Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Oct. 31, 2021
Dec. 31, 2020
Loss Contingencies [Line Items]            
Operating lease expense $ 500 $ 500 $ 1,300 $ 1,600    
Weighted average remaining lease term (in years) 4 years 3 months 18 days   4 years 3 months 18 days     4 years 4 months 24 days
Weighted average rate (percent) 5.90%   5.90%      
Right-of-use asset $ 6,117   $ 6,117     $ 5,973
Lease liabilities 6,605   6,605     6,396
Subsequent Event            
Loss Contingencies [Line Items]            
Insurance settlement receivable         $ 14,900  
Other Assets            
Loss Contingencies [Line Items]            
Right-of-use asset 6,100   6,100     6,000
Accrued Expenses and Other Liabilities            
Loss Contingencies [Line Items]            
Lease liabilities $ 6,600   $ 6,600     6,400
Minimum            
Loss Contingencies [Line Items]            
Lease term (in years) 1 year   1 year      
Maximum            
Loss Contingencies [Line Items]            
Lease term (in years) 7 years   7 years      
Performance Guarantee            
Loss Contingencies [Line Items]            
Performance bonds outstanding $ 114,300   $ 114,300     $ 78,000