INCOME TAXES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Examination [Line Items]
Valuation allowance	$ 112,085,000	$ 109,531,000	$ 1,373,000	$ 1,263,000
Interest limitation carryforward	39,094,000	38,623,000
Net operating losses	155,922,000	147,749,000
Unrecognized tax benefits	0	0
Income tax expense (benefit) related to CARES Act	0
Federal
Income Tax Examination [Line Items]
Net operating losses		548,000,000.0
Operating loss carryforwards subject to expiration	139,800,000
Merger Operating Loss Carryforward
Income Tax Examination [Line Items]
Interest limitation carryforward	85,000,000.0
Net operating losses	400,000
Merger Operating Loss Carryforward | Federal
Income Tax Examination [Line Items]
Operating loss carryforwards	458,900,000
Net operating losses	577,900,000
Merger Operating Loss Carryforward | State
Income Tax Examination [Line Items]
Operating loss carryforwards	479,600,000
Federal Net Operating Loss Carryfowards Available To Offset Future Taxable Income | Federal
Income Tax Examination [Line Items]
Net operating losses	438,100,000
Federal Net Operating Loss Carryfowards Available To Offset Future Taxable Income | State
Income Tax Examination [Line Items]
Net operating losses	600,100,000	578,500,000
Interest Limitation Carryforwards
Income Tax Examination [Line Items]
Interest limitation carryforward	$ 154,800,000	$ 145,600,000