Derivative Financial Instruments (Schedule Of Effect Of Derivative Instruments On Financial Performance) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income	$ 1,853
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss	(1,616)
Derivatives Designated as Hedging Instruments \| Cash flow hedging \| Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income		$ (3,143)
Amount of Gain (Loss) Recognized in Other Comprehensive Income	1,853
Derivatives Designated as Hedging Instruments \| Cash flow hedging \| Foreign currency \| Operating expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss		(699)
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss	(1,616)
Derivatives Not Designated as Hedging Instruments \| Cash flow hedging \| Foreign currency \| Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Income on Derivative	$ (1,135)	$ 7,062

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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