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Stock-based Compensation Expense - Additional Information (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2021
USD ($)
tranche
$ / shares
shares
Sep. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2023
measure
$ / shares
shares
Mar. 31, 2023
USD ($)
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
period
$ / shares
shares
Mar. 31, 2022
USD ($)
Sep. 30, 2023
USD ($)
plan
$ / shares
shares
Sep. 30, 2022
USD ($)
Dec. 31, 2022
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of plans | plan               3    
Allocated share based compensation   $ 220,022     $ 161,359     $ 617,288 $ 420,042  
2020 Equity Incentive Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share based compensation by share based payment arrangement contractual term   24 months   24 months            
Plan modification, incremental cost   $ 7,300   $ 3,100            
2020 Employee Stock Purchase Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Allocated share based compensation   $ 8,700     6,800     $ 24,100 17,800  
Stock options outstanding | 2004 Incentive Stock Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share based compensation by share based payment arrangement number of shares available for issuance (in shares) | shares   0           0    
RSUs outstanding                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grant date fair value (in dollars per share) | $ / shares   $ 44.48           $ 44.48   $ 48.73
Granted, weighted average grant date fair value (in dollars per share) | $ / shares               $ 39.48    
RSUs outstanding | CEO Long Term Performance Award | Founder CEO                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of RSUs eligible to vest (in shares) | shares 11,500,000                  
Share-based compensation arrangement by share-based payment award, beginning of award performance period, period after effective date 2 years                  
Share-based compensation arrangement by share-based payment award, number of tranches | tranche 7                  
Number of consecutive trading days for the stock hurdle price to be achieved 90 days                  
Share price (in dollars per share) | $ / shares $ 165.00                  
Grant date fair value (in dollars per share) | $ / shares $ 20.19                  
Unrecognized compensation, equity instruments other than options $ 232,200                  
Allocated share based compensation   $ 12,300     36,500     $ 12,300 36,500  
RSUs outstanding | Minimum | CEO Long Term Performance Award | Founder CEO                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share based payment arrangement, unvested award, period for recognition 3 years 5 months 12 days                  
RSUs outstanding | Maximum | CEO Long Term Performance Award | Founder CEO                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share based payment arrangement, unvested award, period for recognition 5 years 4 months 17 days                  
Performance-Based Restricted Stock Units (RSUs) | 2023 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Allocated share based compensation   1,400           2,900    
PSU target number of shares (in shares) | shares     362,458              
Performance stock units, performance period     2 years              
Granted, weighted average grant date fair value (in dollars per share) | $ / shares     $ 45.70              
Share-based compensation arrangement by share-based payment award, equity instruments other than options, number of performance measures | measure     2              
Share-based compensation arrangement by share-based payment award, target number of shares, performance measures of cumulative, percentage     80.00%              
Share-based compensation arrangement by share-based payment award, target number of shares, adjusted EBITDA, percentage     20.00%              
Performance-Based Restricted Stock Units (RSUs) | 2023 PSU Grants | Share-Based Payment Arrangement, Tranche One                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     50.00%              
Performance-Based Restricted Stock Units (RSUs) | 2023 PSU Grants | Share-Based Payment Arrangement, Tranche Two                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     50.00%              
Performance-Based Restricted Stock Units (RSUs) | 2022 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Allocated share based compensation   $ 200     $ 1,000     $ 2,200 $ 2,000  
PSU target number of shares (in shares) | shares           207,284        
Performance stock units, performance period           3 years        
Granted, weighted average grant date fair value (in dollars per share) | $ / shares           $ 43.13        
Estimated total share-based payment expense           $ 8,900        
Share-based payment award, number of measurement periods | period           5        
Performance-Based Restricted Stock Units (RSUs) | Minimum | 2023 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares earned of the target number of shares     0.00%              
Performance-Based Restricted Stock Units (RSUs) | Minimum | 2022 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares earned of the target number of shares           0.00%        
Performance-Based Restricted Stock Units (RSUs) | Maximum | 2023 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares earned of the target number of shares     200.00%              
Performance-Based Restricted Stock Units (RSUs) | Maximum | 2022 PSU Grants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares earned of the target number of shares           200.00%        
Employee Stock Purchase Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share based compensation by share based payment arrangement contractual term         24 months   24 months      
Plan modification, incremental cost         $ 5,100   $ 4,700