Fair Value Measurements - Summary of Gross Unrealized Gains and Losses of Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,120,000	$ 1,450,723
Gross Unrealized Gains	44	27
Gross Unrealized Losses	(10,250)	(2,687)
Fair Value	1,109,794	1,448,063
U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	307,173	325,514
Gross Unrealized Losses	(4,262)	(982)
Fair Value	302,911	324,532
U.S. Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	358,019	628,836
Gross Unrealized Gains	6	27
Gross Unrealized Losses	(3,530)	(1,083)
Fair Value	354,495	627,780
International Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	128,374	237,303
Gross Unrealized Gains	7
Gross Unrealized Losses	(1,133)	(491)
Fair Value	127,248	236,812
U.S. Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	63,234	80,194
Gross Unrealized Losses	(120)	(18)
Fair Value	63,114	80,176
International Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	133,338	142,358
Gross Unrealized Losses	(175)	(23)
Fair Value	133,163	142,335
U.S. Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,613
Fair Value	15,613
U.S. Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	114,249	36,518
Gross Unrealized Gains	31
Gross Unrealized Losses	(1,030)	(90)
Fair Value	$ 113,250	$ 36,428