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Note 8 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Average Recorded Investment | $ 92,102 | $ 118,905 | $ 86,167 | $ 117,006
Interest Income Recognized | 573 | 1,116 | 1,215 | 1,927
Commercial Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 33,695 | 46,792 | 30,913 | 42,388
Interest Income Recognized | 71 | 587 | 95 | 820
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 4,458 | 4,726 | 4,482 | 4,771
Interest Income Recognized | 49 | 0 | 147 | 0
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 36,225 | 54,404 | 36,225 | 56,724
Interest Income Recognized | 375 | 448 | 824 | 942
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 17,724 | 12,983 | 14,547 | 13,123
Interest Income Recognized | $ 78 | $ 81 | $ 149 | $ 165

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