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Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings - Non Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
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Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | $ 23,209 | $ 39,923
Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 2,914 | 12,946
Rate Reduction and Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 20,295 | 26,977
Commercial Portfolio Segment [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,091 | 1,123
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,001 | 1,033
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 90 | 90
Real Estate Construction Portfolio Segment [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 21,560 | 15,806
Real Estate Construction Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 1,532 | 9,981
Real Estate Construction Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 20,028 | 5,825
Residential Portfolio Segment [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 558 | 1,088
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | 381 | 388
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs | $ 177 | 700
Commercial Real Estate Portfolio Segment [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs |  | 21,906
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs |  | 1,544
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items] |  |
Non-accrual TDRs |  | $ 20,362

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