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Note 2 - Securities (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
|  | December 31, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Equity securities |  | $ | 8,982 |  |  | $ | 305 |  |  | $ | (721 | ) |  | $ | 8,566 |
|  | 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 [Table Text Block] |
|  | December 31, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
Available for Sale: |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Government and federal agency |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
U.S. Treasury notes and bonds |  |  | 90,810 |  |  |  | - |  |  |  | (12,606 | ) |  |  | 78,204 |
State and municipal |  |  | 277,489 |  |  |  | - |  |  |  | (47,551 | ) |  |  | 229,938 |
Mortgage-backed |  |  | 236,703 |  |  |  | - |  |  |  | (28,140 | ) |  |  | 208,563 |
Corporate |  |  | 757 |  |  |  | - |  |  |  | (46 | ) |  |  | 711 |
Asset-backed securities |  |  | 13,031 |  |  |  | - |  |  |  | (698 | ) |  |  | 12,333 |
Total |  | $ | 618,790 |  |  | $ | - |  |  | $ | (89,041 | ) |  | $ | 529,749 |
|  | 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 |
Debt Securities, Held-to-Maturity [Table Text Block] |
|  | December 31, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
Held to Maturity: |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Government and federal agency |  | $ | 2,966 |  |  | $ | - |  |  | $ | (421 | ) |  | $ | 2,545 |
State and municipal |  |  | 201,890 |  |  |  | 1 |  |  |  | (39,355 | ) |  |  | 162,536 |
Mortgage-backed |  |  | 200,473 |  |  |  | - |  |  |  | (29,868 | ) |  |  | 170,605 |
Corporate |  |  | 19,603 |  |  |  | - |  |  |  | (2,285 | ) |  |  | 17,318 |
Asset-backed securities |  |  | 974 |  |  |  | - |  |  |  | (77 | ) |  |  | 897 |
Total |  | $ | 425,906 |  |  | $ | 1 |  |  | $ | (72,006 | ) |  | $ | 353,901 |
Schedule of Realized Gain (Loss) [Table Text Block] |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Proceeds from sales of securities |  | $ | 47,167 |  |  | $ | 29,742 |  |  | $ | 121,942 |
Gross realized gains |  |  | - |  |  |  | - |  |  |  | 1,308 |
Gross realized losses |  |  | (809 | ) |  |  | (40 | ) |  |  | - |
Investments Classified by Contractual Maturity Date [Table Text Block] |
(Dollars in thousands) |  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
Due within one year |  | $ | 6,035 |  |  | $ | 5,972 |
Due after one year through five years |  |  | 17,069 |  |  |  | 16,176 |
Due after five years through ten years |  |  | 149,578 |  |  |  | 130,215 |
Due after ten years |  |  | 209,405 |  |  |  | 168,823 |
Total debt securities |  |  | 382,087 |  |  |  | 321,186 |
Mortgage-backed securities |  |  | 236,703 |  |  |  | 208,563 |
Total |  | $ | 618,790 |  |  | $ | 529,749 |
(Dollars in thousands) |  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
Due within one year |  | $ | 2,417 |  |  | $ | 2,389 |
Due after one year through five years |  |  | 6,262 |  |  |  | 5,834 |
Due after five years through ten years |  |  | 109,263 |  |  |  | 92,553 |
Due after ten years |  |  | 107,491 |  |  |  | 82,520 |
Total debt securities |  |  | 225,433 |  |  |  | 183,296 |
Mortgage-backed securities |  |  | 200,473 |  |  |  | 170,605 |
Total |  | $ | 425,906 |  |  | $ | 353,901 |
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] |
(Dollars in thousands) |  | 2022 |  |  | 2021 |
