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Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock - $ / shares
12 Months Ended
Mar. 12, 2020
Dec. 31, 2020
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares, Nonvested at January 1, 2020   2,601,972  
Shares, Granted   1,605,209  
Shares, Vested   (400,798)  
Shares, Forfeited (371,329) (546,994)  
Shares, Nonvested at December 31, 2020   3,259,389 2,601,972
Weighted Average Grant-Date Fair Value, Nonvested at January 1, 2020   $ 18.21  
Weighted Average Grant-Date Fair Value, Granted   7.17 $ 18.52
Weighted Average Grant-Date Fair Value, Vested   13.58  
Weighted Average Grant-Date Fair Value, Forfeited   18.41  
Weighted Average Grant-Date Fair Value, Nonvested at December 31, 2020   $ 13.51 $ 18.21