INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax (provision) benefit	$ (5,140)	$ 40,847	$ 598	$ 71,095
Effective income tax rate (as a percent)	16.00%	36.00%
Unrecognized tax benefits including interest	$ 2,100		2,100		$ 1,500
Decrease in unrecognized tax benefit, reasonably possible within twelve months	2,100		2,100		$ 1,500
Gross deferred tax asset	$ 79,900		$ 79,900