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v3.23.1

Note 2 - Securities (Tables) | 3 Months Ended
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Mar. 31, 2023
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
March 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 454,000,000 |  |  | $ | 0 |  |  | $ | (57,780,000 | ) |  | $ | 396,220,000 |
Mortgage-backed securities |  |  | 37,164,000 |  |  |  | 22,000 |  |  |  | (5,596,000 | ) |  |  | 31,590,000 |
Municipal general obligation bonds |  |  | 168,721,000 |  |  |  | 1,081,000 |  |  |  | (6,731,000 | ) |  |  | 163,071,000 |
Municipal revenue bonds |  |  | 30,812,000 |  |  |  | 200,000 |  |  |  | (2,420,000 | ) |  |  | 28,592,000 |
Other investments |  |  | 500,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 500,000 |
|  | $ | 691,197,000 |  |  | $ | 1,303,000 |  |  | $ | (72,527,000 | ) |  | $ | 619,973,000 |
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 |
March 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 14,000,000 |  |  | $ | 755,000 |  |  | $ | 382,220,000 |  |  | $ | 57,025,000 |  |  | $ | 396,220,000 |  |  | $ | 57,780,000 |
Mortgage-backed securities |  |  | 29,016,000 |  |  |  | 5,508,000 |  |  |  | 1,742,000 |  |  |  | 88,000 |  |  |  | 30,758,000 |  |  |  | 5,596,000 |
Municipal general obligation bonds |  |  | 43,446,000 |  |  |  | 940,000 |  |  |  | 67,822,000 |  |  |  | 5,791,000 |  |  |  | 111,268,000 |  |  |  | 6,731,000 |
Municipal revenue bonds |  |  | 5,404,000 |  |  |  | 401,000 |  |  |  | 16,407,000 |  |  |  | 2,019,000 |  |  |  | 21,811,000 |  |  |  | 2,420,000 |
|  | $ | 91,866,000 |  |  | $ | 7,604,000 |  |  | $ | 468,191,000 |  |  | $ | 64,923,000 |  |  | $ | 560,057,000 |  |  | $ | 72,527,000 |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized 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 |  |  | 0.98 |  |  | $ | 20,361,000 |  |  | $ | 19,997,000 |
Due in 2024 through 2028 |  |  | 1.32 |  |  |  | 319,037,000 |  |  |  | 293,271,000 |
Due in 2029 through 2033 |  |  | 2.03 |  |  |  | 278,488,000 |  |  |  | 241,115,000 |
Due in 2034 and beyond |  |  | 3.58 |  |  |  | 35,647,000 |  |  |  | 33,500,000 |
Mortgage-backed securities |  |  | 2.12 |  |  |  | 37,164,000 |  |  |  | 31,590,000 |
Other investments |  |  | 8.00 |  |  |  | 500,000 |  |  |  | 500,000 |
Total available for sale securities |  |  | 1.76 |  |  | $ | 691,197,000 |  |  | $ | 619,973,000 |

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