Derivatives and Hedging - Location of Gains in Consolidated Condensed Statements of Operations that were Recognized and Derivative Contract Type (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]
Forward points expensed on derivatives	$ 92		$ 247
Other (expense) income, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Net Gain (Loss) Recognized in Income on Derivative Instruments	(1,128)	$ (3,546)	(6,303)	$ (9,858)
Foreign Exchange Forward | Cost Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI into COGS	$ 414	$ 272	$ 1,316