Derivative Instruments And Hedging Activities - Impact Of Derivative Instruments Designated As Hedging Instruments on Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments, Net of Tax (Effective Portion)	$ 2,843	$ 4,499
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments, Net of Tax (Effective Portion)	2,530	5,822
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative Instruments, Net of Tax (Effective Portion)	$ 313	$ (1,323)