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Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 120,498	$ 140,377
Available-for-sale marketable securities, Unrealized Gain	58	249
Available-for-sale marketable securities, Unrealized (Loss)	(9,888)	(8,170)
Available-for-sale marketable securities, Fair Market Value	110,668	132,456
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	78,320	87,538
Marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	38,718	62,385
Available-for-sale marketable securities, Unrealized Gain	0	36
Available-for-sale marketable securities, Unrealized (Loss)	(64)	(267)
Available-for-sale marketable securities, Fair Market Value	38,654	62,154
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	16,966	34,844
Long-term marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	81,780	77,992
Available-for-sale marketable securities, Unrealized Gain	58	213
Available-for-sale marketable securities, Unrealized (Loss)	(9,824)	(7,903)
Available-for-sale marketable securities, Fair Market Value	72,014	70,302
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 61,354	$ 52,694

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