Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		0 Months Ended		0 Months Ended
	Jun. 30, 2012 Foreign currency contracts [Member] Derivatives designated as hedging instruments [Member] Cash flow hedging [Member]	Jun. 30, 2012 Interest rate swaps [Member] Derivatives not designated as hedging instruments [Member] Revolving credit agreement [Member]	Jul. 27, 2009 July 2009 Interest-rate Swap [Member] Interest rate swaps [Member] Derivatives not designated as hedging instruments [Member]	Jul. 27, 2011 July 2009 Interest-rate Swap [Member] Interest rate swaps [Member] Derivatives not designated as hedging instruments [Member]	Jul. 26, 2011 July 2011 Interest-rate Swap [Member] Interest rate swaps [Member] Derivatives not designated as hedging instruments [Member]	Jul. 26, 2012 July 2012 Interest-rate Swap [Member] Interest rate swaps [Member] Derivatives not designated as hedging instruments [Member]
Derivative [Line Items]
Notional amount	$ 55,460		$ 100,000	$ 50,000	$ 75,000	$ 125,000
Remaining maturity	11 months		3 years		1 year	3 years
Fixed interest rate			2.28%		0.58%	1.25%
Amount of hedged item		$ 125,000