Financial Instruments - Summary of Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Short-term, Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	$ 3,005	$ 3,016
Total short-term investments (available for sale), Gross Unrealized (Loss)	(8)	(22)
Total short-term investments (available for sale), Fair value	2,997	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	216,958	222,575
Total short-term investments (available for sale), Gross Unrealized Gain	53	37
Total short-term investments (available for sale), Gross Unrealized (Loss)	(2,255)	(2,880)
Total short-term investments (available for sale), Fair value	214,756	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	205,023	179,068
Total short-term investments (available for sale), Gross Unrealized Gain	43	6
Total short-term investments (available for sale), Gross Unrealized (Loss)	(1,876)	(2,485)
Total short-term investments (available for sale), Fair value	203,190	176,589
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Total short-term investments (available for sale), Cost	424,986	404,659
Total short-term investments (available for sale), Gross Unrealized Gain	96	43
Total short-term investments (available for sale), Gross Unrealized (Loss)	(4,139)	(5,387)
Total short-term investments (available for sale), Fair value	$ 420,943	$ 399,315