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Note 4 - Securities (Tables) | 6 Months Ended
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Jun. 30, 2024
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | (Dollars in thousands) |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
June 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | 8,884 |  |  | $ | - |  |  | $ | (996 | ) |  | $ | 7,888 |
U.S. treasury securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 142,094 |  |  |  | - |  |  |  | (27,313 | ) |  |  | 114,781 |
Municipal securities |  |  | 263,866 |  |  |  | - |  |  |  | (48,321 | ) |  |  | 215,545 |
Collateralized debt obligations |  |  | 2,163 |  |  |  | - |  |  |  | (792 | ) |  |  | 1,371 |
Total securities available-for-sale |  | $ | 417,007 |  |  | $ | - |  |  | $ | (77,422 | ) |  | $ | 339,585 |
|  | (Dollars in thousands) |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
December 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | 8,884 |  |  | $ | - |  |  | $ | (1,001 | ) |  | $ | 7,883 |
U.S. treasury securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 149,410 |  |  |  | - |  |  |  | (25,946 | ) |  |  | 123,464 |
Municipal securities |  |  | 278,813 |  |  |  | 60 |  |  |  | (40,203 | ) |  |  | 238,670 |
Collateralized debt obligations |  |  | 2,170 |  |  |  | - |  |  |  | (813 | ) |  |  | 1,357 |
Total securities available-for-sale |  | $ | 439,277 |  |  | $ | 60 |  |  | $ | (67,963 | ) |  | $ | 371,374 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | (Dollars in thousands) |
|  | Available-for-sale |
|  |  |  |  |  | Estimated |
|  | Cost |  |  | Fair |
June 30, 2024 |  | Basis |  |  | Value |
Due in one year or less |  | $ | 250 |  |  | $ | 249 |
Due from one to five years |  |  | 10,309 |  |  |  | 9,151 |
Due from five to ten years |  |  | 21,812 |  |  |  | 19,283 |
Due over ten years |  |  | 242,542 |  |  |  | 196,121 |
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 142,094 |  |  |  | 114,781 |
Total |  | $ | 417,007 |  |  | $ | 339,585 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | (Dollars in thousands) |
|  | June 30, |  |  | June 30, |
|  | 2024 |  |  | 2023 |
Proceeds |  | $ | - |  |  | $ | 352 |
Gross gains |  |  | - |  |  |  | - |
Gross losses |  |  | - |  |  |  | (48 | )
|  | (Dollars in thousands) |
|  | June 30, |  |  | June 30, |
|  | 2024 |  |  | 2023 |
Proceeds |  | $ | 14,697 |  |  | $ | 352 |
Gross gains |  |  | - |  |  |  | - |
Gross losses |  |  | (531 | ) |  |  | (48 | )
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | (Dollars in thousands) |
|  | Unrealized loss |
Ending balance, March 31, 2023 |  | $ | (55,895 | )
Current period change |  |  | (4,290 | )
Ending balance, June 30, 2023 |  | $ | (60,185 | )
|  | (Dollars in thousands) |
|  | Unrealized loss |
Ending balance, March 31, 2024 |  | $ | (56,313 | )
Current period change |  |  | (2,626 | )
Ending balance, June 30, 2024 |  | $ | (58,939 | )
|  | (Dollars in thousands) |
|  | Unrealized gain/(loss) |
Ending balance, December 31, 2022 |  | $ | (64,300 | )
Current period change |  |  | 4,115 |
Ending balance, June 30, 2023 |  | $ | (60,185 | )
|  | (Dollars in thousands) |
|  | Unrealized loss |
Ending balance, December 31, 2023 |  | $ | (51,613 | )
Current period change |  |  | (7,326 | )
Ending balance, June 30, 2024 |  | $ | (58,939 | )
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | (Dollars in thousands) |  |  |  |  |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |  |  |  |  |
|  | Estimated |  |  |  |  |  |  | Estimated |  |  |  |  |  |  | Estimated |  |  |  |  |  |  | Percentage of |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Total Portfolio |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | in Loss Position |
June 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | - |  |  | $ | - |  |  | $ | 7,888 |  |  | $ | (996 | ) |  | $ | 7,888 |  |  | $ | (996 | ) |  |  | 100.0 | %
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | - |  |  |  | - |  |  |  | 114,781 |  |  |  | (27,313 | ) |  |  | 114,781 |  |  |  | (27,313 | ) |  |  | 100.0 | %
Municipal securities |  |  | - |  |  |  | - |  |  |  | 215,545 |  |  |  | (48,321 | ) |  |  | 215,545 |  |  |  | (48,321 | ) |  |  | 100.0 | %
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 1,371 |  |  |  | (792 | ) |  |  | 1,371 |  |  |  | (792 | ) |  |  | 100.0 | %
Total temporarily impaired |  | $ | - |  |  | $ | - |  |  | $ | 339,585 |  |  | $ | (77,422 | ) |  | $ | 339,585 |  |  | $ | (77,422 | ) |  |  | 100.0 | %
Number of securities |  |  |  |  |  |  | - |  |  |  |  |  |  |  | 418 |  |  |  |  |  |  |  | 418 |  |  |  |  |
|  | (Dollars in thousands) |  |  |  |  |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |  |  |  |  |
|  | Estimated |  |  |  |  |  |  | Estimated |  |  |  |  |  |  | Estimated |  |  |  |  |  |  | Percentage of |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Total Portfolio |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | in Loss Position |
December 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored entities |  | $ | - |  |  | $ | - |  |  | $ | 7,883 |  |  | $ | (1,001 | ) |  | $ | 7,883 |  |  | $ | (1,001 | ) |  |  | 100.0 | %
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | - |  |  |  | - |  |  |  | 123,464 |  |  |  | (25,946 | ) |  |  | 123,464 |  |  |  | (25,946 | ) |  |  | 100.0 | %
Municipal securities |  |  | - |  |  |  | - |  |  |  | 229,595 |  |  |  | (40,203 | ) |  |  | 229,595 |  |  |  | (40,203 | ) |  |  | 96.2 | %
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 1,357 |  |  |  | (813 | ) |  |  | 1,357 |  |  |  | (813 | ) |  |  | 100.0 | %
Total temporarily impaired |  | $ | - |  |  | $ | - |  |  | $ | 362,299 |  |  | $ | (67,963 | ) |  | $ | 362,299 |  |  | $ | (67,963 | ) |  |  | 97.6 | %
Number of securities |  |  |  |  |  |  | - |  |  |  |  |  |  |  | 434 |  |  |  |  |  |  |  | 434 |  |  |  |  |

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