Restructuring And Impairment Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2012		Dec. 31, 2011
Restructuring Charges [Abstract]
Employee termination benefits					$ 3,687		$ 7,123
Other restructuring costs					0		3,097
Restructuring costs	$ 0	[1]	$ 399	[1]	$ 3,687	[1]	$ 10,220	[1]

[1] Item is not included in segment operating income, but is included in consolidated operating income.