Hedging Instruments (Gain (Loss) Recognized In Other Comprehensive Income On Derivative Instruments (Effective Portion)) (Details) - Cash Flow Hedges [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments (Effective Portion), Net of Tax	$ (10,135)	$ 2,699	$ (5,143)
Foreign Currency Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments (Effective Portion), Net of Tax	$ (10,135)	2,457	(5,604)
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments (Effective Portion), Net of Tax		$ 242	$ 461