Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Foreign exchange transaction (gains) losses	$ (162)	$ 1,356	$ 377
Other	(28)	(534)	(6)
Total other (income) expense, net	$ (190)	$ 822	$ 371