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Note 9 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Average Recorded Investment | $ 69,577 | $ 77,699
Interest Income Recognized | 235 | 436
Commercial Portfolio Segment [Member] |  |
Average Recorded Investment | 23,395 | 27,351
Interest Income Recognized | 4 | 0
Commercial Real Estate Portfolio Segment [Member] |  |
Average Recorded Investment | 36,214 | 37,909
Interest Income Recognized | 231 | 429
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Average Recorded Investment | 9,965 | 12,439
Interest Income Recognized | 0 | $ 7
Installment and Other Loans [Member ] |  |
Average Recorded Investment | 3 |
Interest Income Recognized | $ 0 |

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-15 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-17 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-15 + Details
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