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Note 8 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Impaired Loans Average Recorded Investment | $ 123,851 | $ 127,259 | $ 127,756 | $ 127,722
Impaired Loans Interest Income Recognized | 1,145 | 1,264 | 3,188 | 2,349
Commercial Portfolio Segment [Member] |  |  |  |
Impaired Loans Average Recorded Investment | 48,772 | 24,987 | 46,920 | 22,572
Impaired Loans Interest Income Recognized | 461 | 678 | 1,152 | 760
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Impaired Loans Average Recorded Investment | 5,980 | 29,780 | 7,490 | 29,868
Impaired Loans Interest Income Recognized |  | 99 |  | 287
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Impaired Loans Average Recorded Investment | 55,375 | 58,555 | 59,314 | 60,074
Impaired Loans Interest Income Recognized | 576 | 391 | 1,757 | 1,015
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Impaired Loans Average Recorded Investment | 13,724 | 13,937 | 14,032 | 15,208
Impaired Loans Interest Income Recognized | $ 108 | $ 96 | $ 279 | $ 287

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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=84173941&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=84173941&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=84173941&loc=d3e5212-111524 + Details
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