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Note 12 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Share Repurchase Program, Excise Tax | $ 0 |  | $ 352,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Deferred Tax Assets, Valuation Allowance | $ 0 |  | 0
Income Tax Expense (Benefit) | 9,939,000 | $ 2,297,000 |
Deferred Income Tax Liabilities, Net | 242,337,000 |  | 232,398,000
Texas Margin Tax [Member] |  |  |
Income Tax Expense (Benefit) | 0 | $ 223,000 |
Texas Margin Tax [Member] | State and Local Jurisdiction [Member] |  |  |
Deferred Income Tax Liabilities, Net | 9,000,000 |  | $ 8,600,000
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Income Tax Expense (Benefit) | 1,000,000 |  |
Deferred Tax Assets, Gross | $ 3,000,000 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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