Marketable Securities - Summary of Available -for-sale Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 671,945	$ 785,473
Gross Unrealized Gains	1,281	522
Gross Unrealized Losses	(678)	(656)
Estimated Fair Value	672,548	785,339
U.S. Treasury and Other Government - Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	352,309	382,260
Gross Unrealized Gains	580	302
Gross Unrealized Losses	(273)	(254)
Estimated Fair Value	352,616	382,308
Financial Institution Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	217,544	246,270
Gross Unrealized Gains	528	92
Gross Unrealized Losses	(245)	(243)
Estimated Fair Value	217,827	246,119
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	94,924	97,490
Gross Unrealized Gains	163	53
Gross Unrealized Losses	(160)	(135)
Estimated Fair Value	94,927	97,408
Other Asset Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	7,168	59,453
Gross Unrealized Gains	10	75
Gross Unrealized Losses	0	(24)
Estimated Fair Value	$ 7,178	$ 59,504