Cash, Cash Equivalents and Marketable Securities - Schedule of cash, cash equivalents and available-for-sale marketable securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cash and cash equivalents:
Total cash and cash equivalents	$ 499,597	$ 99,915
Marketable securities:
Unrealized gains	5	476
Unrealized losses	(373)	(8)
Cost	1,063,162	633,663
Fair value	1,062,794	634,131
Corporate debt securities
Cash and cash equivalents:
Total cash and cash equivalents	2,519	3,664
Marketable securities:
Cost	219,363	382,028
Unrealized gains	0	195
Unrealized losses	(149)	(7)
Fair value	219,214	382,216
Corporate debt securities due within 1 to 2 years of date of purchase
Marketable securities:
Cost		977
Unrealized gains		1
Unrealized losses		0
Fair value		978
US government and government sponsored entities
Cash and cash equivalents:
Total cash and cash equivalents		14,967
U.S. government and government sponsored entities due within 1 year of date of purchase
Marketable securities:
Cost	344,202	150,743
Unrealized gains	5	280
Unrealized losses	(224)	(1)
Fair value	343,983	151,022
Cash
Cash and cash equivalents:
Total cash and cash equivalents	20,323	2,729
Money market funds
Cash and cash equivalents:
Total cash and cash equivalents	$ 476,755	$ 78,555