Restructuring and Related Charges (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2012
Restructuring Reserve [Roll Forward]
Balance at March 31, 2012	$ 6,299
Provision	1,182
Payments and settlements for restructuring	(6,550)
Balance at December 31, 2012	931
Severance and employment costs [Member] | Fiscal 2012 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2012	5,507
Provision	1,236
Payments and settlements for restructuring	(6,118)
Balance at December 31, 2012	625
Facilities costs [Member] | Fiscal 2012 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2012	297
Provision	(57)
Payments and settlements for restructuring	(240)
Balance at December 31, 2012	0
Facilities costs [Member] | Fiscal 2009 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2012	495
Provision	3
Payments and settlements for restructuring	(192)
Balance at December 31, 2012	$ 306