Restructuring and Asset Impairment Charges Restructuring and Asset Impairment Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Restructuring Reserve [Roll Forward]
Beginning balance	$ 101	$ 1,144	$ 397	$ 668	$ 1,048
Severance charges	0	580	0	1,212
Total period charges	0	580	0	1,212
Payments through September 30	(101)	(676)	(397)	(832)
Ending balance	0	1,048	0	1,048	1,048
Asset impairment and other non-cash charges	500	0	500	1,564
Total restructuring and asset impairment charges for the period	$ 500	$ 580	$ 500	$ 2,776