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Investments - Summary of Investment (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Cash and Cash Equivalents [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | $ 267,605 | $ 242,219
Other Long-term Investment [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | 2,640 | 2,530
Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | 230,421 | 209,489
Estimate of Fair Value Measurement [Member] | Other Long-term Investment [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | 2,640 | 2,530
Estimate of Fair Value Measurement [Member] | Auction Rate Securities [Member] | Other Long-term Investment [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | 2,640 | 2,530
Estimate of Fair Value Measurement [Member] | Money Market Funds [Member] | Cash and Cash Equivalents [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | 230,421 | 209,489
Portion at Other than Fair Value Measurement [Member] | Cash on hand [Member] | Cash and Cash Equivalents [Member] |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Estimated Fair Value | $ 37,184 | $ 32,730

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