Investments - Summary of Fair Value And Unrealized Losses of Marketable Securities In Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	$ 102,290	$ 343,373
Less than 12 months, Unrealized Losses	(149)	(611)
Greater than 12 months, Fair Value	10,197	123,121
Greater than 12 months, Unrealized Losses	(4)	(640)
Fair Value	112,487	466,494
Unrealized Losses	(153)	(1,251)
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	11,032	52,521
Less than 12 months, Unrealized Losses	(5)	(96)
Greater than 12 months, Fair Value		41,911
Greater than 12 months, Unrealized Losses		(251)
Fair Value	11,032	94,432
Unrealized Losses	(5)	(347)
U.S. Corporate Bonds [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	83,946	111,901
Less than 12 months, Unrealized Losses	(129)	(246)
Greater than 12 months, Fair Value	10,197	43,851
Greater than 12 months, Unrealized Losses	(4)	(238)
Fair Value	94,143	155,752
Unrealized Losses	(133)	(484)
International Corporate Bonds [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	7,312	43,708
Less than 12 months, Unrealized Losses	(15)	(87)
Greater than 12 months, Fair Value		6,014
Greater than 12 months, Unrealized Losses		(35)
Fair Value	7,312	49,722
Unrealized Losses	$ (15)	(122)
U.S. Commercial Paper [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value		7,848
Less than 12 months, Unrealized Losses		(1)
Fair Value		7,848
Unrealized Losses		(1)
International Commercial Paper [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value		37,300
Less than 12 months, Unrealized Losses		(38)
Fair Value		37,300
Unrealized Losses		(38)
U.S. Municipal Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value		90,095
Less than 12 months, Unrealized Losses		(143)
Greater than 12 months, Fair Value		31,345
Greater than 12 months, Unrealized Losses		(116)
Fair Value		121,440
Unrealized Losses		$ (259)