Summary of Significant Accounting Policies - Schedule of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 284,545	$ 262,161	$ 252,432
Other comprehensive (loss) income, net of tax	(5,080)	1,720	(7,147)
Ending Balance	183,091	284,545	262,161
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(19,229)	(20,949)	(13,802)
Other comprehensive (loss) income, net of tax	(5,080)	1,720
Ending Balance	$ (24,309)	$ (19,229)	$ (20,949)