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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			70 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	May 18, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 4,509	$ 9,036	$ 10,169
Compensation costs not yet recognized	$ 10,900			$ 10,900
Compensation costs not yet recognized, period for recognition	1 year 9 months 18 days
Intrinsic value of options exercised	$ 500	$ 500	$ 1,500
Omnibus Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)					3,150,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	1,010,802	853,994	593,705
Grant date fair value	$ 12,600	$ 13,000	$ 14,600
Vested in period, fair value	$ 3,700	$ 7,400	$ 15,000
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Options granted (in shares)				0
Expiration period	10 years

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