Derivative Instruments (Summary Of Fair Value Of Foreign Currency Contracts) (Details) (Foreign Currency Contracts [Member], USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
Prepaid Expenses and Other Current Assets [Member]
Derivative assets fair value designated as hedging instruments	$ 998	[1]	$ 1,123	[1]
Derivative assets fair value not designated as hedging instruments	197	[1]		[1]
Other Accrued Expenses [Member]
Derivative liabilities fair value designated as hedging instruments	(364)	[1]	424	[1]
Derivative liabilities fair value not designated as hedging instruments	$ (296)	[1]	$ 956	[1]

[1] See Note 16 - Fair Value Measurements for details.