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Note 12 - Fair Values - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-Sale | $ 855,138 | $ 730,352
Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
US Government Agencies Debt Securities [Member] |  |
Debt Securities, Available-for-Sale | 606,782 | 495,581
Collateralized Mortgage-Backed Securities [Member] |  |
Debt Securities, Available-for-Sale | 23,673 | 25,368
Municipal General Obligation Bonds [Member] |  |
Debt Securities, Available-for-Sale | 192,575 | 180,170
Municipal Revenue Bonds [Member] |  |
Debt Securities, Available-for-Sale | 31,608 | 28,733
Other Debt and Equity Securities [Member] |  |
Debt Securities, Available-for-Sale | 500 | 500
Fair Value, Recurring [Member] |  |
Total assets | 880,241 | 757,145
Total liabilities | 25,515 | 27,050
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total assets | 0 | 0
Total liabilities | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total assets | 879,863 | 756,752
Total liabilities | 25,515 | 27,050
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total assets | 378 | 393
Total liabilities | 0 | 0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] |  |
Debt Securities, Available-for-Sale | 606,782 | 495,581
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Debt Securities, Available-for-Sale | 606,782 | 495,581
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
Debt Securities, Available-for-Sale | 23,673 | 25,368
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Debt Securities, Available-for-Sale | 23,673 | 25,368
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] |  |
Debt Securities, Available-for-Sale | 192,575 | 180,170
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Debt Securities, Available-for-Sale | 192,197 | 179,777
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 378 | 393
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] |  |
Debt Securities, Available-for-Sale | 31,608 | 28,733
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Debt Securities, Available-for-Sale | 31,608 | 28,733
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] |  |
Debt Securities, Available-for-Sale | 500 | 500
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Debt Securities, Available-for-Sale | 500 | 500
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Interest rate swaps | 25,103 | 26,793
Interest rate swaps | 25,515 | 27,050
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Interest rate swaps | 0 | 0
Interest rate swaps | 0 | 0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Interest rate swaps | 25,103 | 26,793
Interest rate swaps | 25,515 | 27,050
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Interest rate swaps | 0 | 0
Interest rate swaps | $ 0 | $ 0

X
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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