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Note 4 - Investment Securities (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Allowance |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | for |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |  |  | Investment |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |  |  | Credit |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |  |  | Losses |
|  | (dollars in thousands) |
March 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 112,880 |  |  | $ | 571 |  |  | $ | (10,690 | ) |  | $ | 102,761 |  |  | $ | - |
Residential mortgage pass-through securities |  |  | 441,169 |  |  |  | 572 |  |  |  | (53,392 | ) |  |  | 388,349 |  |  |  | - |
Commercial mortgage pass-through securities |  |  | 24,925 |  |  |  | - |  |  |  | (3,874 | ) |  |  | 21,051 |  |  |  | - |
Obligations of U.S. states and political subdivisions |  |  | 139,759 |  |  |  | 14 |  |  |  | (21,116 | ) |  |  | 118,657 |  |  |  | - |
Corporate bonds and notes |  |  | 5,000 |  |  |  | 4 |  |  |  | - |  |  |  | 5,004 |  |  |  | - |
Asset-backed securities |  |  | 865 |  |  |  | 1 |  |  |  | (7 | ) |  |  | 859 |  |  |  | - |
Other securities |  |  | 125 |  |  |  | - |  |  |  | - |  |  |  | 125 |  |  |  | - |
Total investment securities available-for-sale |  | $ | 724,723 |  |  | $ | 1,162 |  |  | $ | (89,079 | ) |  | $ | 636,806 |  |  | $ | - |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 96,165 |  |  | $ | 179 |  |  | $ | (11,674 | ) |  | $ | 84,670 |  |  | $ | - |
Residential mortgage pass-through securities |  |  | 439,445 |  |  |  | 211 |  |  |  | (60,818 | ) |  |  | 378,838 |  |  |  | - |
Commercial mortgage pass-through securities |  |  | 24,989 |  |  |  | - |  |  |  | (4,097 | ) |  |  | 20,892 |  |  |  | - |
Obligations of U.S. states and political subdivisions |  |  | 141,775 |  |  |  | 89 |  |  |  | (19,460 | ) |  |  | 122,404 |  |  |  | - |
Corporate bonds and notes |  |  | 5,000 |  |  |  | 5 |  |  |  | (18 | ) |  |  | 4,987 |  |  |  | - |
Asset-backed securities |  |  | 892 |  |  |  | - |  |  |  | (7 | ) |  |  | 885 |  |  |  | - |
Other securities |  |  | 171 |  |  |  | - |  |  |  | - |  |  |  | 171 |  |  |  | - |
Total investment securities available-for-sale |  | $ | 708,437 |  |  | $ | 484 |  |  | $ | (96,074 | ) |  | $ | 612,847 |  |  | $ | - |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | March 31, 2025 |
|  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
|  | (dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 3,992 |  |  | $ | 3,996 |
Due after one year through five years |  |  | 5,258 |  |  |  | 5,254 |
Due after five years through ten years |  |  | 10,303 |  |  |  | 8,946 |
Due after ten years |  |  | 238,951 |  |  |  | 209,085 |
Residential mortgage pass-through securities |  |  | 441,169 |  |  |  | 388,349 |
Commercial mortgage pass-through securities |  |  | 24,925 |  |  |  | 21,051 |
Other securities |  |  | 125 |  |  |  | 125 |
Total investment securities available-for-sale |  | $ | 724,723 |  |  | $ | 636,806 |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | March 31, 2025 |
|  | Total |  |  | Less than 12 Months |  |  | 12 Months or Longer |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 56,703 |  |  | $ | (10,690 | ) |  | $ | 21,699 |  |  | $ | (72 | ) |  | $ | 35,004 |  |  | $ | (10,618 | )
Residential mortgage pass-through securities |  |  | 351,709 |  |  |  | (53,392 | ) |  |  | 13,622 |  |  |  | (297 | ) |  |  | 338,087 |  |  |  | (53,095 | )
Commercial mortgage pass-through securities |  |  | 21,051 |  |  |  | (3,874 | ) |  |  | - |  |  |  | - |  |  |  | 21,051 |  |  |  | (3,874 | )
Obligations of U.S. states and political subdivisions |  |  | 115,666 |  |  |  | (21,116 | ) |  |  | 19,440 |  |  |  | (750 | ) |  |  | 96,226 |  |  |  | (20,366 | )
Corporate bonds and notes |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |  |  |  | - |  |  |  | - |
Asset-backed securities |  |  | 591 |  |  |  | (7 | ) |  |  |  |  |  |  |  |  |  |  | 591 |  |  |  | (7 | )
Total investment securities available for sale |  | $ | 545,720 |  |  | $ | (89,079 | ) |  | $ | 54,761 |  |  | $ | (1,119 | ) |  | $ | 490,959 |  |  | $ | (87,960 | )
|  | December 31, 2024 |
|  | Total |  |  | Less than 12 Months |  |  | 12 Months or Longer |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 53,467 |  |  | $ | (11,674 | ) |  | $ | 18,471 |  |  | $ | (60 | ) |  | $ | 34,996 |  |  | $ | (11,614 | )
Residential mortgage pass-through securities |  |  | 364,971 |  |  |  | (60,818 | ) |  |  | 26,809 |  |  |  | (604 | ) |  |  | 338,162 |  |  |  | (60,214 | )
Commercial mortgage pass-through securities |  |  | 20,892 |  |  |  | (4,097 | ) |  |  | - |  |  |  | - |  |  |  | 20,892 |  |  |  | (4,097 | )
Obligations of U.S. states and political subdivisions |  |  | 112,523 |  |  |  | (19,460 | ) |  |  | 13,281 |  |  |  | (322 | ) |  |  | 99,242 |  |  |  | (19,138 | )
Corporate bonds and notes |  |  | 1,982 |  |  |  | (18 | ) |  |  | 1,982 |  |  |  | (18 | ) |  |  | - |  |  |  | - |
Asset-backed securities |  |  | 885 |  |  |  | (7 | ) |  |  | - |  |  |  | - |  |  |  | 885 |  |  |  | (7 | )
Total investment securities available for sale |  | $ | 554,720 |  |  | $ | (96,074 | ) |  | $ | 60,543 |  |  | $ | (1,004 | ) |  | $ | 494,177 |  |  | $ | (95,070 | )

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