Derivative Instruments (Summary Of Fair Value Of Foreign Currency Contracts) (Details) (Foreign Currency Contracts [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets fair value designated as hedging instruments	$ 914	[1]	$ 351	[1]
Derivative assets fair value not designated as hedging instruments	478	[1]	2,512	[1]
Other Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities fair value designated as hedging instruments	168	[1]	237	[1]
Derivative liabilities fair value not designated as hedging instruments	$ 68	[1]	$ 63	[1]

[1] Please refer to Note 16 - Fair Value Measurements for additional details.