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Note 3 - Investment Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Securities HTM: |  |
Securities held to maturity, due in one year or less, amortized cost | $ 2,902 |
Securities held to maturity, due in one year or less, fair value | 2,895 |
Securities held to maturity, due after one year through five years, amortized cost | 18,998 |
Securities held to maturity, due after one year through five years, fair value | 19,359 |
Securities held to maturity, due after five years, amortized cost | 565,422 |
Securities held to maturity, due after five years, fair value | 513,382 |
Securities held to maturity, amortized cost | 587,322 |
Securities held to maturity, fair value | 535,636 | $ 522,297
Securities AFS: |  |
Securities available for sale, due in one year or less, amortized cost | 4,522 |
Securities available for sale, Due in one year or less, fair value | 4,510 |
Securities available for sale, due after one year through five years, amortized cost | 4,159 |
Securities available for sale, Due after one year through five years, fair value | 4,135 |
Securities available for sale, due after five years, amortized cost | 299,507 |
Securities available for sale, due after five years, fair value | 247,372 |
Securities available for sale, single maturity, amortized cost | 308,188 |
Securities available for sale, single maturity, fair value | 256,017 |
Securities AFS, Amortized Cost | 400,511 | 329,994
Available-for-sale Securities, Debt Securities, Total | 340,960 | 337,830
Securities available for sale, callable, amortized cost | 400,511 |
Securities available for sale, callable, fair value | 340,960 |
Callable Securities [Member] |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 283,015 |
Available-for-sale Securities, Debt Securities, Total | 233,630 |
Municipal securities. |  |
Securities HTM: |  |
Securities held to maturity, fair value | 534,586 | 521,248
Securities AFS: |  |
Securities AFS, Amortized Cost | 239,812 | 163,253
Available-for-sale Securities, Debt Securities, Total | 193,178 | 168,266
Municipal securities. | Callable Securities [Member] |  |
Securities HTM: |  |
Securities held to maturity, callable, amortized cost | 330,576 |
Securities held to maturity, callable, fair value | 296,851 |
Securities AFS: |  |
Securities available for sale, callable, amortized cost | 235,334 |
Securities available for sale, callable, fair value | 188,707 |
Asset-backed securities |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 18,885 | 26,372
Available-for-sale Securities, Debt Securities, Total | 18,728 | 27,124
Securities available for sale, callable, amortized cost | 18,885 |
Securities available for sale, callable, fair value | 18,728 |
Residential mortgage-backed and related securities |  |
Securities AFS: |  |
Securities AFS, Amortized Cost | 73,438 | 92,431
Available-for-sale Securities, Debt Securities, Total | 66,215 | 94,323
Securities available for sale, callable, amortized cost | 73,438 |
Securities available for sale, callable, fair value | 66,215 |
Other securities |  |
Securities HTM: |  |
Securities held to maturity, fair value | 1,050 | 1,049
Securities AFS: |  |
Securities AFS, Amortized Cost | 48,631 | 24,568
Available-for-sale Securities, Debt Securities, Total | 45,858 | $ 24,789
Other securities | Callable Securities [Member] |  |
Securities AFS: |  |
Securities available for sale, callable, amortized cost | 47,681 |
Securities available for sale, callable, fair value | $ 44,923 |

X
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