Financial Instruments (Fair Value Of Derivative Instruments On Consolidated Balance Sheets) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other current assets [Member] | Cross Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 6,711	$ 9,606
Other current assets [Member] | Foreign currency forward contracts [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	1,474	626
Other Assets [Member] | Cross Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	15,400	7,498
Accrued expenses and other current liabilities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	(3,723)	(755)
Accrued expenses and other current liabilities [Member] | Foreign currency forward contracts [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	(873)	(896)
Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	$ (10,975)	$ (4,489)