Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Marketable securities:
Gross unrealized gains	$ 1,568	$ 1,638
Gross unrealized losses	(311)	(566)
Total
Cost or amortized cost	1,991,928	1,782,155
Fair value	1,993,185	1,783,227
Money market funds
Cash equivalents:
Cost or amortized cost	621,940	497,461
U.S. treasury securities | Cash equivalents
Marketable securities:
Cost or amortized cost	19,967	5,979
Gross unrealized gains	0	2
Gross unrealized losses	0	0
Fair value	19,967	5,981
U.S. treasury securities | Marketable securities
Marketable securities:
Cost or amortized cost	665,971	817,996
Gross unrealized gains	899	1,120
Gross unrealized losses	(70)	(396)
Fair value	666,800	818,720
Certificates of deposit
Cash equivalents:
Cost or amortized cost	25,397
U.S. agency bonds | Marketable securities
Marketable securities:
Cost or amortized cost	301,916	117,965
Gross unrealized gains	77	15
Gross unrealized losses	(207)	(62)
Fair value	301,786	117,918
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	239,906	159,424
Gross unrealized gains	586	400
Gross unrealized losses	(16)	(86)
Fair value	240,476	159,738
Commercial paper | Marketable securities
Marketable securities:
Cost or amortized cost	116,831	182,264
Gross unrealized gains	6	99
Gross unrealized losses	(18)	(22)
Fair value	$ 116,819	$ 182,341