Income Taxes - Provision (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
(Loss) Income before income taxes	$ (36,027)	$ 65,326
Income tax (benefit) provision	(7,280)	24,299
CONSOLIDATED NET (LOSS) INCOME	$ (28,747)	$ 41,027
Income tax (benefit) provision as a percentage of (loss) income before income taxes	20.20%	37.20%