Fair Value Measurements - Summary of Gross Unrealized Gains and Losses of Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 683,006	$ 1,120,000
Gross Unrealized Gains	437	44
Gross Unrealized Losses	(1,251)	(10,250)
Fair Value	682,192	1,109,794
U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	167,165	307,173
Gross Unrealized Gains	107
Gross Unrealized Losses	(347)	(4,262)
Fair Value	166,925	302,911
U.S. Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	210,491	358,019
Gross Unrealized Gains	191	6
Gross Unrealized Losses	(484)	(3,530)
Fair Value	210,198	354,495
International Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	97,698	128,374
Gross Unrealized Gains	99	7
Gross Unrealized Losses	(122)	(1,133)
Fair Value	97,675	127,248
U.S. Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,360	63,234
Gross Unrealized Gains	11
Gross Unrealized Losses	(1)	(120)
Fair Value	23,370	63,114
International Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	46,935	133,338
Gross Unrealized Gains	3
Gross Unrealized Losses	(38)	(175)
Fair Value	46,900	133,163
U.S. Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,830	15,613
Fair Value	8,830	15,613
U.S. Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	128,527	114,249
Gross Unrealized Gains	26	31
Gross Unrealized Losses	(259)	(1,030)
Fair Value	$ 128,294	$ 113,250