MARKETABLE DEBT SECURITIES - Summary of Company's Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,648,127	$ 1,420,603
Gross Unrealized Gains	3,030	119
Gross Unrealized Losses	(1,482)	(9,589)
Fair Value	1,649,675	1,411,133
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	892,237	870,033
Gross Unrealized Gains	1,085	79
Gross Unrealized Losses	(588)	(4,382)
Fair Value	892,734	865,730
U.S. government-sponsored enterprise securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	440,915	275,610
Gross Unrealized Gains	1,000	24
Gross Unrealized Losses	(574)	(3,101)
Fair Value	441,341	272,533
Corporate notes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	252,487	211,398
Gross Unrealized Gains	945	16
Gross Unrealized Losses	(320)	(2,106)
Fair Value	253,112	209,308
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	58,901	59,143
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	58,901	59,143
Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,587	4,419
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 3,587	$ 4,419