Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 534	$ 584	$ 6,049
Restructuring Charges	(996)	(1,289)	(1,087)
Payments for restructuring, severance and other charges	(1,080)	(1,339)	(6,552)
Ending Balance	450	534	584
Restructuring Plan Fiscal Two Zero One Four [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	(628)
Payments for restructuring, severance and other charges	(178)
Ending Balance	450
Fiscal 2012 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	534	348
Restructuring Charges	(368)	(1,257)	(1,146)
Payments for restructuring, severance and other charges	(902)	(723)	(6,055)
Ending Balance	0	534	348
Fiscal 2012 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		0
Restructuring Charges		32	57
Payments for restructuring, severance and other charges		(268)	(240)
Ending Balance			0
Fiscal 2009 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring Charges			0
Payments for restructuring, severance and other charges			0
Ending Balance			0
Fiscal 2009 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		236	495
Restructuring Charges		0	2
Payments for restructuring, severance and other charges		(348)	(257)
Ending Balance		$ 0	$ 236