MARKETABLE DEBT SECURITIES - Summary of Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,643,698	$ 1,787,465
Gross Unrealized Gains	3,036	2,722
Gross Unrealized Losses	(462)	(1,178)
Fair Value	1,646,272	1,789,009
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	802,024	957,145
Gross Unrealized Gains	1,646	1,377
Gross Unrealized Losses	(144)	(467)
Fair Value	803,526	958,055
U.S. government-sponsored enterprise securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	416,708	405,890
Gross Unrealized Gains	567	575
Gross Unrealized Losses	(201)	(370)
Fair Value	417,074	406,095
Corporate notes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	372,040	361,311
Gross Unrealized Gains	813	769
Gross Unrealized Losses	(117)	(341)
Fair Value	372,736	361,739
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47,926	58,117
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	47,926	58,117
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,000	5,002
Gross Unrealized Gains	10	1
Gross Unrealized Losses	0	0
Fair Value	$ 5,010	$ 5,003

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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