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Stock-Based Compensation - Summary of Activity for Restricted Stock Awards (Details) - $ / shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Number of Shares    
Granted 2,859,342 3,029,949
Weighted Average Grant Date Fair Value    
Granted $ 11.78 $ 11.15
Restricted Stock    
Number of Shares    
Unvested at beginning of year 6,950,335  
Granted 2,859,342  
Vested (2,150,196)  
Canceled (44,519)  
Unvested at end of year 7,614,962  
Weighted Average Grant Date Fair Value    
Unvested at beginning of year $ 11.68  
Granted 11.78  
Vested 12.29  
Canceled 11.53  
Unvested at end of year $ 11.55