Derivative Instruments And Hedging Activities (Fair Values Of Derivative Instruments On Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative assets	$ 4,246	$ 4,297
Derivative liabilities	(2,804)	(4,542)
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	4,002	2,690
Derivative liabilities	(2,090)	(3,777)
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	2,956	2,500
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	(1,292)	(2,007)
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	1,046	190
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	(798)	(1,770)
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	244	1,607
Derivative liabilities	(714)	(765)
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	244	1,607
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	$ (714)	$ (765)