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Note 6 - Goodwill and Intangibles - Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |  |
Goodwill | $ 74,066 | $ 74,748 | $ 77,832 | $ 28,334
Other Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill |  | 682 | 3,766 |
Commercial Banking | QCBT |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill | 3,223 | 3,223 | 3,223 |
Commercial Banking | CRBT |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill | 14,980 | 14,980 | 14,980 |
Commercial Banking | CSB |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill | 9,888 | 9,888 | 9,888 |
Commercial Banking | SFCB |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill | $ 45,975 | $ 45,975 | $ 45,975 |

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