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Note 12 - Supplemental Executive Retirement Plan (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2013 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2014 USD ($)
Note 12 - Supplemental Executive Retirement Plan (Details) [Line Items] |  |  |  |
Cash Surrender Value of Life Insurance |  | $ 12,137 | $ 12,137 | $ 11,277
Supplemental Executive Retirement and Death Benefit Agreements [Member] |  |  |  |
Note 12 - Supplemental Executive Retirement Plan (Details) [Line Items] |  |  |  |
Time Period for Calculating Base Salary Under SERP Agreements | 5 years |  |  |
Retirement Age | 67 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 6 years |  |  |
Retirement Plan, Monthly Installments | 180 |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost |  | 255 | 764 |
Purchased Fixed Annuity for Financing Retirement Benefits [Member] | Supplemental Executive Retirement and Death Benefit Agreements [Member] |  |  |  |
Note 12 - Supplemental Executive Retirement Plan (Details) [Line Items] |  |  |  |
Other Investments | $ 11,400 |  |  |
Purchased Fixed Annuity for Financing Retirement Benefits [Member] | Supplemental Executive Retirement and Death Benefit Agreements [Member] | Other Assets [Member] |  |  |  |
Note 12 - Supplemental Executive Retirement Plan (Details) [Line Items] |  |  |  |
Cash Surrender Value of Life Insurance |  | $ 12,100 | $ 12,100 |

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