Derivative Financial Instruments Derivative Instruments and Hedging Activities - Cash Flow Hedge Activity Included in Accumulated Other Comprehensive Income (Loss) (Details) - Cost of Sales [Member] - Foreign Exchange Forward [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion	$ 1,262	$ 675	$ (1,930)	$ 1,685
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion		$ 190	$ 473	$ 345
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	$ (219)