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Note 2 - INVESTMENT SECURITIES - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Securities HTM: |  |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One | $ 1,857 |
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 1,850 |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five | 34,099 |
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 35,817 |
Securities held to maturity, due after five years, amortized cost | 759,743 |
Securities held to maturity, due after five years, fair value | 753,992 |
Securities HTM, Amortized cost | 795,699 | $ 683,707
Securities held to maturity, fair value | 791,659 | 680,279
Securities AFS: |  |
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One | 4,148 |
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 4,150 |
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 19,034 |
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 18,099 |
Securities available for sale, due after five years, amortized cost | 243,034 |
Securities available for sale, due after five years, fair value | 205,674 |
Securities available for sale, single maturity, amortized cost | 266,216 |
Securities available for sale, single maturity, fair value | 227,923 |
Securities AFS, Amortized Cost | 334,466 | 348,633
Available-for-sale Securities, Debt Securities, Total | 291,865 | 299,655
Callable Securities |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 244,205 |
Available-for-sale Securities, Debt Securities, Total | 207,920 |
Municipal securities |  |
Securities HTM: |  |
Securities HTM, Amortized cost | 794,649 | 682,657
Securities held to maturity, fair value | 790,610 | 679,201
Securities AFS: |  |
Securities AFS, Amortized Cost | 204,879 | 206,566
Available-for-sale Securities, Debt Securities, Total | 171,162 | 170,987
Municipal securities | Callable Securities |  |
Securities HTM: |  |
Securities held to maturity, callable, amortized cost | 298,861 |
Securities held to maturity, callable, fair value | 301,521 |
Securities AFS: |  |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost | 204,450 |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value | 170,745 |
Asset-backed securities |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 10,326 | 15,261
Available-for-sale Securities, Debt Securities, Total | 10,455 | 15,423
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost | 10,326 |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value | 10,455 |
Residential mortgage-backed and related securities |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 57,924 | 65,168
Available-for-sale Securities, Debt Securities, Total | 53,487 | 59,196
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost | 57,924 |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value | 53,487 |
Other securities |  |
Securities HTM: |  |
Securities HTM, Amortized cost | 1,050 | 1,050
Securities held to maturity, fair value | 1,049 | 1,078
Securities AFS: |  |
Securities AFS, Amortized Cost | 40,715 | 44,239
Available-for-sale Securities, Debt Securities, Total | 38,140 | $ 39,076
Other securities | Callable Securities |  |
Securities AFS: |  |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost | 39,755 |
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value | $ 37,175 |

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