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Investments and Fair Value Measurements - Schedule of Available-For-Sale Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 192,184	$ 548,333
Gross Unrealized Gain	2	0
Gross Unrealized Loss	(1,851)	(8,647)
Fair Value	190,335	539,686
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	73,753	291,685
Gross Unrealized Gain	2	0
Gross Unrealized Loss	0	(3,697)
Fair Value	73,755	287,988
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	117,470	217,187
Gross Unrealized Gain	0	0
Gross Unrealized Loss	(1,849)	(4,494)
Fair Value	115,621	212,693
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	961	24,617
Gross Unrealized Gain	0	0
Gross Unrealized Loss	(2)	(286)
Fair Value	959	24,331
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	2,322
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	(101)
Fair Value	0	2,221
Foreign government and supranational securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		12,522
Gross Unrealized Gain		0
Gross Unrealized Loss		(69)
Fair Value	$ 0	$ 12,453

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