Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Fair value	$ 485,135	$ 399,315
Short-term, Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost		3,016
Total short-term investments (available for sale), Gross Unrealized (Loss)		(22)
Total short-term investments (available for sale), Fair value		2,994
Short-term, Non-governmental Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	245,886	222,575
Total short-term investments (available for sale), Gross Unrealized Gain	719	37
Total short-term investments (available for sale), Gross Unrealized (Loss)	(892)	(2,880)
Total short-term investments (available for sale), Fair value	245,713	219,732
Short-term, Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	239,859	179,068
Total short-term investments (available for sale), Gross Unrealized Gain	393	6
Total short-term investments (available for sale), Gross Unrealized (Loss)	(830)	(2,485)
Total short-term investments (available for sale), Fair value	239,422	176,589
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	485,745	404,659
Total short-term investments (available for sale), Gross Unrealized Gain	1,112	43
Total short-term investments (available for sale), Gross Unrealized (Loss)	(1,722)	(5,387)
Total short-term investments (available for sale), Fair value	$ 485,135	$ 399,315