Restructuring Charges (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 584,000	$ 6,049,000	$ 733,000
Restructuring Charges	(1,289,000)	(1,087,000)	(10,857,000)
Payments for restructuring, severance and other charges	(1,339,000)	(6,552,000)	(5,541,000)
Ending Balance	534,000	584,000	6,049,000
Restructuring Plan Fiscal Two Zero One Four [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	(1,257,000)
Payments for restructuring, severance and other charges	(723,000)
Ending Balance	534,000
Fiscal 2012 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	348,000	5,257,000
Restructuring Charges	0	(1,146,000)	(7,091,000)
Payments for restructuring, severance and other charges	(348,000)	(6,055,000)	(1,834,000)
Ending Balance	0	348,000	5,257,000
Fiscal 2012 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		297,000
Restructuring Charges		(57,000)	(3,223,000)
Payments for restructuring, severance and other charges		(240,000)	(2,926,000)
Ending Balance		0	297,000
Fiscal 2009 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			289,000
Restructuring Charges			(308,000)
Payments for restructuring, severance and other charges			(597,000)
Ending Balance			0
Fiscal 2009 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	236,000	495,000	444,000
Restructuring Charges	(32,000)	(2,000)	(235,000)
Payments for restructuring, severance and other charges	(268,000)	(257,000)	(184,000)
Ending Balance	$ 0	$ 236,000	$ 495,000