LONG-TERM DEBT (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Borrowings [Abstract]
Less: current portion	$ (2,500)	$ (2,500)
Long-term debt less current maturities	209,813	235,419
Unamortized debt issuance costs	5,200	6,500
Carrying Value
Borrowings [Abstract]
Total long-term debt	217,500	244,375
Less: current portion	(2,500)	(2,500)
Long-term debt less current maturities	215,000	241,875
Fair Value | Level 2 Inputs
Borrowings [Abstract]
Total long-term debt	212,606	244,375
Less: current portion	(2,444)	(2,500)
Long-term debt less current maturities	210,162	241,875
ABL Revolver | Carrying Value
Borrowings [Abstract]
Total long-term debt	0	0
ABL Revolver | Fair Value | Level 2 Inputs
Borrowings [Abstract]
Total long-term debt	0	0
Term Loan B | Carrying Value
Borrowings [Abstract]
Total long-term debt	217,500	244,375
Term Loan B | Fair Value | Level 2 Inputs
Borrowings [Abstract]
Total long-term debt	$ 212,606	$ 244,375