Restructuring And Impairment Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Restructuring Charges [Abstract]
Employee termination benefits					$ 3,687		$ 6,724
Other restructuring costs					0		3,097
Restructuring costs	$ 3,687	[1]	$ 2,962	[1]	$ 3,687	[1]	$ 9,821	[1]

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