Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Short-term, Non-governmental Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	$ 240,241	$ 245,886
Total short-term investments (available for sale), Gross Unrealized Gain	227	719
Total short-term investments (available for sale), Gross Unrealized (Loss)	(887)	(892)
Total short-term investments (available for sale), Fair value	239,581	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	276,887	239,859
Total short-term investments (available for sale), Gross Unrealized Gain	79	393
Total short-term investments (available for sale), Gross Unrealized (Loss)	(945)	(830)
Total short-term investments (available for sale), Fair value	276,021	239,422
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	517,128	485,745
Total short-term investments (available for sale), Gross Unrealized Gain	306	1,112
Total short-term investments (available for sale), Gross Unrealized (Loss)	(1,832)	(1,722)
Total short-term investments (available for sale), Fair value	$ 515,602	$ 485,135