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Investments and Fair Value Measurements - Schedule of Marketable Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Cost	$ 931,804	$ 587,368
Gross Unrealized Gains	50	283
Gross Unrealized Losses	(1,215)	(555)
Fair Value	930,639	587,096
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Cost	857	1,463
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	857	1,463
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Cost	600,984	315,608
Gross Unrealized Gains	0	191
Gross Unrealized Losses	(795)	(362)
Fair Value	600,189	315,437
U.S. agency and government sponsored securities
Debt Securities, Available-for-sale [Line Items]
Cost	261,681	239,358
Gross Unrealized Gains	14	78
Gross Unrealized Losses	(319)	(177)
Fair Value	261,376	239,259
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost	23,027	17,382
Gross Unrealized Gains	1	9
Gross Unrealized Losses	(14)	0
Fair Value	23,014	17,391
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cost	1,000	927
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	1,000	928
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost	44,255	12,630
Gross Unrealized Gains	35	4
Gross Unrealized Losses	(87)	(16)
Fair Value	$ 44,203	$ 12,618

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