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Stock Based Compensation - Summary of Transactions in Connection with Equity Incentive Plans (Details)
3 Months Ended
Mar. 31, 2021
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding as of the beginning of year (in shares) 1,120,541
Outstanding as of the end of year (in shares) 1,120,541
Restricted Stock  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding as of the beginning of year (in shares) 436,714
Granted (in shares) 815,550 [1]
Vested (in shares) (193,187)
Outstanding as of the end of year (in shares) 1,059,077
[1] Excludes 157,455 grants of performance-based stock units that are not considered outstanding until such time that they become probable to vest.