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	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating Expenses [Member]
Amount of Loss Recognized in Other Comprehensive Income (effective portion)	$ (11,259)	$ 1,743
Amount of Loss Reclassified from Accumulated Other Comprehensive Income (loss)	8,475	(1,573)
Derivatives Not Designated As Hedging Instruments [Member] | Other Expenses [Member]
Amount of Loss Recognized in Income on Derivative	$ 567	$ (1,638)