Financial Instruments, Derivative Instruments And Hedging (Summary Of Gains (Losses) Recognized In Operations And Accumulated Other Comprehensive Income (Loss) For Derivatives) (Detail) (Foreign Exchange Contracts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flow Derivatives Not Designated As Hedging Instruments [Member] | Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ 55	$ (254)	$ 33
Cash Flow Derivatives Not Designated As Hedging Instruments [Member] | Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	1,316
Derivatives In Cash Flow Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in OCI on Derivatives (Effective Portion)	(694)	(8,821)	(15,790)
Derivatives In Cash Flow Hedging Relationships [Member] | Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(6,502)	(17,935)	6,054
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing	242	(411)	636
Derivatives In Cash Flow Hedging Relationships [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Ineffectiveness and Amounts Excluded from Effectiveness Testing		$ (1)	$ (13)