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LONG-TERM DEBT - Asset-Based Loan Facility (Details)
12 Months Ended
Mar. 17, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]      
Amount outstanding   $ 330,000,000  
Consolidated fixed charge coverage ratio   3.45  
ABL Revolver      
Debt Instrument [Line Items]      
Interest rate   1.90% 3.50%
Revolving Credit Facility | ABL Revolver      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 135,000,000   $ 85,000,000.0
Maximum increase in maximum borrowing capacity 50,000,000.0    
Available borrowing capacity, including impact of letters of credit   $ 131,900,000 $ 81,600,000
Amount outstanding   $ 0  
Increment amount to increase maximum under the credit facility $ 10,000,000.0    
Unused facility fee percentage   0.375%  
Interest rate   1.90%  
Revolving Credit Facility | ABL Revolver | Minimum      
Debt Instrument [Line Items]      
Unused facility fee percentage 0.25%    
Revolving Credit Facility | ABL Revolver | Maximum      
Debt Instrument [Line Items]      
Unused facility fee percentage 0.375%    
Revolving Credit Facility | ABL Revolver | LIBOR or CDOR | Minimum      
Debt Instrument [Line Items]      
Margin rate 1.25%    
Revolving Credit Facility | ABL Revolver | LIBOR or CDOR | Maximum      
Debt Instrument [Line Items]      
Margin rate 1.75%    
Revolving Credit Facility | ABL Revolver | Canadian Prime Rate or Canadian Base Rate | Minimum      
Debt Instrument [Line Items]      
Margin rate 0.25%    
Revolving Credit Facility | ABL Revolver | Canadian Prime Rate or Canadian Base Rate | Maximum      
Debt Instrument [Line Items]      
Margin rate 0.75%