Income Taxes - Provision (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
(Loss) Income before income taxes	$ (104,256)	$ 6,750	$ (140,283)	$ 72,076
Income tax (benefit) provision	(16,272)	4,213	(23,552)	28,512
CONSOLIDATED NET (LOSS) INCOME	$ (87,984)	$ 2,537	$ (116,731)	$ 43,564
Income tax (benefit) provision as a percentage of (loss) income before income taxes	15.60%	62.40%	16.80%	39.60%