INCOME TAXES - Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
US federal income tax (benefit) expense:
Current	$ 0	$ 0	$ 0
Deferred	(3,072)	(2,688)	(21,944)
Federal income tax expense (benefit)	(3,072)	(2,688)	(21,944)
State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current	2,074	1,176	1,244
Deferred	(1,276)	(1,141)	2,115
State income tax expense (benefit)	798	35	3,359
Total income tax benefit	$ (2,274)	$ (2,653)	$ (18,585)