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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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Fair value portion of asset recognized for present right to economic benefit.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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