Fair Value Measurements - Summary of Fair Value And Unrealized Losses of Marketable Securities In Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 513,738	$ 1,224,715
Less than 12 months, Unrealized Losses	(4,795)	(2,687)
Greater than 12 months, Fair Value	399,783
Greater than 12 months, Unrealized Losses	(5,455)
Fair Value	913,521	1,224,715
Unrealized Losses	(10,250)	(2,687)
U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	112,243	309,588
Less than 12 months, Unrealized Losses	(1,517)	(982)
Greater than 12 months, Fair Value	185,691
Greater than 12 months, Unrealized Losses	(2,745)
Fair Value	297,934	309,588
Unrealized Losses	(4,262)	(982)
U.S. Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	208,507	601,475
Less than 12 months, Unrealized Losses	(1,989)	(1,083)
Greater than 12 months, Fair Value	130,633
Greater than 12 months, Unrealized Losses	(1,541)
Fair Value	339,140	601,475
Unrealized Losses	(3,530)	(1,083)
International Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	50,982	231,672
Less than 12 months, Unrealized Losses	(497)	(491)
Greater than 12 months, Fair Value	68,993
Greater than 12 months, Unrealized Losses	(636)
Fair Value	119,975	231,672
Unrealized Losses	(1,133)	(491)
U.S. Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	24,768	21,968
Less than 12 months, Unrealized Losses	(120)	(18)
Fair Value	24,768	21,968
Unrealized Losses	(120)	(18)
International Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	30,987	35,059
Less than 12 months, Unrealized Losses	(175)	(23)
Fair Value	30,987	35,059
Unrealized Losses	(175)	(23)
U.S. Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	86,251	24,953
Less than 12 months, Unrealized Losses	(497)	(90)
Greater than 12 months, Fair Value	14,466
Greater than 12 months, Unrealized Losses	(533)
Fair Value	100,717	24,953
Unrealized Losses	$ (1,030)	$ (90)