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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended |
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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

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