Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 122,885	$ 140,377
Available-for-sale marketable securities, Unrealized Gain	109	249
Available-for-sale marketable securities, Unrealized (Loss)	(9,018)	(8,170)
Available-for-sale marketable securities, Fair Market Value	113,976	132,456
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	77,541	87,538
Marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	41,308	62,385
Available-for-sale marketable securities, Unrealized Gain	19	36
Available-for-sale marketable securities, Unrealized (Loss)	(27)	(267)
Available-for-sale marketable securities, Fair Market Value	41,300	62,154
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	17,657	34,844
Long-term marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	81,577	77,992
Available-for-sale marketable securities, Unrealized Gain	90	213
Available-for-sale marketable securities, Unrealized (Loss)	(8,991)	(7,903)
Available-for-sale marketable securities, Fair Market Value	72,676	70,302
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 59,884	$ 52,694