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Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Fair value	$ 459,795	$ 485,135
Short-term, Non-governmental Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	246,070	245,886
Total short-term investments (available for sale), Gross Unrealized Gain	466	719
Total short-term investments (available for sale), Gross Unrealized (Loss)	(278)	(892)
Total short-term investments (available for sale), Fair value	246,258	245,713
Short-term, Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	213,394	239,859
Total short-term investments (available for sale), Gross Unrealized Gain	258	393
Total short-term investments (available for sale), Gross Unrealized (Loss)	(115)	(830)
Total short-term investments (available for sale), Fair value	213,537	239,422
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	459,464	485,745
Total short-term investments (available for sale), Gross Unrealized Gain	724	1,112
Total short-term investments (available for sale), Gross Unrealized (Loss)	(393)	(1,722)
Total short-term investments (available for sale), Fair value	$ 459,795	$ 485,135

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