Income Taxes - Provision (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
(Loss) Income before income taxes	$ (88,539)	$ (1,937)	$ (228,822)	$ 70,139
Income tax (benefit) provision	(18,399)	960	(41,951)	29,472
CONSOLIDATED NET (LOSS) INCOME	$ (70,140)	$ (2,897)	$ (186,871)	$ 40,667
Income tax (benefit) provision as a percentage of (loss) income before income taxes	20.80%	(49.60%)	18.30%	42.00%