Income Taxes - Schedule of Domestic and Foreign Components of (Loss) Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
(Loss) income before taxes	$ (251,885)	$ (42,268)	$ 19,369
Domestic
Income Tax [Line Items]
(Loss) income before taxes	(172,560)	(36,454)	16,284
Foreign
Income Tax [Line Items]
(Loss) income before taxes	$ (79,325)	$ (5,814)	$ 3,085