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LONG-TERM DEBT (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Sep. 30, 2017
Dec. 31, 2017
Borrowings [Abstract]      
Total long-term debt $ 241,604   $ 242,024
Less unamortized debt issuance costs (9,650)   (10,073)
Less: Current portion (3,387)   (3,381)
Long-term debt, less current maturities and unamortized debt issuance costs 238,217   238,643
Secured Leverage Ratio [Abstract]      
Write off of debt issuance costs   $ 600  
ABL Revolver [Member]      
Borrowings [Abstract]      
Total long-term debt $ 0   0
Debt instrument term 5 years    
Debt instrument face amount $ 85,000    
Maturity date Aug. 29, 2022    
Interest rate 3.20%    
Commitment fee 0.375%    
Fixed charge coverage ratio 3.44    
ABL Revolver [Member] | Minimum [Member]      
Borrowings [Abstract]      
Incremental increase in term loan $ 10,000    
Commitment fee 0.25%    
ABL Revolver [Member] | Maximum [Member]      
Borrowings [Abstract]      
Incremental increase in term loan $ 50,000    
Commitment fee 0.375%    
ABL Revolver [Member] | LIBOR [Member] | Minimum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 1.25%    
ABL Revolver [Member] | LIBOR [Member] | Maximum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 1.75%    
ABL Revolver [Member] | CDOR [Member] | Minimum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 1.25%    
ABL Revolver [Member] | CDOR [Member] | Maximum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 1.75%    
ABL Revolver [Member] | Prime Rate [Member] | Minimum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 0.25%    
ABL Revolver [Member] | Prime Rate [Member] | Maximum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 0.75%    
ABL Revolver [Member] | Base Rate [Member] | CANADA | Minimum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 0.25%    
ABL Revolver [Member] | Base Rate [Member] | CANADA | Maximum [Member]      
Borrowings [Abstract]      
Basis spread on base rate 0.75%    
Term Loan B [Member]      
Borrowings [Abstract]      
Total long-term debt $ 248,750   249,375
Debt instrument term 6 years    
Debt instrument face amount $ 250,000    
Amortization in quarterly installments 0.25%    
Maturity date Aug. 31, 2023    
Incremental increase in term loan $ 30,000    
Percentage of excess cash flow 50.00%    
Reduction in percentage of excess cash flow, condition one 25.00%    
Debt instrument leverage ratio, condition one 3.00    
Reduction in percentage of excess cash flow, condition two 0.00%    
Debt instrument leverage ratio, condition two 2.50    
Interest rate 7.40%    
Secured Leverage Ratio [Abstract]      
December 31, 2017 5.75%    
March 31, 2018 5.75%    
June 30, 2018 5.50%    
September 30, 2018 5.50%    
December 31, 2018 5.25%    
March 31, 2019 5.25%    
June 30, 2019 5.00%    
September 30, 2019 5.00%    
December 31, 2019 4.75%    
March 31, 2020 4.75%    
June 30, 2020 and each Fiscal Quarter thereafter 4.50%    
Secured Leverage Ratio 3.43%    
Term Loan B [Member] | Minimum [Member]      
Borrowings [Abstract]      
Incremental increase in term loan $ 10,000    
Term Loan B [Member] | Maximum [Member]      
Borrowings [Abstract]      
Debt instrument secured leverage ratio 3.60    
Fixed charge coverage ratio 1.00    
Secured debt covenant amount net of restricted cash $ 30,000    
Promissory Note Payable [Member]      
Borrowings [Abstract]      
Total long-term debt $ 2,504   $ 2,722
Interest rate 2.90%