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Equity Awards and Instruments - Restricted Stock and Restricted Stock Units Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Restricted Stock | 2020 Incentive Award Plan | Time-Based Vesting          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)   12,454      
Grant date fair value (USD per share)   $ 10.84      
Restricted Stock And Restricted Stock Units (RSUs) | 2020 Incentive Award Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     693,016    
Grant date fair value (USD per share) $ 15.48        
Shares outstanding (in shares)     1,591,200   1,423,715
Shares withheld for tax withholding obligation (in shares)     103,573 12,940  
Share-based compensation tax withholding payment     $ 6,352,000 $ 135,000  
Restricted Stock And Restricted Stock Units (RSUs) | 2020 Incentive Award Plan | Vest Ratably          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 1,197,760        
Restricted Stock And Restricted Stock Units (RSUs) | 2020 Incentive Award Plan | Performance-Based Vesting          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 185,324        
Restricted Stock And Restricted Stock Units (RSUs) | 2020 Incentive Award Plan | Upon Completion Of IPO Vesting          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)   994,912      
Performance Based Restricted Stock Units (RSUs), 2016 | Performance-Based Vesting          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Earned through dividends in period (in shares)     33 3,006  
Performance Based Restricted Stock Units (RSUs), 2016 | 2020 Incentive Award Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost, excluding options     $ 976,000    
Cost not yet recognized, period for recognition     3 months 18 days    
Performance Based Restricted Stock Units (RSUs), 2016 | 2020 Incentive Award Plan | Performance-Based Vesting          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Delivered in period (in shares)     10,864 26,760  
Shares outstanding (in shares)     20,209   31,040
Time-Based Restricted Stock and Restricted Stock Units (RSUs) | 2020 Incentive Award Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     593,208    
Grant date fair value (USD per share)     $ 51.22    
Shares outstanding (in shares)     1,494,517   1,263,193
Unrecognized compensation cost, excluding options     $ 41,995,000    
Cost not yet recognized, period for recognition     2 years 1 month 6 days    
Performance Based Restricted Stock And Restricted Stock Units (RSUs) | 2020 Incentive Award Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     99,808    
Grant date fair value (USD per share)     $ 49.93    
Shares outstanding (in shares)     96,683   160,522
Unrecognized compensation cost, excluding options     $ 0