Related Party Costs and Expenses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Related party cost and expense:
Related party expenses, total	$ 11,760	$ 10,372	$ 41,685	$ 36,584
SAC Holdings
Related party cost and expense:
U-Haul lease expenses	655	655	1,965	1,971
U-Haul commission expenses	10,414	9,142	37,341	32,531
Private Mini
Related party cost and expense:
U-Haul commission expenses	$ 691	$ 575	$ 2,379	$ 2,082