciation	(2,979,760)	(2,721,142)
Total property, plant and equipment	7,472,964	6,816,741
Total assets	11,645,760	10,747,422
Liabilities:
Accounts payable and accrued expenses	517,360	511,115
Notes, loans and leases payable	3,975,764	3,513,076
Policy benefits and losses, claims and loss expenses payable	1,087,742	1,248,033
Liabilities from investment contracts	1,583,885	1,364,066
Other policyholders' funds and liabilities	12,907	10,040
Deferred income	29,226	34,276
Deferred income taxes, net	746,836	658,108
Total liabilities	7,953,720	7,338,714
Commitments and contingencies (notes 4, 9 and 10)
Stockholders' equity:
Additional paid-in capital	453,116	452,746
Accumulated other comprehensive loss	(74,707)	(4,623)
Retained earnings	3,985,927	3,635,561
Unearned employee stock ownership plan shares	(5,143)	(7,823)
Total stockholders' equity	3,692,040	3,408,708
Total liabilities and stockholders' equity	11,645,760	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
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	572,645	545,968
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	$ 4,532,134	$ 4,390,750