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Employee Benefit Plans - Summary of Restricted Stock Units (Details) - Restricted Stock Units - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Number of Shares    
Unvested, Beginning balance 7,000,855  
Granted 2,764,398  
Vested (966,637)  
Forfeited/cancelled (469,916)  
Unvested, Ending balance 8,328,700 7,000,855
Weighted Average Grant-Date Fair Value    
Unvested, Beginning balance $ 17.72  
Granted 26.89  
Vested 16.29  
Forfeited/cancelled 18.65  
Unvested, Ending balance $ 20.88 $ 17.72
Weighted Average Remaining Contractual Term (in years)    
Unvested, Weighted Average Remaining Contractual Term 1 year 2 months 12 days 1 year 1 month 6 days