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, 2012	Dec. 31, 2011
Operating Expenses [Member]
Amount of Loss Recognized in Other Comprehensive Income (effective portion)	$ 5,164	$ (11,259)
Amount of Loss Reclassified from Accumulated Other Comprehensive Income (loss)	(5,817)	8,475
Derivatives Not Designated As Hedging Instruments [Member] | Other Expenses [Member]
Amount of Loss Recognized in Income on Derivative	$ (1,341)	$ 567