LONG-TERM DEBT - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Total debt	$ 234,457	$ 227,457
Less: unamortized debt issuance costs	(5,280)	(6,050)
Total debt, net of unamortized debt issuance costs	$ 229,177	$ 221,407
First Lien Term Loan Facility [Member]
Long-term debt, Interest Rate	4.00%	5.50%
Long-term debt, Maturities	2026
Total debt	$ 202,457	$ 202,457
Second Lien Term Loan Facility [Member]
Long-term debt, Interest Rate	7.70%	9.30%
Long-term debt, Maturities	2027
Total debt	$ 25,000	$ 25,000
First Lien Revolving Facility [Member]
Long-term debt, Interest Rate	3.90%
Long-term debt, Maturities	2024
Total debt	$ 7,000