Related Party Costs and Expenses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Related party costs and expenses:
Related party expenses, total	$ 12,290	$ 11,269
SAC Holdings
Related party costs and expenses:
U-Haul lease expenses	661	623
U-Haul commission expenses	10,934	10,003
Private Mini
Related party costs and expenses:
U-Haul commission expenses	$ 695	$ 643