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Note 9 - Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  |  | Community Banking |  |  | Insurance Services |  |  | Total |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Balance January 1, 2016 |  | $ | 91,455 |  |  | $ | 9,031 |  |  | $ | 100,486 |
Acquisitions and dispositions, net |  |  | 1,290 |  |  |  | (5,997 | ) |  |  | (4,707 | )
Other (1) |  |  | 3,034 |  |  |  | (3,034 | ) |  |  | - |
Balance December 31, 2016 |  | $ | 95,779 |  |  | $ | - |  |  | $ | 95,779 |
Balance January 1, 2017 |  | $ | 95,779 |  |  |  |  |  |  | $ | 95,779 |
Acquisitions and dispositions, net |  |  | - |  |  |  |  |  |  |  | - |
Balance December 31, 2017 |  | $ | 95,779 |  |  |  |  |  |  | $ | 95,779 |
Balance January 1, 2018 |  | $ | 95,779 |  |  |  |  |  |  | $ | 95,779 |
Acquisitions and dispositions, net |  |  | (1,543 | ) |  |  |  |  |  |  | (1,543 | )
Impairment charges |  |  | (1,492 | ) |  |  |  |  |  |  | (1,492 | )
Balance December 31, 2018 |  | $ | 92,744 |  |  |  |  |  |  | $ | 92,744 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangibles |  | $ | 8,184 |  |  | $ | 8,184 |  |  | $ | 11,536 |
Accumulated amortization |  |  | (3,158 | ) |  |  | (2,161 | ) |  |  | (4,515 | )
Core deposit intangibles, net |  |  | 5,026 |  |  |  | 6,023 |  |  |  | 7,021 |
Other identifiable intangibles |  |  | 535 |  |  |  | 879 |  |  |  | 3,508 |
Accumulated amortization |  |  | (535 | ) |  |  | (751 | ) |  |  | (3,322 | )
Other identifiable intangibles, net |  |  | - |  |  |  | 128 |  |  |  | 186 |
Total other intangible assets, net |  | $ | 5,026 |  |  | $ | 6,151 |  |  | $ | 7,207 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
(Amounts in thousands) |  |  |  |
2019 |  | $ | 997 |
2020 |  |  | 997 |
2021 |  |  | 997 |
2022 |  |  | 997 |
2023 |  |  | 431 |
2024 and thereafter |  |  | 607 |
Total estimated amortization expense |  | $ | 5,026 |

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