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Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Short-term, Non-governmental Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	$ 297,963	$ 246,070
Total short-term investments (available for sale), Gross Unrealized Gain	1,071	466
Total short-term investments (available for sale), Gross Unrealized (Loss)	(59)	(278)
Total short-term investments (available for sale), Fair value	298,975	246,258
Short-term, Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	188,485	213,394
Total short-term investments (available for sale), Gross Unrealized Gain	444	258
Total short-term investments (available for sale), Gross Unrealized (Loss)	(61)	(115)
Total short-term investments (available for sale), Fair value	188,868	213,537
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	486,448	459,464
Total short-term investments (available for sale), Gross Unrealized Gain	1,515	724
Total short-term investments (available for sale), Gross Unrealized (Loss)	(120)	(393)
Total short-term investments (available for sale), Fair value	$ 487,843	$ 459,795

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