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Note 2 - Securities (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
|  | June 30, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Equity securities |  | $ | 8,432 |  |  | $ | 405 |  |  | $ | (549 | ) |  | $ | 8,288 |
|  | December 31, 2021 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Equity securities |  | $ | 7,953 |  |  | $ | 665 |  |  | $ | (126 | ) |  | $ | 8,492 |
Debt Securities, Available-for-Sale and Held-to-Maturity [Table Text Block] |
|  | June 30, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
Available for Sale: |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Treasury notes and bonds |  | $ | 93,040 |  |  | $ | - |  |  | $ | (9,397 | ) |  | $ | 83,643 |
State and municipal |  |  | 300,824 |  |  |  | 34 |  |  |  | (44,197 | ) |  |  | 256,661 |
Mortgage-backed |  |  | 230,842 |  |  |  | 5 |  |  |  | (19,719 | ) |  |  | 211,128 |
Corporate |  |  | 1,256 |  |  |  | - |  |  |  | (18 | ) |  |  | 1,238 |
Asset-backed securities |  |  | 14,122 |  |  |  | - |  |  |  | (650 | ) |  |  | 13,472 |
Total |  | $ | 640,084 |  |  | $ | 39 |  |  | $ | (73,981 | ) |  | $ | 566,142 |
Held to Maturity: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government and federal agency |  | $ | 2,963 |  |  | $ | - |  |  | $ | (283 | ) |  | $ | 2,680 |
State and municipal |  |  | 203,267 |  |  |  | - |  |  |  | (32,638 | ) |  |  | 170,629 |
Mortgage-backed |  |  | 202,595 |  |  |  | - |  |  |  | (23,007 | ) |  |  | 179,588 |
Corporate |  |  | 19,593 |  |  |  | - |  |  |  | (1,013 | ) |  |  | 18,580 |
Asset-backed securities |  |  | 1,257 |  |  |  | - |  |  |  | (67 | ) |  |  | 1,190 |
Total |  | $ | 429,675 |  |  | $ | - |  |  | $ | (57,008 | ) |  | $ | 372,667 |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | December 31, 2021 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
Available for Sale: |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Government and federal agency |  | $ | 2,001 |  |  | $ | 7 |  |  | $ | - |  |  | $ | 2,008 |
U.S. Treasury notes and bonds |  |  | 93,267 |  |  |  | 23 |  |  |  | (1,311 | ) |  |  | 91,979 |
State and municipal |  |  | 528,252 |  |  |  | 10,704 |  |  |  | (4,109 | ) |  |  | 534,847 |
Mortgage-backed |  |  | 441,383 |  |  |  | 781 |  |  |  | (9,049 | ) |  |  | 433,115 |
Corporate |  |  | 20,856 |  |  |  | 19 |  |  |  | (233 | ) |  |  | 20,642 |
Asset-backed securities |  |  | 16,387 |  |  |  | - |  |  |  | (93 | ) |  |  | 16,294 |
Total |  | $ | 1,102,146 |  |  | $ | 11,534 |  |  | $ | (14,795 | ) |  | $ | 1,098,885 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Available for Sale Securities maturing within: |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Fair Value |
|  | Less than |  |  | 1 Year - |  |  | 5 Years - |  |  | More than |  |  | at June 30, |
(Dollars in thousands) |  | 1 Year |  |  | 5 Years |  |  | 10 Years |  |  | 10 Years |  |  | 2022 |
U.S. Treasury notes and bonds |  | $ | 2,000 |  |  | $ | - |  |  | $ | 81,643 |  |  | $ | - |  |  | $ | 83,643 |
State and municipal |  |  | 16,426 |  |  |  | 8,873 |  |  |  | 75,501 |  |  |  | 155,861 |  |  |  | 256,661 |
Corporate |  |  | 500 |  |  |  | 505 |  |  |  | 233 |  |  |  | - |  |  |  | 1,238 |
Asset-backed securities |  |  | - |  |  |  | 9,741 |  |  |  | 3,731 |  |  |  | - |  |  |  | 13,472 |
Total debt securities |  |  | 18,926 |  |  |  | 19,119 |  |  |  | 161,108 |  |  |  | 155,861 |  |  |  | 355,014 |
Mortgage-backed securities |  |  | 18,793 |  |  |  | 101,454 |  |  |  | 90,244 |  |  |  | 637 |  |  |  | 211,128 |
Total Available for Sale |  | $ | 37,719 |  |  | $ | 120,573 |  |  | $ | 251,352 |  |  | $ | 156,498 |  |  | $ | 566,142 |
|  | Held to Maturity Securities maturing within: |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Amortized Cost |
|  | Less than |  |  | 1 Year - |  |  | 5 Years - |  |  | More than |  |  | at June 30, |
(Dollars in thousands) |  | 1 Year |  |  | 5 Years |  |  | 10 Years |  |  | 10 Years |  |  | 2022 |
U.S. Government and federal agency |  | $ | - |  |  | $ | - |  |  | $ | 2,963 |  |  | $ | - |  |  | $ | 2,963 |
State and municipal |  |  | 2,724 |  |  |  | 5,112 |  |  |  | 89,248 |  |  |  | 106,183 |  |  |  | 203,267 |
Corporate |  |  | - |  |  |  | 250 |  |  |  | 18,343 |  |  |  | 1,000 |  |  |  | 19,593 |
Asset-backed securities |  |  | - |  |  |  | 1,257 |  |  |  | - |  |  |  | - |  |  |  | 1,257 |
Total debt securities |  |  | 2,724 |  |  |  | 6,619 |  |  |  | 110,554 |  |  |  | 107,183 |  |  |  | 227,080 |
Mortgage-backed securities |  |  | 6,525 |  |  |  | 45,672 |  |  |  | 150,398 |  |  |  | - |  |  |  | 202,595 |
Total Held to Maturity |  | $ | 9,249 |  |  | $ | 52,291 |  |  | $ | 260,952 |  |  | $ | 107,183 |  |  | $ | 429,675 |
Gain (Loss) on Securities [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Net gains and (losses) recognized during the period |  | $ | (327 | ) |  | $ | (119 | ) |  | $ | (683 | ) |  | $ | 489 |
Less: Net gains and (losses) recognized during the period on securities sold |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Unrealized gains and (losses) recognized during the reporting period on securities still held at the reporting date |  | $ | (327 | ) |  | $ | (119 | ) |  | $ | (683 | ) |  | $ | 489 |

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