Investments - Continuous Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	$ (27)	$ (4,229)
Fair Value	31,362	360,079
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	0	(2,598)
Fair Value	0	158,888
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	0	(75)
Fair Value	741	4,924
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	0	(232)
Fair Value	0	74,523
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	(27)	(1,214)
Fair Value	30,621	109,909
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses	0	(110)
Fair Value	$ 0	$ 11,835