Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale
Fair value, less than 12 months	$ 125,034	$ 68,557
Unrealized losses, less than 12 months	(1,962)	(1,561)
Fair value, 12 months or greater	233,866	233,304
Unrealized losses, 12 months or greater	(6,238)	(8,994)
Total fair value	358,900	301,861
Total unrealized Losses	(8,200)	(10,555)
Corporate bonds
Debt Securities, Available-for-sale
Fair value, less than 12 months	93,328	30,770
Unrealized losses, less than 12 months	(962)	(359)
Fair value, 12 months or greater	203,251	226,643
Unrealized losses, 12 months or greater	(5,556)	(8,807)
Total fair value	296,579	257,413
Total unrealized Losses	(6,518)	(9,166)
Treasury notes
Debt Securities, Available-for-sale
Fair value, less than 12 months	22,107	20,725
Unrealized losses, less than 12 months	(284)	(153)
Fair value, 12 months or greater	22,936	2,441
Unrealized losses, 12 months or greater	(536)	(60)
Total fair value	45,043	23,166
Total unrealized Losses	(820)	(213)
Asset-backed securities
Debt Securities, Available-for-sale
Fair value, less than 12 months	9,599	17,062
Unrealized losses, less than 12 months	(716)	(1,049)
Fair value, 12 months or greater	5,705	2,252
Unrealized losses, 12 months or greater	(95)	(47)
Total fair value	15,304	19,314
Total unrealized Losses	(811)	(1,096)
Sovereign bonds
Debt Securities, Available-for-sale
Fair value, less than 12 months	0	0
Unrealized losses, less than 12 months	0	0
Fair value, 12 months or greater	1,974	1,968
Unrealized losses, 12 months or greater	(51)	(80)
Total fair value	1,974	1,968
Total unrealized Losses	$ (51)	$ (80)