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Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings - Non Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | $ 39,923 | $ 41,618
Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 12,946 | 18,366
Rate Reduction and Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 26,977 | 22,392
Rate Reduction [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs |  | 860
Commercial Portfolio Segment [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,123 | 3,552
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,033 | 1,423
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 90 | 1,269
Commercial Portfolio Segment [Member] | Rate Reduction [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs |  | 860
Real Estate Construction Portfolio Segment [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 15,806 | 19,462
Real Estate Construction Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 9,981 |
Real Estate Construction Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 5,825 | 19,462
Commercial Real Estate Portfolio Segment [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 21,906 | 16,890
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,544 | 15,917
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 20,362 | 973
Residential Portfolio Segment [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,088 | 1,714
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 388 | 1,026
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | $ 700 | $ 688

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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