Marketable Securities - Summary of Contractual Maturities of Available-for-sale Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Marketable Securities [Line Items]
Amortized Cost	$ 1,129,098	$ 1,107,854
Fair Value	1,127,743	$ 1,110,207
Due within one year [Member]
Marketable Securities [Line Items]
Amortized Cost	580,387
Fair Value	580,435
Due after one year through three years [Member]
Marketable Securities [Line Items]
Amortized Cost	548,711
Fair Value	$ 547,308