Schedule I - Condensed Financial Information Of AMERCO (Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Net earnings	$ 489,001	$ 356,741	$ 342,391
Amerco [Member]
Net earnings	489,001	356,741	342,391
Other comprehensive income (loss)	(26,160)	19,558	(31,243)
Total comprehensive income	$ 462,841	$ 376,299	$ 311,148