Note 13 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income tax expense at U.S. federal statutory rate	$ 8,709	$ 21,343	$ 22,309	$ 17,810
State deferred income taxes	523	848	1,110	724
Limited tax benefit due to stock-based compensation	451	1,930	740	5,536
Other, net	(39)	(49)	(8)	(310)
Total income tax expense	$ 9,644	$ 24,072	$ 24,151	$ 23,760
Effective income tax rate	23.30%	23.70%	22.70%	28.00%

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

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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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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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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