Cash Equivalents and Investments - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	$ 210,559	$ 917,186
Less than 12 Months, Unrealized Losses	(160)	(4,006)
12 Months or Greater, Fair Value	65,032	0
12 Months or Greater, Unrealized Losses	(54)	0
Total, Fair Value	275,591	917,186
Total, Unrealized Losses	(214)	(4,006)
U.S. Treasury securities
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	141,181	486,424
Less than 12 Months, Unrealized Losses	(82)	(2,547)
12 Months or Greater, Fair Value	62,000	0
12 Months or Greater, Unrealized Losses	(45)	0
Total, Fair Value	203,181	486,424
Total, Unrealized Losses	(127)	(2,547)
U.S. agency securities
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	47,443	182,475
Less than 12 Months, Unrealized Losses	(65)	(197)
12 Months or Greater, Fair Value	0	0
12 Months or Greater, Unrealized Losses	0	0
Total, Fair Value	47,443	182,475
Total, Unrealized Losses	(65)	(197)
Commercial paper
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	10,797
Less than 12 Months, Unrealized Losses	(2)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	10,797
Total, Unrealized Losses	(2)
Corporate debt securities
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	11,138	248,287
Less than 12 Months, Unrealized Losses	(11)	(1,262)
12 Months or Greater, Fair Value	3,032	0
12 Months or Greater, Unrealized Losses	(9)	0
Total, Fair Value	14,170	248,287
Total, Unrealized Losses	$ (20)	$ (1,262)