Income Taxes - Schedule of Income before Income Tax, Domestic and Foreign (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic	$ 46,528	$ 25,280	$ 16,395
Foreign	(10,912)	(20,768)	(3,419)
Income before provision for income taxes	$ 35,616	$ 4,512	$ 12,976