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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 21, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of Options, Granted         971,000    
Allocated share based compensation expenses   $ 44,967   $ 3,369 $ 48,922 $ 7,711  
Share based compensation by share based arrangement equity instruments other than options granted during the period         1,771    
Two Thousand And Twenty One Equity Incentive Plan [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of shares authorized 18,946,871 18,946,871     18,946,871    
Two Thousand And Twenty One Employee Stock Purchase Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of shares authorized 3,552,538 3,552,538     3,552,538    
Employee Stock Option Member              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense total unrecognized $ 93,300 $ 93,300     $ 93,300    
Stock-based compensation weighted-average year   2 years 10 months 24 days          
Employee Stock Option Member | Executive Officer [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense total unrecognized $ 11,200 $ 11,200     $ 11,200    
Stock-based compensation weighted-average year   4 years 1 month 6 days          
Number of Options, Granted       0 970,970    
Allocated share based compensation expenses   $ 200          
Employee Stock Option Member | Executive Officer [Member] | Time Based Options [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of equity instruments other than options outstanding for which the vesting conditions were modified 1,706,888 1,706,888     1,706,888    
Employee Stock Option Member | Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of options outstanding for which the vesting conditions were modified Vesting percentage 25.00% 25.00%     25.00%    
Employee Stock Option Member | Executive Officers And Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of options outstanding for which the vesting conditions were modified 4,477,218 4,477,218     4,477,218    
Employee Stock Option Member | Executive Officers And Employees [Member] | Performance Shares [Member] | Service Based Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based payment arrangement plan modification incremental costs $ 76,600            
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation $ 53,300 $ 53,300     $ 53,300    
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation period of recognition 3 years            
Employee Stock Option Member | Executive Officers And Employees [Member] | Modified Vesting Conditions [Member] | Performance Shares [Member] | Service Based Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated share based compensation expenses $ 23,300            
Employee Stock Option Member | One Executive Officer [Member] | Two Thousand And Nineteen Performance Options [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of options outstanding for which the vesting conditions were modified 3,627,936 3,627,936     3,627,936    
Share based payment arrangement plan modification incremental costs $ 11,400            
Employee Stock Option Member | One Executive Officer [Member] | Two Thousand And Nineteen Performance Options [Member] | Service Based Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated share based compensation expenses 6,600            
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation $ 12,600 $ 12,600     $ 12,600    
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation period of recognition 2 years 3 months 18 days            
Employee Stock Option Member | Terminated Employees [Member] | Modified Vesting Conditions [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated share based compensation expenses         $ 900    
Share based compensation by share based payment award number of options outstanding for which the vesting conditions were modified 48,300 48,300     48,300    
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation weighted-average year   3 years 4 months 24 days          
Allocated share based compensation expenses   $ 11,700   $ 800 $ 12,200 2,400  
Share based compensation by share based payment fair value         8,400 $ 2,300  
Share based compensation by share based arrangement unrecognized compensation expense other than options $ 67,700 $ 67,700     $ 67,700    
Share based compensation by share based arrangement equity instruments other than options vested upon the effectiveness of initial public offer 256,936 256,936     256,936    
Restricted Stock Units (RSUs) [Member] | Liquidity Event Restricted Stock Units [Member] | Time Based Liquidity Event Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated share based compensation expenses $ 10,600            
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Liquidity Event Restricted Stock Units [Member] | Time Based Liquidity Event Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation $ 35,900 $ 35,900     $ 35,900    
Share based compensation by share based payment award options outstanding for which the vesting conditions were modified unrecognized compensation period of recognition 3 years 2 months 12 days            
Share based compensation by share based payment award accelerated vesting number         1,725,942    
Share based compensation by share based payment award number of equity instruments other than options outstanding for which accelerated vesting is applicable gross compensation expense         $ 43,300    
Share based payment arrangement accelerated cost recognized $ 7,400            
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Service Based Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation weighted-average year   4 years 1 month 6 days          
Allocated share based compensation expenses   $ 200          
Share based compensation by share based arrangement unrecognized compensation expense other than options $ 10,600 10,600     $ 10,600    
Share based compensation by share based arrangement equity instruments other than options granted during the period         388,389    
Share based compensation by share based arrangement equity instruments other than options granted during the period aggregate fair value   $ 10,800          
Restricted Stock Units (RSUs) [Member] | Director [Member] | Service Based Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based arrangement equity instruments other than options granted during the period         14,284    
Share based compensation by share based arrangement equity instruments other than options granted during the period aggregate fair value         $ 400    
Restricted Stock Units (RSUs) [Member] | Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based arrangement equity instruments other than options granted during the period     30,434        
Percentage of assets sold or transferred for equity instruments other than options to vest     50.00%        
Restricted Stock Units (RSUs) [Member] | Employees [Member] | Liquidity Event Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based arrangement equity instruments other than options granted during the period         1,338,028    
Percentage of assets sold or transferred for equity instruments other than options to vest 50.00% 50.00%     50.00%    
Share based compensation by share based arrangement equity instruments other than options period of retention from the date of the grant         6 years 6 months    
Restricted Stock Units (RSUs) [Member] | Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based payment award number of equity instruments other than options outstanding for which the vesting conditions were modified 111,902 111,902     111,902    
Share based compensation by share based payment award number of equity instruments other than options outstanding for which the vesting conditions were modified vesting percentage         25.00%    
Restricted Stock Units (RSUs) [Member] | Employees [Member] | Performance Shares [Member] | Service Vesting Condition [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based payment arrangement plan modification incremental costs $ 2,900            
Share based compensation by share based payment award number of equity instruments other than options for which the vesting conditions were modified unrecognized compensation $ 2,700 $ 2,700     $ 2,700    
Share based compensation by share based payment award number of equity instruments other than options for which the vesting conditions were modified unrecognized compensation period of recognition 3 years 3 months 18 days            
Restricted Stock Units (RSUs) [Member] | Employees [Member] | Modified Vesting Conditions [Member] | Performance Shares [Member] | Service Vesting Condition [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated share based compensation expenses $ 200            
Restricted Stock Units (RSUs) [Member] | Maximum [Member] | Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based arrangement vesting percentage     100.00%        
Share Price     $ 29.46        
Restricted Stock Units (RSUs) [Member] | Minimum [Member] | Employees [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation by share based arrangement vesting percentage     0.00%        
Share Price     $ 19.64        
Two Thousand And Two Thousand And Twenty Performance Options Performance Restricted Stock Units And Liquidity Restricted Event Restricted Stock Units [Member] | Median [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share Price             $ 25.50