Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable securities:
Gross unrealized gains	$ 1,638	$ 1,178
Gross unrealized losses	(566)	(364)
Total
Cost or amortized cost	1,782,155	1,166,672
Fair value	1,783,227	1,167,486
Money market funds
Cash equivalents:
Cost or amortized cost	497,461	345,555
Commercial paper | Cash equivalents
Marketable securities:
Cost or amortized cost		9,994
Gross unrealized gains		0
Gross unrealized losses		(9)
Fair value		9,985
Commercial paper | Marketable securities
Marketable securities:
Cost or amortized cost	182,264	187,596
Gross unrealized gains	99	148
Gross unrealized losses	(22)	(24)
Fair value	182,341	187,720
U.S. treasury securities
Marketable securities:
Cost or amortized cost		426,734
Gross unrealized gains		697
Gross unrealized losses		(188)
Fair value		427,243
U.S. treasury securities | Cash equivalents
Marketable securities:
Cost or amortized cost	5,979
Gross unrealized gains	2
Gross unrealized losses	0
Fair value	5,981
U.S. treasury securities | Marketable securities
Marketable securities:
Cost or amortized cost	817,996
Gross unrealized gains	1,120
Gross unrealized losses	(396)
Fair value	818,720
U.S. agency bonds
Marketable securities:
Cost or amortized cost	117,965	77,535
Gross unrealized gains	15	13
Gross unrealized losses	(62)	(34)
Fair value	117,918	77,514
Non-U.S. government securities
Marketable securities:
Cost or amortized cost		21,723
Gross unrealized gains		10
Gross unrealized losses		(27)
Fair value		21,706
Corporate bonds
Marketable securities:
Cost or amortized cost		94,725
Gross unrealized gains		310
Gross unrealized losses		(81)
Fair value		94,954
Corporate bonds | Cash equivalents
Marketable securities:
Cost or amortized cost	1,066
Gross unrealized gains	2
Gross unrealized losses	0
Fair value	1,068
Corporate bonds | Marketable securities
Marketable securities:
Cost or amortized cost	159,424
Gross unrealized gains	400
Gross unrealized losses	(86)
Fair value	$ 159,738
Certificates of deposit
Marketable securities:
Cost or amortized cost		2,810
Gross unrealized gains		0
Gross unrealized losses		(1)
Fair value		$ 2,809