Restructuring and Other Special Charges (Components of Restructuring) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 748			$ 14,078
Other related costs	1,683			1,683
Asset impairment charges	0	2,500		2,500	0
Total restructuring and other special charges	$ 2,431		$ 0	$ 18,261	$ 0