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Stock-Related Benefit Plans - Summary of Activity for Restricted Stock Awards (Details)
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Number of Shares  
Granted | shares 3,131,949
Weighted Average Grant Date Fair Value  
Granted | $ / shares $ 11.20
Restricted Stock  
Number of Shares  
Unvested at beginning of year | shares 6,228,048
Granted | shares 3,131,949
Vested | shares (2,107,282)
Canceled | shares (302,380)
Unvested at end of year | shares 6,950,335
Weighted Average Grant Date Fair Value  
Unvested at beginning of year | $ / shares $ 12.43
Granted | $ / shares 11.20
Vested | $ / shares 13.15
Canceled | $ / shares 11.71
Unvested at end of year | $ / shares $ 11.68