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Note 16 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-Sale | $ 617,092 | $ 602,936
Fair Value, Inputs, Level 1 [Member] |  |
Debt Securities, Available-for-Sale | 0 | 0
US Government Agencies Debt Securities [Member] |  |
Debt Securities, Available-for-Sale | 390,496 | 388,744
Collateralized Mortgage-Backed Securities [Member] |  |
Debt Securities, Available-for-Sale | 29,473 | 31,953
Municipal General Obligation Bonds [Member] |  |
Debt Securities, Available-for-Sale | 167,860 | 154,433
Municipal Revenue Bonds [Member] |  |
Debt Securities, Available-for-Sale | 28,763 | 27,306
Other Debt and Equity Securities [Member] |  |
Debt Securities, Available-for-Sale | 500 | 500
Fair Value, Recurring [Member] |  |
Total assets | 644,597 | 629,109
Total liabilities | 27,964 | 26,377
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 | 644,084 | 628,531
Total liabilities | 27,964 | 26,377
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total assets | 513 | 578
Total liabilities | 0 | 0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] |  |
Debt Securities, Available-for-Sale | 390,496 | 388,744
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 | 390,496 | 388,744
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 | 29,473 | 31,953
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 | 29,473 | 31,953
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 | 167,860 | 154,433
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 | 167,347 | 153,855
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Debt Securities, Available-for-Sale | 513 | 578
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] |  |
Debt Securities, Available-for-Sale | 28,763 | 27,306
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 | 28,763 | 27,306
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] |  |
Derivative Asset | 27,505 | 26,173
Derivative Liability | 27,964 | 26,377
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Derivative Asset | 0 | 0
Derivative Liability | 0 | 0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Derivative Asset | 27,505 | 26,173
Derivative Liability | 27,964 | 26,377
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Derivative Asset | 0 | 0
Derivative Liability | $ 0 | $ 0

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