Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 140,377	$ 123,839
Available-for-sale marketable securities, Unrealized Gain	249	73
Available-for-sale marketable securities, Unrealized (Loss)	(8,170)	(11,041)
Available-for-sale marketable securities, Fair Market Value	132,456	112,871
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	87,538	99,763
Marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	62,385	39,950
Available-for-sale marketable securities, Unrealized Gain	36	70
Available-for-sale marketable securities, Unrealized (Loss)	(267)	(408)
Available-for-sale marketable securities, Fair Market Value	62,154	39,612
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	34,844	30,713
Long-term marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	77,992	83,889
Available-for-sale marketable securities, Unrealized Gain	213	3
Available-for-sale marketable securities, Unrealized (Loss)	(7,903)	(10,633)
Available-for-sale marketable securities, Fair Market Value	70,302	73,259
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 52,694	$ 69,050