INCOME TAXES - Reconciliation of the Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Tax benefit at statutory rate	$ (4,307)	$ (3,730)	$ (20,543)	$ (10,002)
State tax expense, net of federal taxes	378	131	528	134
Alternative minimum tax receivable	(925)	0	(925)	0
Valuation allowance changes affecting income tax provision	4,876	4,967	22,194	10,282
Non-deductible transaction costs and other	38	(947)	143	179
Total income tax expense	$ 60	$ 421	$ 1,397	$ 593