Shareholders' Equity Gains and Losses, Net of Tax Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI Into Income	$ 1,348	$ 215	$ 2,171	$ 1,574
Foreign Exchange Contract | Other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI Into Income	1,380	493	2,607	2,423
Foreign Exchange Contract | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI Into Income	$ (32)	$ (278)	$ (436)	$ (849)