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Fair Value Measurements - Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Short-term investments	$ 228,324	$ 268,724
Fair Value, Measurements, Recurring
Assets
Total assets	1,067,335	1,127,309
Level 1 | Fair Value, Measurements, Recurring
Assets
Total assets	972,796	1,098,841
Level 2 | Fair Value, Measurements, Recurring
Assets
Total assets	94,539	28,468
Level 3 | Fair Value, Measurements, Recurring
Assets
Total assets	0	0
Money market funds | Fair Value, Measurements, Recurring
Assets
Cash equivalents	569,476	627,983
Money market funds | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	569,476	627,983
Money market funds | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Money market funds | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
U.S. treasury bills | Fair Value, Measurements, Recurring
Assets
Cash equivalents	188,406	230,602
U.S. treasury bills | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	188,406	230,602
U.S. treasury bills | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
U.S. treasury bills | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Commercial paper | Fair Value, Measurements, Recurring
Assets
Cash equivalents	35,355
Commercial paper | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
Commercial paper | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	35,355
Commercial paper | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
Corporate debt securities | Fair Value, Measurements, Recurring
Assets
Cash equivalents	24,621
Short-term investments	2,985	2,975
Corporate debt securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
Short-term investments	0	0
Corporate debt securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	24,621
Short-term investments	2,985	2,975
Corporate debt securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
Short-term investments	0	0
Certificate of deposits | Fair Value, Measurements, Recurring
Assets
Cash equivalents	21,153
Certificate of deposits | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
Certificate of deposits | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	21,153
Certificate of deposits | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0
U.S. treasury securities | Fair Value, Measurements, Recurring
Assets
Short-term investments	214,914	240,256
U.S. treasury securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Short-term investments	214,914	240,256
U.S. treasury securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
U.S. treasury securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
U.S. agency securities | Fair Value, Measurements, Recurring
Assets
Short-term investments		14,993
U.S. agency securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Short-term investments		0
U.S. agency securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Short-term investments		14,993
U.S. agency securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Short-term investments		0
Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Short-term investments	10,425	10,500
Asset-backed securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
Asset-backed securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Short-term investments	10,425	10,500
Asset-backed securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Short-term investments	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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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