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LONG-TERM DEBT (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 03, 2020
USD ($)
Long-term debt        
Long-term debt, net   $ 68,152 $ 167,162  
At least        
Long-term debt        
Commitment fee percentage   0.175%    
Maximum        
Long-term debt        
Commitment fee percentage   0.325%    
Term Loan Facility.        
Long-term debt        
Face amount of debt       $ 200,000
Optional prepayment $ 67,000 $ 80,000    
Fourth Amended Credit Facility        
Long-term debt        
Maximum borrowing capacity       270,000
Long-term debt, net   90,000    
Unamortized debt issuance costs   1,800    
Revolving Credit Facility        
Long-term debt        
Maximum borrowing capacity   75,000   70,000
Remaining available borrowings   69,400    
Amount drawn under the facility   $ 0    
Total leverage ratio   0.7    
Fixed charge coverage ratio   5.7    
Additional borrowing capacity       75,000
Revolving Credit Facility | At least        
Long-term debt        
Fixed charge coverage ratio   1.15    
Additional borrowing capacity   $ 15,000    
Integral multiple additional borrowing capacity   $ 1,000    
Revolving Credit Facility | At least | LIBOR        
Long-term debt        
Percentage points added to the reference rate   1.00%    
Revolving Credit Facility | At least | Base Rate        
Long-term debt        
Percentage points added to the reference rate   0.00%    
Revolving Credit Facility | Maximum        
Long-term debt        
Total leverage ratio   4.50    
Revolving Credit Facility | Maximum | LIBOR        
Long-term debt        
Percentage points added to the reference rate   2.00%    
Revolving Credit Facility | Maximum | Base Rate        
Long-term debt        
Percentage points added to the reference rate   1.00%    
Term Loan Facility        
Long-term debt        
Face amount of debt       $ 200,000
Amount outstanding   $ 90,000    
Payment that are due in next twelve months   $ 20,000    
Interest rate (Percent)   1.11%    
Percentage points added to the reference rate   1.00%    
Mandatory payment $ 7,500 $ 12,500    
Term Loan Facility | Period From December 31, 2020 To September 30, 2021        
Long-term debt        
Interest rate       1.25%
Term Loan Facility | Period From December 31, 2021 And Thereafter        
Long-term debt        
Interest rate       2.50%
Term Loan Facility | Due in the next twelve months        
Long-term debt        
Mandatory principal payment due in next twelve months       $ 20,000
Standby Letter of Credit        
Long-term debt        
Amount outstanding   $ 600