Income Taxes - Schedule of Components of Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Domestic	$ 52,986	$ 18,016	$ (12,294)
Foreign jurisdictions	3,959	3,941	4,464
Income (loss) before income taxes	$ 56,945	$ 21,957	$ (7,830)