Restructuring And Other Special Charges (Schedule of Restructuring Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011
Restructuring Reserve [Roll Forward]
Balance at March 31, 2011	$ 0
Restructuring charges	14,078
Cash payments and other adjustments	(141)
Balance at December 31, 2011	13,937
Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2011	0
Restructuring charges	13,330
Cash payments and other adjustments	(4)
Balance at December 31, 2011	13,326
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2011	0
Restructuring charges	748
Cash payments and other adjustments	(137)
Balance at December 31, 2011	$ 611