Investments - Summary of Fair Value And Unrealized Losses of Marketable Securities In Loss Position (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 332,005	$ 343,373
Less than 12 months, Unrealized Losses	(650)	(611)
Greater than 12 months, Fair Value	57,558	123,121
Greater than 12 months, Unrealized Losses	(229)	(640)
Fair Value	389,563	466,494
Unrealized Losses	(879)	(1,251)
U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	100,615	52,521
Less than 12 months, Unrealized Losses	(141)	(96)
Greater than 12 months, Fair Value	21,462	41,911
Greater than 12 months, Unrealized Losses	(98)	(251)
Fair Value	122,077	94,432
Unrealized Losses	(239)	(347)
U.S. Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	115,218	111,901
Less than 12 months, Unrealized Losses	(283)	(246)
Greater than 12 months, Fair Value	15,430	43,851
Greater than 12 months, Unrealized Losses	(57)	(238)
Fair Value	130,648	155,752
Unrealized Losses	(340)	(484)
International Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	42,335	43,708
Less than 12 months, Unrealized Losses	(114)	(87)
Greater than 12 months, Fair Value	5,718	6,014
Greater than 12 months, Unrealized Losses	(22)	(35)
Fair Value	48,053	49,722
Unrealized Losses	(136)	(122)
U.S. Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	4,914	7,848
Less than 12 months, Unrealized Losses	(1)	(1)
Fair Value	4,914	7,848
Unrealized Losses	(1)	(1)
International Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	18,766	37,300
Less than 12 months, Unrealized Losses	(7)	(38)
Fair Value	18,766	37,300
Unrealized Losses	(7)	(38)
U.S. Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	50,157	90,095
Less than 12 months, Unrealized Losses	(104)	(143)
Greater than 12 months, Fair Value	14,948	31,345
Greater than 12 months, Unrealized Losses	(52)	(116)
Fair Value	65,105	121,440
Unrealized Losses	$ (156)	$ (259)