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Note 8 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Average Recorded Investment | $ 115,085 | $ 125,627
Interest Income Recognized | 947 | 1,078
Commercial Portfolio Segment [Member] |  |
Average Recorded Investment | 37,936 | 45,183
Interest Income Recognized | 256 | 334
Real Estate Construction Portfolio Segment [Member] |  |
Average Recorded Investment | 4,815 | 8,137
Interest Income Recognized |  |
Commercial Real Estate Portfolio Segment [Member] |  |
Average Recorded Investment | 59,070 | 58,598
Interest Income Recognized | 603 | 644
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Average Recorded Investment | 13,264 | 13,709
Interest Income Recognized | $ 88 | $ 100

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
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