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Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Deferred Tax Assets, Valuation Allowance | $ 0 | $ 0 |
Deferred Income Tax Liabilities, Net | 169,414 | 131,164 |
State and Local Jurisdiction [Member] | Texas Margin Tax [Member] |  |  |
Deferred Income Tax Liabilities, Net | $ 6,000 | $ 4,100 |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Deferred Tax Assets, Gross, Total |  |  | $ 3,400

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