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v3.25.1

Note 2 - Securities (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollars in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
March 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 583,732 |  |  | $ | 1,380 |  |  | $ | (37,703 | ) |  | $ | 547,409 |
Mortgage-backed securities |  |  | 30,848 |  |  |  | 8 |  |  |  | (5,674 | ) |  |  | 25,182 |
Municipal general obligation bonds |  |  | 192,160 |  |  |  | 483 |  |  |  | (7,853 | ) |  |  | 184,790 |
Municipal revenue bonds |  |  | 31,820 |  |  |  | 119 |  |  |  | (2,237 | ) |  |  | 29,702 |
Other investments |  |  | 500 |  |  |  | 0 |  |  |  | 0 |  |  |  | 500 |
|  | $ | 839,060 |  |  | $ | 1,990 |  |  | $ | (53,467 | ) |  | $ | 787,583 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 542,676 |  |  | $ | 131 |  |  | $ | (47,226 | ) |  | $ | 495,581 |
Mortgage-backed securities |  |  | 31,696 |  |  |  | 4 |  |  |  | (6,332 | ) |  |  | 25,368 |
Municipal general obligation bonds |  |  | 187,484 |  |  |  | 513 |  |  |  | (7,827 | ) |  |  | 180,170 |
Municipal revenue bonds |  |  | 31,066 |  |  |  | 89 |  |  |  | (2,422 | ) |  |  | 28,733 |
Other investments |  |  | 500 |  |  |  | 0 |  |  |  | 0 |  |  |  | 500 |
|  | $ | 793,422 |  |  | $ | 737 |  |  | $ | (63,807 | ) |  | $ | 730,352 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollars in thousands) |  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
March 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 76,302 |  |  | $ | 685 |  |  | $ | 361,528 |  |  | $ | 37,018 |  |  | $ | 437,830 |  |  | $ | 37,703 |
Mortgage-backed securities |  |  | 12 |  |  |  | 0 |  |  |  | 24,625 |  |  |  | 5,674 |  |  |  | 24,637 |  |  |  | 5,674 |
Municipal general obligation bonds |  |  | 52,177 |  |  |  | 1,486 |  |  |  | 101,963 |  |  |  | 6,367 |  |  |  | 154,140 |  |  |  | 7,853 |
Municipal revenue bonds |  |  | 2,369 |  |  |  | 21 |  |  |  | 20,967 |  |  |  | 2,216 |  |  |  | 23,336 |  |  |  | 2,237 |
Other investments |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 130,860 |  |  | $ | 2,192 |  |  | $ | 509,083 |  |  | $ | 51,275 |  |  | $ | 639,943 |  |  | $ | 53,467 |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollars in thousands) |  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 113,942 |  |  | $ | 2,379 |  |  | $ | 361,171 |  |  | $ | 44,847 |  |  | $ | 475,113 |  |  | $ | 47,226 |
Mortgage-backed securities |  |  | 194 |  |  |  | 1 |  |  |  | 24,865 |  |  |  | 6,331 |  |  |  | 25,059 |  |  |  | 6,332 |
Municipal general obligation bonds |  |  | 63,387 |  |  |  | 1,117 |  |  |  | 92,153 |  |  |  | 6,710 |  |  |  | 155,540 |  |  |  | 7,827 |
Municipal revenue bonds |  |  | 2,840 |  |  |  | 28 |  |  |  | 21,865 |  |  |  | 2,394 |  |  |  | 24,705 |  |  |  | 2,422 |
Other investments |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 180,363 |  |  | $ | 3,525 |  |  | $ | 500,054 |  |  | $ | 60,282 |  |  | $ | 680,417 |  |  | $ | 63,807 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |  | Fair |
(Dollars in thousands) |  | Cost |  |  | Value |
Due in 2025 |  | $ | 51,895 |  |  | $ | 51,218 |
Due in 2026 through 2030 |  |  | 456,080 |  |  |  | 432,090 |
Due in 2031 through 2035 |  |  | 253,116 |  |  |  | 232,846 |
Due in 2036 and beyond |  |  | 46,621 |  |  |  | 45,747 |
Mortgage-backed securities |  |  | 30,848 |  |  |  | 25,182 |
Other investments |  |  | 500 |  |  |  | 500 |
Total available for sale securities |  | $ | 839,060 |  |  | $ | 787,583 |

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