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Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) purchase_period $ / shares shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares | May 31, 2021 shares
Stockholders Equity Note [Line Items] |  |  |  |
Stock-based compensation, income tax benefit | $ | $ 13,800 | $ 11,900 | $ 10,300 |
Stock-based compensation expense | $ | $ 114,336 | 98,427 | 88,184 |
Restricted Stock Units (RSUs) |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Vesting period | 4 years |  |  |
Restricted stock units, shares vested and released (shares) | 264,655 |  |  |
Restricted stock units, shares withheld for tax payments | 78,930 |  |  |
Restricted stock units, net issuance (in shares) | 185,725 |  |  |
Vested in period, Fair value | $ | $ 158,800 | $ 89,600 | $ 112,400 |
Granted (usd per share) | $ / shares | $ 600.10 | $ 267.24 | $ 255.42 |
Total unamortized compensation cost | $ | $ 116,800 |  |  |
Weighted average period of total unamortized cost | 2 years 1 month 6 days |  |  |
Market Performance Based Restricted Stock Units |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Restricted stock units, shares vested and released (shares) | 229,877 |  |  |
Restricted stock units, shares withheld for tax payments | 104,317 |  |  |
Restricted stock units, net issuance (in shares) | 125,560 |  |  |
Vested in period, Fair value | $ | $ 135,600 | $ 47,100 | $ 47,700 |
Granted (usd per share) | $ / shares | $ 658.02 |  |  |
Total unamortized compensation cost | $ | $ 38,500 |  |  |
Weighted average period of total unamortized cost | 1 year |  |  |
Percentage of market-performance based restricted stock units eligible to vest over the vesting period | 250.00% |  |  |
Employee Stock Purchase Plan |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Number of shares available for grant (shares) | 2,194,566 |  |  |
Total unamortized compensation cost | $ | $ 10,400 |  |  |
Weighted average period of total unamortized cost | 6 months |  |  |
ESPP offering period | 24 months |  |  |
Number of offering periods | purchase_period | 4 |  |  |
Purchase price of shares, percent of fair market value | 85.00% |  |  |
Number of shares reserved for issuance (in shares) |  |  |  | 4,400,000
Stock-based compensation expense | $ | $ 12,200 | $ 10,500 | $ 12,100 |
Stock Incentive Plan 2005 |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Share award ratio | 1.9 |  |  |
Number of shares reserved for issuance (in shares) | 27,783,379 |  |  |
Number of shares available for grant (shares) | 4,244,723 |  |  |

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