Securities pledged for Community Reinvestment Act credits |  | $ | 250 |  |  | $ | 273 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
|  | 2022 |
|  | Less than 12 months |  |  | More than 12 months |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
Available for Sale: |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Government and federal agency |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
U.S. Treasury notes and bonds |  |  | - |  |  |  | - |  |  |  | 78,204 |  |  |  | 12,606 |  |  |  | 78,204 |  |  |  | 12,606 |
State and municipal |  |  | 89,158 |  |  |  | 12,612 |  |  |  | 140,390 |  |  |  | 34,939 |  |  |  | 229,548 |  |  |  | 47,551 |
Mortgage-backed |  |  | 63,249 |  |  |  | 3,093 |  |  |  | 144,318 |  |  |  | 25,047 |  |  |  | 207,567 |  |  |  | 28,140 |
Corporate |  |  | 711 |  |  |  | 46 |  |  |  | - |  |  |  | - |  |  |  | 711 |  |  |  | 46 |
Asset-backed securities |  |  | - |  |  |  | - |  |  |  | 12,333 |  |  |  | 698 |  |  |  | 12,333 |  |  |  | 698 |
Total temporarily impaired |  | $ | 153,118 |  |  | $ | 15,751 |  |  | $ | 375,245 |  |  | $ | 73,290 |  |  | $ | 528,363 |  |  | $ | 89,041 |
|  | 2021 |
|  | Less than 12 months |  |  | More than 12 months |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
Available for Sale: |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Government and federal agency |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
U.S. Treasury notes and bonds |  |  | 89,958 |  |  |  | 1,311 |  |  |  | - |  |  |  | - |  |  |  | 89,958 |  |  |  | 1,311 |
State and municipal |  |  | 130,001 |  |  |  | 3,253 |  |  |  | 15,237 |  |  |  | 856 |  |  |  | 145,238 |  |  |  | 4,109 |
Mortgage-backed |  |  | 261,560 |  |  |  | 5,709 |  |  |  | 86,974 |  |  |  | 3,340 |  |  |  | 348,534 |  |  |  | 9,049 |
Corporate |  |  | 17,369 |  |  |  | 233 |  |  |  | - |  |  |  | - |  |  |  | 17,369 |  |  |  | 233 |
Asset-backed securities |  |  | 16,294 |  |  |  | 93 |  |  |  | - |  |  |  | - |  |  |  | 16,294 |  |  |  | 93 |
Total temporarily impaired |  | $ | 515,182 |  |  | $ | 10,599 |  |  | $ | 102,211 |  |  | $ | 4,196 |  |  | $ | 617,393 |  |  | $ | 14,795 |
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value [Table Text Block] |
|  | 2022 |
|  | Less than 12 months |  |  | More than 12 months |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
Held to Maturity: |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Government and federal agency |  | $ | - |  |  | $ | - |  |  | $ | 2,545 |  |  | $ | 421 |  |  | $ | 2,545 |  |  | $ | 421 |
State and municipal |  |  | 13,457 |  |  |  | 1,899 |  |  |  | 149,016 |  |  |  | 37,456 |  |  |  | 162,473 |  |  |  | 39,355 |
Mortgage-backed |  |  | 25,582 |  |  |  | 822 |  |  |  | 145,024 |  |  |  | 29,046 |  |  |  | 170,606 |  |  |  | 29,868 |
Corporate |  |  | 5,296 |  |  |  | 603 |  |  |  | 10,771 |  |  |  | 1,682 |  |  |  | 16,067 |  |  |  | 2,285 |
Asset-backed securities |  |  | - |  |  |  | - |  |  |  | 897 |  |  |  | 77 |  |  |  | 897 |  |  |  | 77 |
Total temporarily impaired |  | $ | 44,335 |  |  | $ | 3,324 |  |  | $ | 308,253 |  |  | $ | 68,682 |  |  | $ | 352,588 |  |  | $ | 72,006 |
Gain (Loss) on Securities [Table Text Block] |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Net gains and losses recognized during the period |  | $ | (955 | ) |  | $ | 479 |  |  | $ | (155 | )
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 |  | $ | (955 | ) |  | $ | 479 |  |  | $ | (155 | )

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