Impairment and Restructuring Charges (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	Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	$ 16,748	$ 0	$ 16,748	$ 0
Costs incurred to date			10,000
Expected future cash costs			15,000
Assets Held-for-sale, Current	6,646		6,646		2,450
Restructuring and repositioning expenses [Abstract]
Repositioning costs	203	0	261	0
Total restructuring and repositioning expenses	1,317	0	5,877	0
Accrued Restructuring Liability [Roll Forward]
Beginning Balance	4,344		0
Additions	1,114		5,616
Payments	(815)		(966)
Effect of exchange rate changes	98		91
Ending Balance	4,741		4,741
Europe segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges			15,756
Restructuring Expense (Income) [Member]
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	$ 1,114	$ 0	$ 5,616	$ 0