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Share-based Compensation - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
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Aug. 07, 2024 | May 31, 2023 | Sep. 30, 2025 USD ($) shares | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Dec. 31, 2024 shares | May 23, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock split, description |  |  |  |  | On July 11, 2024, the Company announced a 10-for-1 stock split of the Company’s class A common stock and class B common stock. The stock split was effected by means of a stock dividend to the holders of record of the Company’s class A common stock and class B common stock as of the close of business on August 1, 2024, the record date for the dividend. Shares held in treasury by the Company were not impacted by the stock split. The dividend was distributed after the close of trading on August 7, 2024 and trading commenced on a split-adjusted basis at market open on August 8, 2024. As a result of the stock split, all applicable share, per share, and equity award information has been retroactively adjusted in the Consolidated Financial Statements and Notes to Consolidated Financial Statements to reflect the stock split for all periods presented. |  |  |
Stock split, conversion ratio | 10 |  |  |  |  |  |  |
Stock Option Awards |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options outstanding, shares |  |  | 3,757,000 |  | 3,757,000 |  | 4,956,000 |
Stock options vested |  |  |  |  | 1,311,010 | 1,609,650 |  |
Aggregate fair value of stock option vested | $ |  |  |  |  | $ 36,800,000 | $ 40,200,000 |  |
Weighted average grant date fair value of stock option awards | $ / shares |  |  |  |  | $ 301.19 | $ 111.23 |  |
Share-based compensation expense recognized | $ |  |  | $ 5,100,000 | $ 9,900,000 | $ 16,900,000 | $ 30,000,000.0 |  |
Unrecognized share-based compensation expense | $ |  |  | 25,200,000 |  | $ 25,200,000 |  |  |
Unrecognized compensation expense expected to be recognized |  |  |  |  | 2 years 3 months 18 days |  |  |
Share-settled Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate fair value of stock option vested | $ |  |  |  |  | $ 20,500,000 | 15,000,000 |  |
Share-based compensation expense recognized | $ |  |  | 6,700,000 | 6,200,000 | 19,000,000 | $ 18,300,000 |  |
Unrecognized share-based compensation expense | $ |  |  | $ 66,500,000 |  | $ 66,500,000 |  |  |
Unrecognized compensation expense expected to be recognized |  |  |  |  | 2 years 10 months 24 days |  |  |
Restricted stock units outstanding |  |  | 809,000 |  | 809,000 |  | 1,231,000 |
Share-settled restricted stock units vested |  |  |  |  | 370,421 | 427,990 |  |
Number of shares withheld to satisfy tax obligations |  |  |  |  |  | 25,060 |  |
Shares issued |  |  |  |  |  | 402,930 |  |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares |  |  |  |  | $ 286.65 | $ 144.88 |  |
Share-settled Performance Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate fair value of stock option vested | $ |  |  |  |  | $ 0 | $ 0 |  |
Unrecognized share-based compensation expense | $ |  |  | $ 18,900,000 |  | $ 18,900,000 |  |  |
Unrecognized compensation expense expected to be recognized |  |  |  |  | 1 year 10 months 24 days |  |  |
Restricted stock units outstanding |  |  | 279,000 |  | 279,000 |  | 307,000 |
Class A | Stock Option Awards |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options outstanding, shares |  |  | 3,756,959 |  | 3,756,959 |  |  |
2013 Equity Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Equity compensation plan expiration period |  | 2023-05 |  |  |  |  |  |
2013 Equity Plan | Other Stock Based Awards and Cash Settled RSUs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation expense recognized | $ |  |  | $ 0 | 300,000 | $ 1,100,000 | $ 2,200,000 |  |
2023 Equity Plan | Share-settled Performance Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Weighted average grant date fair value of stock option awards | $ / shares |  |  |  |  | $ 445.66 | $ 307.13 |  |
Share-based compensation expense recognized | $ |  |  | $ 3,000,000 | 2,400,000 | $ 6,400,000 | $ 5,900,000 |  |
Restricted stock units outstanding |  |  | 279,264 |  | 279,264 |  |  |
2023 Equity Plan | Class A |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation, stock authorized |  |  |  |  |  |  |  | 19,327,030
Shares of class A common stock reserved and available for future issuance |  |  | 2,914,040 |  | 2,914,040 |  |  |
2021 Employee Stock Purchase Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation expense recognized | $ |  |  | $ 700,000 | $ 600,000 | $ 1,900,000 | $ 1,400,000 |  |
Unrecognized share-based compensation expense | $ |  |  | $ 1,500,000 |  | $ 1,500,000 |  |  |
Unrecognized compensation expense expected to be recognized |  |  |  |  | 4 months 24 days |  |  |
2021 Employee Stock Purchase Plan | Class A |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation, stock authorized |  |  | 1,000,000 |  | 1,000,000 |  |  |
Shares of class A common stock reserved and available for future issuance |  |  | 463,596 |  | 463,596 |  |  |
Common stock, shares issued |  |  |  |  | 38,806 |  |  |
Stock Incentive Plan | Share-settled Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted stock units outstanding |  |  | 809,449 |  | 809,449 |  |  |

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