Note 10 - Income Taxes - Components of Income Tax (Benefit) Expense Recorded Directly to Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrealized gain (loss) on securities available for sale	$ 7,416	$ (35,323)	$ (5,371)
Unrealized gain (loss) on derivatives	(58)	0	38
Minimum pension liability adjustment	(17)	126	52
Total income tax (benefit) expense recorded directly to stockholders' equity	$ 7,341	$ (35,197)	$ (5,281)

The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

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Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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