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Employee Equity-Based Compensation - Summary of RSU and Performance-based Award Activity (Details) - RSUs and PSAs
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Number of Shares  
Beginning balance (shares) | shares 526,414
Granted (shares) | shares 2,678,948
Forfeited (shares) | shares (225,359)
Vested/Released (shares) | shares (659,539)
Ending balance (shares) | shares 2,320,464
Weighted Average Grant Date Fair Value per Share  
Beginning balance (usd per share) | $ / shares $ 11.17
Granted (usd per share) | $ / shares 11.28
Forfeited (usd per share) | $ / shares 11.80
Vested/Released (usd per share) | $ / shares 12.23
Ending balance (usd per share) | $ / shares $ 10.78