Financial Instruments, Derivative Instruments And Hedging (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) Recognized in Income on Derivative	$ 1,350		$ 1,350
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (loss) Recognized in OCI on Derivatives (Effective Portion)	1,392	(3,968)	(285)	(15,541)
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member] | Interest Income [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing				(1)
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member] | Revenue [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(1,879)	(4,332)	(5,156)	(6,181)
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing	(27)	(61)	180	1,074
Cash Flow Derivatives Not Designated As Hedging Instruments [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) Recognized in Income on Derivative	1,099		1,332
Gain (Loss) Recognized on Derivative, Discontinued Operations	251		18
Cash Flow Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] | Revenue [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) Recognized in Income on Derivative	(251)	1,255	(18)	(1,195)
Cash Flow Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] | Other Income [Member]
Summary of Gains (Losses) Recognized in Operations and Accumulated Other Comprehensive Income (Loss) for Derivatives
Gain (Loss) Recognized in Income on Derivative	$ 1,350		$ 1,350