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Credit Agreement (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Aug. 13, 2019
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
site
Dec. 31, 2020
USD ($)
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     $ 25,667,000     $ 19,000,000        
Long-term debt     186,859,000     185,571,000        
Notes Payable                    
Debt Instrument [Line Items]                    
Extinguishment of debt, amount   $ 40,000                
Syndicated Credit Facility | Line of Credit                    
Debt Instrument [Line Items]                    
Leverage ratio                 3.75  
Amendment No. 2 To Credit Agreement and Waiver | Line of Credit                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity $ 15,000                  
Interest rate   10.00%                
Commitment fee percentage 3.35%                  
Required scheduled prepayment of outstanding loans, amount   $ 40,000           $ 50,000    
Amount outstanding, threshold for additional interest rate   $ 10,000                
Amendment No. 2 To Credit Agreement and Waiver | Line of Credit | LIBOR                    
Debt Instrument [Line Items]                    
Interest rate 4.00%                  
Amendment No. 2 To Credit Agreement and Waiver | Line of Credit | Base Rate                    
Debt Instrument [Line Items]                    
Interest rate 3.00%                  
Second Amendment Fee | Line of Credit                    
Debt Instrument [Line Items]                    
Credit exposure percentage         1.00%          
Second Amendment Fee | Line of Credit | Minimum                    
Debt Instrument [Line Items]                    
Credit exposure percentage             0.50%      
Second Amendment Fee | Line of Credit | Maximum                    
Debt Instrument [Line Items]                    
Credit exposure percentage   1.50%                
Amendment No. 3 to Credit Agreement | Line of Credit                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity   $ 25,000       15,000        
Maximum capital lease indebtedness   75,000       $ 50,000        
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              
Amendment No. 3 to Credit Agreement | Line of Credit | Forecast                    
Debt Instrument [Line Items]                    
Unused capacity, commitment fee percentage       50.00%            
Commitment fee amount       $ 2,000            
Amendment No. 3 to Credit Agreement | Line of Credit | From December 31, 2020 through June 29, 2021                    
Debt Instrument [Line Items]                    
Leverage ratio   6.50                
Amendment No. 3 to Credit Agreement | Line of Credit | From June 30, 2021 through December 30, 2021                    
Debt Instrument [Line Items]                    
Leverage ratio   6.00                
Amendment No. 3 to Credit Agreement | Line of Credit | As of December 31, 2021 and thereafter                    
Debt Instrument [Line Items]                    
Leverage ratio   3.50                
Amendment No. 3 to Credit Agreement | Line of Credit | As of December 31, 2020                    
Debt Instrument [Line Items]                    
Fixed charge coverage ratio   1.00                
Amendment No. 3 to Credit Agreement | Line of Credit | March 31, 2021 [Member]                    
Debt Instrument [Line Items]                    
Fixed charge coverage ratio   1.20                
Third Amendment Fee | Line of Credit                    
Debt Instrument [Line Items]                    
Credit exposure percentage   0.20%                
Revolving Credit Facility | Syndicated Credit Facility | Line of Credit                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     50,000,000             $ 50,000,000
Revolving Credit Facility | Amendment No. 2 To Credit Agreement and Waiver | Line of Credit                    
Debt Instrument [Line Items]                    
Unused capacity, commitment fee percentage 0.35%                  
Term Loan | Syndicated Credit Facility | Line of Credit                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity                   205,000,000
Term Loan | Amendment No. 2 To Credit Agreement and Waiver | Line of Credit                    
Debt Instrument [Line Items]                    
Interest rate   4.00%                
Loan Commitment | Syndicated Credit Facility | Line of Credit                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity                   $ 25,000,000
Letter of Credit | Syndicated Credit Facility | Line of Credit                    
Debt Instrument [Line Items]                    
Long-term debt     $ 15,479,000              
Letter of Credit | Amendment No. 2 To Credit Agreement and Waiver | Line of Credit                    
Debt Instrument [Line Items]                    
Number of additional scheduled prepayments of outstanding loans | site     2