Certain Financial Statement Information (Details 15) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Schedule of Other Income, Net
Net gain (loss) on disposals of property, equipment and other assets	$ 1,299	$ 0	$ 1,289	$ (10)
Other, net	67	86	250	219
Other income (expense), net	$ 1,366	$ 86	$ 1,539	$ 209