Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
U.S.	$ 6,701	$ 8,491	$ 6,501
Non-U.S.	10,568	5,028	3,863
Total current	17,269	13,519	10,364
Deferred:
U.S.		(3)	1
Non-U.S.	348	(351)	16
Total deferred	348	(354)	17
Total income taxes provision	$ 17,617	$ 13,165	$ 10,381