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Note 7 - Fair Value Measurements and Fair Value of Financial Instruments - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Securities available-for-sale | $ 646,713 | $ 617,162
Fair Value, Recurring [Member] |  |
Securities available-for-sale | 646,713 | 617,162
Equity securities | 20,399 | 18,564
Derivatives - interest rate contracts | 29,501 | 43,805
Total assets | 696,613 | 679,531
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 159 | 165
Equity securities | 10,068 | 9,867
Derivatives - interest rate contracts | 0 | 0
Total assets | 10,227 | 10,032
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 639,552 | 609,875
Equity securities | 10,331 | 8,697
Derivatives - interest rate contracts | 29,501 | 43,805
Total assets | 679,384 | 662,377
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 7,002 | 7,122
Equity securities | 0 | 0
Derivatives - interest rate contracts | 0 | 0
Total assets | 7,002 | 7,122
US Government Agencies Debt Securities [Member] |  |
Securities available-for-sale | 90,810 | 45,326
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 90,810 | 45,326
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 90,810 | 45,326
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Residential Mortgage-Backed Securities [Member] |  |
Securities available-for-sale | 399,235 | 411,191
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 399,235 | 411,191
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 399,235 | 411,191
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] |  |
Securities available-for-sale | 22,285 | 21,564
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 22,285 | 21,564
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 22,285 | 21,564
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] |  |
Securities available-for-sale | 128,307 | 132,705
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 128,307 | 132,705
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 121,305 | 125,583
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 7,002 | 7,122
Corporate Debt Securities [Member] |  |
Securities available-for-sale | 5,011 | 4,973
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 5,011 | 4,973
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 5,011 | 4,973
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Asset-Backed Securities [Member] |  |
Securities available-for-sale | 906 | 1,238
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 906 | 1,238
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 906 | 1,238
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Other Debt Obligations [Member] |  |
Securities available-for-sale | 159 | 165
Other Debt Obligations [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 159 | 165
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 159 | 165
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 0 | 0
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | $ 0 | $ 0

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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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