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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, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Average Recorded Investment | $ 118,905 | $ 133,809 | $ 117,006 | $ 129,741
Interest Income Recognized | 1,116 | 1,224 | 1,927 | 2,275
Commercial Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 46,792 | 46,763 | 42,388 | 45,978
Interest Income Recognized | 587 | 498 | 820 | 825
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 4,726 | 8,378 | 4,771 | 8,258
Interest Income Recognized | 0 | 0 | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 54,404 | 64,004 | 56,724 | 61,316
Interest Income Recognized | 448 | 633 | 942 | 1,264
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Average Recorded Investment | 12,983 | 14,664 | 13,123 | 14,189
Interest Income Recognized | $ 81 | $ 93 | $ 165 | $ 186

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