Restructuring Charges Restructuring Charges (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Reserve [Roll Forward]
Liability, beginning balance	$ 307	$ 548		$ 548
Restructuring charges	999	93	0	1,092	0
Non-cash items	(272)
Cash payments	(847)	(334)
Liability, ending balance	187	307		187
Workforce Reduction
Restructuring Reserve [Roll Forward]
Liability, beginning balance	307	548		548
Restructuring charges	727	93
Non-cash items	0
Cash payments	(847)	(334)
Liability, ending balance	187	307		187
Asset Impairment
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0		0
Restructuring charges	272	0
Non-cash items	(272)
Cash payments	0	0
Liability, ending balance	$ 0	$ 0		$ 0