Restructuring Costs (Cumulative Restructuring Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 6,746	$ 4,113	$ 11,661
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	3,743	4,113	8,564
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs	$ 3,003	$ 0	$ 3,097

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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