Other Expense (Income) - Schedule of Other Expense (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income Expense [Abstract]
Foreign currency exchange losses (gains), net	$ 457	$ 592	$ 293
Gain on sale of property, plant and equipment	0	(946)	0
Total other expense (income)	$ 457	$ (354)	$ 293