FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Actual and estimated fair values of the financial instruments
Derivative liability	$ 10,810	$ 6,940
Level 2 | Carrying Amount | Interest rate swaps
Actual and estimated fair values of the financial instruments
Derivative liability	10,810	6,940
Level 2 | Carrying Amount | FILO Asset-based Term Loan Facility | FILO Term Loan
Actual and estimated fair values of the financial instruments
Long-term debt	273,898	266,814
Level 2 | Carrying Amount | Notes | Notes
Actual and estimated fair values of the financial instruments
Long-term debt	156,427	154,675
Level 2 | Carrying Amount | Tranche B-2 | Amended Term Loan Facility Due March 2021 | Term Loan Facility
Actual and estimated fair values of the financial instruments
Long-term debt	434,773	441,500
Level 2 | Fair Value | Interest rate swaps
Actual and estimated fair values of the financial instruments
Derivative liability	10,810	6,940
Level 2 | Fair Value | FILO Asset-based Term Loan Facility | FILO Term Loan
Actual and estimated fair values of the financial instruments
Long-term debt	231,786	265,851
Level 2 | Fair Value | Notes | Notes
Actual and estimated fair values of the financial instruments
Long-term debt	148,606	148,488
Level 2 | Fair Value | Tranche B-2 | Amended Term Loan Facility Due March 2021 | Term Loan Facility
Actual and estimated fair values of the financial instruments
Long-term debt	$ 239,125	$ 414,321