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Incentive Compensation Plans - Class A Common Stock Options Narrative (Details)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
award_type
$ / shares
Aug. 31, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of award types | award_type 2  
Expected dividend yield 0.00%  
Expected volatility rate 45.00%  
Risk-free interest rate 1.70%  
Unrecognized compensation expense | $ $ 11,398  
Weighted average period, expected expense recognition 2 years  
2019 Omnibus Incentive Compensation Plan | Common Class A    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares reserved for future issuance (in shares) | shares   38,486,295
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term 6 years  
Weighted average fair value per option (in dollars per share) $ 10.29  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term 6 years 6 months  
Weighted average fair value per option (in dollars per share) $ 10.68