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v3.23.3

Note 2 - Securities (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 452,330,000 |  |  | $ | 0 |  |  | $ | (68,251,000 | ) |  | $ | 384,079,000 |
Mortgage-backed securities |  |  | 35,699,000 |  |  |  | 2,000 |  |  |  | (7,685,000 | ) |  |  | 28,016,000 |
Municipal general obligation bonds |  |  | 166,922,000 |  |  |  | 33,000 |  |  |  | (13,530,000 | ) |  |  | 153,425,000 |
Municipal revenue bonds |  |  | 30,004,000 |  |  |  | 14,000 |  |  |  | (3,733,000 | ) |  |  | 26,285,000 |
Other investments |  |  | 500,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 500,000 |
|  | $ | 685,455,000 |  |  | $ | 49,000 |  |  | $ | (93,199,000 | ) |  | $ | 592,305,000 |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 453,836,000 |  |  | $ | 0 |  |  | $ | (65,092,000 | ) |  | $ | 388,744,000 |
Mortgage-backed securities |  |  | 38,002,000 |  |  |  | 19,000 |  |  |  | (6,068,000 | ) |  |  | 31,953,000 |
Municipal general obligation bonds |  |  | 163,041,000 |  |  |  | 450,000 |  |  |  | (9,058,000 | ) |  |  | 154,433,000 |
Municipal revenue bonds |  |  | 30,267,000 |  |  |  | 102,000 |  |  |  | (3,063,000 | ) |  |  | 27,306,000 |
Other investments |  |  | 500,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 500,000 |
|  | $ | 685,646,000 |  |  | $ | 571,000 |  |  | $ | (83,281,000 | ) |  | $ | 602,936,000 |
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 |
|  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 2,679,000 |  |  | $ | 1,124,000 |  |  | $ | 381,400,000 |  |  | $ | 67,127,000 |  |  | $ | 384,079,000 |  |  | $ | 68,251,000 |
Mortgage-backed securities |  |  | 26,231,000 |  |  |  | 7,558,000 |  |  |  | 1,604,000 |  |  |  | 127,000 |  |  |  | 27,835,000 |  |  |  | 7,685,000 |
Municipal general obligation bonds |  |  | 33,136,000 |  |  |  | 2,992,000 |  |  |  | 115,872,000 |  |  |  | 10,538,000 |  |  |  | 149,008,000 |  |  |  | 13,530,000 |
Municipal revenue bonds |  |  | 6,710,000 |  |  |  | 1,043,000 |  |  |  | 18,066,000 |  |  |  | 2,690,000 |  |  |  | 24,776,000 |  |  |  | 3,733,000 |
|  | $ | 68,756,000 |  |  | $ | 12,717,000 |  |  | $ | 516,942,000 |  |  | $ | 80,482,000 |  |  | $ | 585,698,000 |  |  | $ | 93,199,000 |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 53,019,000 |  |  | $ | 5,713,000 |  |  | $ | 335,725,000 |  |  | $ | 59,379,000 |  |  | $ | 388,744,000 |  |  | $ | 65,092,000 |
Mortgage-backed securities |  |  | 31,127,000 |  |  |  | 6,068,000 |  |  |  | 12,000 |  |  |  | 0 |  |  |  | 31,139,000 |  |  |  | 6,068,000 |
Municipal general obligation bonds |  |  | 97,252,000 |  |  |  | 4,516,000 |  |  |  | 32,870,000 |  |  |  | 4,542,000 |  |  |  | 130,122,000 |  |  |  | 9,058,000 |
Municipal revenue bonds |  |  | 12,532,000 |  |  |  | 1,141,000 |  |  |  | 10,609,000 |  |  |  | 1,922,000 |  |  |  | 23,141,000 |  |  |  | 3,063,000 |
|  | $ | 193,930,000 |  |  | $ | 17,438,000 |  |  | $ | 379,216,000 |  |  | $ | 65,843,000 |  |  | $ | 573,146,000 |  |  | $ | 83,281,000 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Weighted |  |  |  |  |  |  |  |  |
|  | Average |  |  | Amortized |  |  | Fair |
|  | Yield |  |  | Cost |  |  | Value |
Due in 2023 |  | 0.35 | % |  | $ | 10,635,000 |  |  | $ | 10,560,000 |
Due in 2024 through 2028 |  | 1.32 |  |  |  | 319,456,000 |  |  |  | 289,600,000 |
Due in 2029 through 2033 |  | 2.02 |  |  |  | 278,377,000 |  |  |  | 227,860,000 |
Due in 2034 and beyond |  | 3.68 |  |  |  | 40,788,000 |  |  |  | 35,769,000 |
Mortgage-backed securities |  | 2.18 |  |  |  | 35,699,000 |  |  |  | 28,016,000 |
Other investments |  | 8.42 |  |  |  | 500,000 |  |  |  | 500,000 |
Total available for sale securities |  | 1.78 | % |  | $ | 685,455,000 |  |  | $ | 592,305,000 |

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