Derivative Instruments and Hedging Activities (Effect on Consolidated Statements of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Derivatives designated as hedging instruments | Foreign currency contracts | Other comprehensive income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (effective portion), net of taxes	$ (1,212)	$ (375)	$ 143
Derivatives designated as hedging instruments | Foreign currency contracts | Selling, general & administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified from AOCI into results of operations (effective portion), net of taxes	1,125	357	154
Derivatives not designated as hedging instruments | Interest-rate swaps | Interest expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in results of operations	$ 832	$ (606)	$ 530