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Investments in Marketable Securities - Summary of Investments Classified As Available-For-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 768,610	$ 306,661
Gross Unrealized Gains	46	156
Gross Unrealized Losses	(1,259)	(254)
Aggregate Estimated Fair Value	767,397	306,563
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,042	24,226
Aggregate Estimated Fair Value	16,042	24,226
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	510,004	168,564
Gross Unrealized Gains	46	148
Gross Unrealized Losses	(914)	(128)
Aggregate Estimated Fair Value	509,136	168,584
Government debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	242,564	113,871
Gross Unrealized Gains		8
Gross Unrealized Losses	(345)	(126)
Aggregate Estimated Fair Value	$ 242,219	$ 113,753

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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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