Derivative Financial Instruments - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	$ 217	$ 105	$ 484	$ (39)
Foreign exchange derivative | Net sales | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	152	(194)	115	(253)
Foreign exchange derivative | Cost of goods sold | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	(52)	268	88	182
Foreign exchange derivative | Selling, general and administrative expenses | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	3	21	(2)	31
Foreign exchange derivative | Other income and expenses | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	0	(2)	(1)	(11)
Interest rate swap | Interest expense | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	$ 114	$ 12	$ 284	$ 12