Financial Instruments, Derivative Instruments And Hedging (Summary Of Gains (Losses) Recognized In Operations And Accumulated Other Comprehensive Income (Loss) For Derivatives) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative [Line Items]
Estimated amount of net amounts of existing losses expected to be reclassified into income within next 12 months	$ 5,600,000
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Gain (loss) Recognized in OCI on Derivatives (Effective Portion)	(1,677,000)	(11,572,000)
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member] | Interest Income [Member]
Derivative [Line Items]
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing		(1,000)
Derivatives In Cash Flow Hedging Relationships [Member] | Foreign Exchange Contracts [Member] | Revenue [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(3,277,000)	(1,849,000)
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing	207,000	1,135,000
Cash Flow Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] | Revenue [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ 233,000	$ (2,450,000)