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Credit Agreement (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 13, 2019
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
payment
Dec. 31, 2020
USD ($)
Aug. 16, 2020
Dec. 31, 2019
USD ($)
Oct. 15, 2019
Sep. 13, 2019
USD ($)
Jun. 30, 2019
Sep. 21, 2018
USD ($)
Debt Instrument [Line Items]                    
Line of credit     $ 24,500,000     $ 19,000,000        
Long-term debt     $ 192,552,000     185,571,000        
Line of Credit | Syndicated Credit Facility                    
Debt Instrument [Line Items]                    
Leverage ratio                 3.75  
Line of Credit | Amendment No. 2 To Credit Agreement and Waiver                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity $ 15,000                  
Interest rate     10.00%              
Required scheduled prepayment of outstanding loans, amount     $ 40,000         $ 50,000    
Amount outstanding, threshold for additional interest rate   $ 10,000,000 10,000,000              
Line of Credit | Amendment No. 2 To Credit Agreement and Waiver | LIBOR                    
Debt Instrument [Line Items]                    
Interest rate 4.00%                  
Line of Credit | Amendment No. 2 To Credit Agreement and Waiver | Base Rate                    
Debt Instrument [Line Items]                    
Interest rate 3.00%                  
Line of Credit | Second Amendment Fee | Minimum                    
Debt Instrument [Line Items]                    
Credit exposure percentage             0.50%      
Line of Credit | Second Amendment Fee | Maximum                    
Debt Instrument [Line Items]                    
Credit exposure percentage                 1.50%  
Line of Credit | Second Amendment Fee | Forecast                    
Debt Instrument [Line Items]                    
Credit exposure percentage         1.00%          
Line of Credit | Amendment No. 3 to Credit Agreement                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     25,000,000     15,000,000        
Maximum capital lease indebtedness     75,000,000     50,000,000        
Issuance of the preferred stock     10,000              
Debt issuance cost capitalized           $ 1,623,000        
Fees paid to lenders associated with extinguishment of debt     5,162,000              
Write off of deferred issuance cost     $ 3,441,000              
Line of Credit | Amendment No. 3 to Credit Agreement | Forecast                    
Debt Instrument [Line Items]                    
Unused capacity, commitment fee percentage       50.00%            
Commitment fee amount       $ 2,000            
Line of Credit | Amendment No. 3 to Credit Agreement | From December 31, 2020 through June 29, 2021                    
Debt Instrument [Line Items]                    
Leverage ratio     6.50              
Line of Credit | Amendment No. 3 to Credit Agreement | From June 29, 2021 through December 30, 2021                    
Debt Instrument [Line Items]                    
Leverage ratio     6.00              
Line of Credit | Amendment No. 3 to Credit Agreement | As of December 31, 2021 and thereafter                    
Debt Instrument [Line Items]                    
Leverage ratio     3.50              
Line of Credit | Amendment No. 3 to Credit Agreement | As of December 31, 2020                    
Debt Instrument [Line Items]                    
Fixed charge coverage ratio     1.00              
Line of Credit | Amendment No. 3 to Credit Agreement | As of March 31, 2021 and thereafter                    
Debt Instrument [Line Items]                    
Fixed charge coverage ratio     1.20              
Line of Credit | Third Amendment Fee                    
Debt Instrument [Line Items]                    
Credit exposure percentage     0.20%              
Notes Payable                    
Debt Instrument [Line Items]                    
Extinguishment of debt, amount   $ 40,000                
Revolving Credit Facility | Line of Credit | Syndicated Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     $ 50,000,000             $ 50,000,000
Revolving Credit Facility | Line of Credit | Amendment No. 2 To Credit Agreement and Waiver                    
Debt Instrument [Line Items]                    
Unused capacity, commitment fee percentage 0.35%                  
Term Loan | Line of Credit | Syndicated Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity                   205,000,000
Term Loan | Line of Credit | Amendment No. 2 To Credit Agreement and Waiver                    
Debt Instrument [Line Items]                    
Interest rate     4.00%              
Loan Commitment | Line of Credit | Syndicated Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity                   $ 25,000,000
Letter of Credit | Line of Credit | Syndicated Credit Facility                    
Debt Instrument [Line Items]                    
Long-term debt     $ 14,529,000              
Letter of Credit | Line of Credit | Amendment No. 2 To Credit Agreement and Waiver                    
Debt Instrument [Line Items]                    
Commitment fee percentage 3.35%                  
Number of additional scheduled prepayments of outstanding loans | payment     2