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Note 7 - Loans (Details) - Average Balance and Interest Income Recognized Related to Impaired Loans - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Financing Receivable, Impaired [Line Items] |  |
Loans, average recorded investment | $ 137,405 | $ 175,989
Loans, interest income recognized | 1,207 | 1,335
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Loans, average recorded investment | 12,670 | 25,426
Loans, interest income recognized | 120 | 229
Real Estate Construction Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Loans, average recorded investment | 20,292 | 22,990
Loans, interest income recognized | 65 | 65
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Loans, average recorded investment | 87,452 | 110,293
Loans, interest income recognized | 890 | 917
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Loans, average recorded investment | 16,991 | 17,280
Loans, interest income recognized | $ 132 | $ 124

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
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