Derivative Instruments And Hedging Activities - Loss Reclassified From Accumulated OCI Into Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from Accumulated OCI into Earnings (Effective Portion)	$ (3,383)	$ (3,157)	$ (10,822)	$ (9,651)
Foreign Exchange Contracts [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from Accumulated OCI into Earnings (Effective Portion)	(3,288)	(2,663)	(10,280)	(8,033)
Interest Rate Swaps [Member] | Net Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from Accumulated OCI into Earnings (Effective Portion)	$ (95)	$ (494)	$ (542)	$ (1,618)