Derivative Financial Instruments (Schedule Of Effect Of Derivative Instruments On Financial Performance) (Details) (Foreign Currency Exchange Contracts [Member], Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating Expenses [Member]
Amount of Loss Recognized in Other Comprehensive Income (effective portion)	$ 4,765	$ (11,490)	$ 4,727	$ (10,233)
Amount of Loss Reclassified from Accumulated Other Comprehensive Income (loss)	(2,530)	3,672	(4,836)	9,166
Derivatives Not Designated As Hedging Instruments [Member] | Other Expenses [Member]
Amount of Loss Recognized in Income on Derivative	$ (604)	$ (456)	$ (1,943)	$ 958