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Note 12 - Federal and State Income Taxes - Significant Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax liabilities: |  |
Property and equipment | $ 101,623 | $ 102,169
Unrealized gains on securities | 3,282 | 2,894
Prepaid expenses and other | 3,303 | 3,836
Total deferred tax liabilities | 108,208 | 108,899
Deferred tax assets: |  |
Current expected credit losses | 1,986 | 1,385
Compensated absences | 168 | 215
Self-insurance allowances | 1,674 | 5,746
Other | 49 | 108
Total deferred tax assets | 3,877 | 7,454
Net deferred tax liability | $ 104,331 | $ 101,445

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