Fair Value Measurements - Summary of Fair Value And Unrealized Losses of Marketable Securities In Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 343,373	$ 513,738
Less than 12 months, Unrealized Losses	(611)	(4,795)
Greater than 12 months, Fair Value	123,121	399,783
Greater than 12 months, Unrealized Losses	(640)	(5,455)
Fair Value	466,494	913,521
Unrealized Losses	(1,251)	(10,250)
U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	52,521	112,243
Less than 12 months, Unrealized Losses	(96)	(1,517)
Greater than 12 months, Fair Value	41,911	185,691
Greater than 12 months, Unrealized Losses	(251)	(2,745)
Fair Value	94,432	297,934
Unrealized Losses	(347)	(4,262)
U.S. Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	111,901	208,507
Less than 12 months, Unrealized Losses	(246)	(1,989)
Greater than 12 months, Fair Value	43,851	130,633
Greater than 12 months, Unrealized Losses	(238)	(1,541)
Fair Value	155,752	339,140
Unrealized Losses	(484)	(3,530)
International Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	43,708	50,982
Less than 12 months, Unrealized Losses	(87)	(497)
Greater than 12 months, Fair Value	6,014	68,993
Greater than 12 months, Unrealized Losses	(35)	(636)
Fair Value	49,722	119,975
Unrealized Losses	(122)	(1,133)
U.S. Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	7,848	24,768
Less than 12 months, Unrealized Losses	(1)	(120)
Fair Value	7,848	24,768
Unrealized Losses	(1)	(120)
International Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	37,300	30,987
Less than 12 months, Unrealized Losses	(38)	(175)
Fair Value	37,300	30,987
Unrealized Losses	(38)	(175)
U.S. Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	90,095	86,251
Less than 12 months, Unrealized Losses	(143)	(497)
Greater than 12 months, Fair Value	31,345	14,466
Greater than 12 months, Unrealized Losses	(116)	(533)
Fair Value	121,440	100,717
Unrealized Losses	$ (259)	$ (1,030)