Note 12 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Computed "expected" income tax expense	$ 15,170	$ 29,986	$ 16,643
State income taxes, net of federal income tax effect	1,674	4,711	3,787
Per diem allowances	862	0	0
Tax contingency accruals	(287)	(230)	(295)
Valuation allowance, net	0	0	(242)
Tax credits	(329)	(379)	(295)
Excess tax benefits on share-based compensation	(1,811)	(446)	(259)
Change in prior year estimates	8	(145)	(86)
Executive compensation disallowance	2,370	1,778	1,705
Other, net	(46)	(415)	4
Income tax expense	$ 17,611	$ 34,860	$ 20,962

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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