Derivative Financial Instruments (Schedule Of Effect Of Derivative Instruments On Financial Performance) (Details) (Cash flow hedging, Foreign currency, Forward contracts, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivatives Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Other Comprehensive (Loss) Income (Effective Portion)	$ (11,197)	$ 2,862
Derivatives Designated as Hedging Instruments | Operating expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive (Loss) Income (Effective Portion)	2,123	(2,929)
Derivatives Not Designated as Hedging Instruments | Other (expense) income, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Income on Derivative	$ 3,551	$ 3,138