Derivative Instruments And Hedging Activities (Fair Values Of Derivative Instruments On Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Derivative assets	$ 4,297	$ 2,325
Derivative liabilities	(4,542)	(3,733)
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,690	1,594
Derivative liabilities	(3,777)	(2,677)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Short-Term Forwards [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,500	1,104
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Short-Term Forwards [Member] | Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(2,007)	(2,677)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Long-Term Forwards [Member] | Other Long-Term Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	190	490
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Long-Term Forwards [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(1,770)	0
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1,607	731
Derivative liabilities	(765)	(1,056)
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Short-Term Forwards [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1,607	731
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Short-Term Forwards [Member] | Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ (765)	$ (1,056)