INCOME TAXES - Temporary Differences That Give Rise to Deferred Tax (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Reserves not currently deductible	$ 6,634	$ 10,707
Net operating loss carryforwards	128,819	110,773
Goodwill and intangibles (tax deductible)	7,853	12,757
Accrued expenses	641	95
Property basis differences	3,679	2,813
Stock based compensation	2,180	2,371
Total deferred tax assets	149,806	139,516
Deferred tax liabilities:
Other	(309)	(180)
Less: valuation allowance	(148,465)	(138,238)
Net deferred tax asset	$ 1,032	$ 1,098