Fair Value Measurements and Fair Value of Financial Instruments - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets:
Investments, Fair Value	$ 845,451
Fair Value, Recurring
Assets:
Cash and cash equivalents, Amortized Cost	397,616	$ 834,691
Cash and cash equivalents, Gross Unrealized Losses	(165)	(34)
Cash and cash equivalents, Fair Value	397,451	834,657
Investments, Amortized Cost	845,109	123,595
Investments, Gross Unrealized Gains	615	39
Investments, Gross Unrealized Losses	(273)	(366)
Investments, Fair Value	845,451	123,268
Total assets measured at fair value, Amortized Cost	1,242,725	958,286
Total assets measured at fair value, Gross Unrealized Gains	615	39
Total assets measured at fair value, Gross Unrealized Losses	(438)	(400)
Total assets measured at fair value, Fair Value	1,242,902	957,925
Fair Value, Recurring | Cash | Level 1
Assets:
Cash and cash equivalents, Amortized Cost	50,003	56,198
Cash and cash equivalents, Fair Value	50,003	56,198
Fair Value, Recurring | Money Market Funds | Level 1
Assets:
Cash and cash equivalents, Amortized Cost	47,357	680,934
Cash and cash equivalents, Fair Value	47,357	680,934
Fair Value, Recurring | Commercial Paper | Level 2
Assets:
Cash and cash equivalents, Amortized Cost	300,256	92,581
Cash and cash equivalents, Gross Unrealized Losses	(165)	(34)
Cash and cash equivalents, Fair Value	300,091	92,547
Fair Value, Recurring | U.S. Treasury Securities | Level 1
Assets:
Investments, Amortized Cost	481,704	37,651
Investments, Gross Unrealized Gains	422
Investments, Gross Unrealized Losses	(44)	(70)
Investments, Fair Value	482,082	37,581
Fair Value, Recurring | Commercial paper | Level 2
Assets:
Investments, Amortized Cost	102,435	28,161
Investments, Gross Unrealized Gains	7
Investments, Gross Unrealized Losses	(35)	(17)
Investments, Fair Value	102,407	28,144
Fair Value, Recurring | Corporate Debt | Level 2
Assets:
Investments, Amortized Cost	133,523	25,402
Investments, Gross Unrealized Gains	168
Investments, Gross Unrealized Losses	(42)	(131)
Investments, Fair Value	133,649	25,271
Fair Value, Recurring | Asset backed securities | Level 2
Assets:
Investments, Amortized Cost	23,963	6,954
Investments, Gross Unrealized Gains	18	20
Investments, Fair Value	23,981	6,974
Fair Value, Recurring | U.S. Government Agency Securities | Level 2
Assets:
Cash and cash equivalents, Amortized Cost		4,978
Cash and cash equivalents, Fair Value		4,978
Investments, Amortized Cost	103,484	25,427
Investments, Gross Unrealized Gains		19
Investments, Gross Unrealized Losses	(152)	(148)
Investments, Fair Value	$ 103,332	$ 25,298