Derivative Financial Instruments (Schedule Of The Fair Values Of Derivative Instruments) (Details) - Cash flow hedging - Foreign currency - Forward contracts - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivatives Designated as Hedging Instruments | Prepaid expenses and other current assets
Asset Derivatives
Derivative assets fair value	$ 436	$ 435
Derivatives Designated as Hedging Instruments | Accrued expenses and other current liabilities
Liability Derivatives
Derivative liabilities fair value	2,895	9,364
Derivatives Not Designated as Hedging Instruments | Prepaid expenses and other current assets
Asset Derivatives
Derivative assets fair value	627	771
Derivatives Not Designated as Hedging Instruments | Accrued expenses and other current liabilities
Liability Derivatives
Derivative liabilities fair value	$ 783	$ 328