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Stock-based Compensation - Summary of Incremental Stock-Based Compensation Expense from Modifications (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Future Expense $ 136,800    
Options and RSAs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 83,472    
Incremental stock-based compensation expense of modifications 27,701 $ 17,464  
Future Expense 38,307    
Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental stock-based compensation expense of modifications 3,300    
Options | Former CEO | 2021      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 21,948    
Incremental stock-based compensation expense of modifications 4,105    
Future Expense 17,843    
Options | Former CEO | 2020      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 15,052    
Incremental stock-based compensation expense of modifications 6,044 2,755  
Future Expense 6,253    
Options | Other | 2021      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 1,019    
Incremental stock-based compensation expense of modifications 1,019    
Future Expense 0    
Options | Other | 2020      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 4,717    
Incremental stock-based compensation expense of modifications 1,153 2,954  
Future Expense 610    
RSAs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental stock-based compensation expense of modifications     $ 8,600
RSAs | Former CEO | 2021      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 10,908    
Incremental stock-based compensation expense of modifications 3,237    
Future Expense 7,671    
RSAs | Former CEO | 2020      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 20,799    
Incremental stock-based compensation expense of modifications 10,168 4,701  
Future Expense 5,930    
RSAs | Other | 2020      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Incremental stock-based compensation expense of modifications and future expense 9,029    
Incremental stock-based compensation expense of modifications 1,975 $ 7,054  
Future Expense $ 0