Financial Instruments (Effect On Derivative Instruments On Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Earnings	$ 24,302	$ 23,659
Foreign Currency Gains (Losses), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Earnings	9,166	6,335
Foreign currency forward contracts [Member] | Foreign Currency Gains (Losses), Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Earnings	$ (2,462)	$ (12)	$ (2,938)