Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Marketable securities:
Gross unrealized gains	$ 294	$ 1,178
Gross unrealized losses	(752)	(364)
Total
Cost or amortized cost	1,596,878	1,166,672
Fair value	1,596,420	1,167,486
Money market funds
Cash equivalents:
Cost or amortized cost	876,482	345,555
Commercial paper | Cash equivalents
Marketable securities:
Cost or amortized cost	18,114	9,994
Gross unrealized gains	0	0
Gross unrealized losses	(11)	(9)
Fair value	18,103	9,985
Commercial paper | Marketable securities
Marketable securities:
Cost or amortized cost	167,437	187,596
Gross unrealized gains	28	148
Gross unrealized losses	(68)	(24)
Fair value	167,397	187,720
U.S. treasury securities
Marketable securities:
Cost or amortized cost	392,660	426,734
Gross unrealized gains	136	697
Gross unrealized losses	(436)	(188)
Fair value	392,360	427,243
U.S. agency bonds
Marketable securities:
Cost or amortized cost	45,111	77,535
Gross unrealized gains	17	13
Gross unrealized losses	(77)	(34)
Fair value	45,051	77,514
Non-U.S. government securities
Marketable securities:
Cost or amortized cost	4,880	21,723
Gross unrealized gains	0	10
Gross unrealized losses	(1)	(27)
Fair value	4,879	21,706
Corporate bonds
Marketable securities:
Cost or amortized cost	92,194	94,725
Gross unrealized gains	113	310
Gross unrealized losses	(159)	(81)
Fair value	$ 92,148	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