Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Marketable securities:
Gross unrealized gains	$ 158	$ 1,178
Gross unrealized losses	(1,144)	(364)
Total
Cost or amortized cost	1,618,644	1,166,672
Fair value	1,617,658	1,167,486
Money market funds
Cash equivalents:
Cost or amortized cost	352,687	345,555
Commercial paper | Cash equivalents
Marketable securities:
Cost or amortized cost	33,887	9,994
Gross unrealized gains	0	0
Gross unrealized losses	(15)	(9)
Fair value	33,872	9,985
Commercial paper | Marketable securities
Marketable securities:
Cost or amortized cost	207,299	187,596
Gross unrealized gains	2	148
Gross unrealized losses	(142)	(24)
Fair value	207,159	187,720
U.S. treasury securities
Marketable securities:
Cost or amortized cost	794,614	426,734
Gross unrealized gains	100	697
Gross unrealized losses	(549)	(188)
Fair value	794,165	427,243
U.S. agency bonds
Marketable securities:
Cost or amortized cost	89,983	77,535
Gross unrealized gains	0	13
Gross unrealized losses	(191)	(34)
Fair value	89,792	77,514
Non-U.S. government securities
Marketable securities:
Cost or amortized cost	4,938	21,723
Gross unrealized gains	0	10
Gross unrealized losses	(3)	(27)
Fair value	4,935	21,706
Corporate bonds
Marketable securities:
Cost or amortized cost	135,236	94,725
Gross unrealized gains	56	310
Gross unrealized losses	(244)	(81)
Fair value	$ 135,048	94,954
Certificates of deposit
Marketable securities:
Cost or amortized cost		2,810
Gross unrealized gains		0
Gross unrealized losses		(1)
Fair value		$ 2,809