Derivative Instruments And Hedging Activities - Impact of Derivative Instruments Designated as Hedging Instruments on Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivatives, Net of Tax (Effective Portion)	$ 4,892	$ (6,752)	$ 9,865	$ (8,984)
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivatives, Net of Tax (Effective Portion)	4,249	(5,777)	10,745	(7,136)
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivatives, Net of Tax (Effective Portion)	$ 643	$ (975)	$ (880)	$ (1,848)