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Fair Value of Financial Instruments (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2023
Assets, Fair Value Disclosure [Abstract] |  |  |
Interest income on cash investments | $ 8,900,000 | $ 10,400,000 |
Level 2 |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Assets classified as level 2 or level 3, fair value | 0 | 0 |
Liabilities classified as level 2 or level 3, fair value |  |  | $ 0
Level 3 |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Assets classified as level 2 or level 3, fair value |  |  | 0
Liabilities classified as level 2 or level 3, fair value | 0 | 0 |
Fair value, recurring | Level 1 |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Financial assets held in marketable securities | 144,200,000 | 144,200,000 | 273,800,000
Fair value, recurring | Money market funds | Level 1 |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Financial assets held in money market accounts | $ 95,000,000.0 | $ 95,000,000.0 | $ 35,200,000

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