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Note 11 - Supplemental Executive Retirement Plan (Details) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2014 | Feb. 28, 2013 Supplemental Executive Retirement and Death Benefit Agreements [Member] | Jun. 30, 2014 Supplemental Executive Retirement and Death Benefit Agreements [Member] | Jun. 30, 2014 Supplemental Executive Retirement and Death Benefit Agreements [Member] | Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Other Assets [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member] | Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member] | Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member] | Feb. 28, 2013 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]
Note 11 - Supplemental Executive Retirement Plan (Details) [Line Items] |  |  |  |  |  |  |  |
Time Period for Calculating Base Salary Under SERP Agreements |  | 5 years |  |  |  |  |  |
Retirement Age |  |  | 67 | 67 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years | 6 years |  |  |  |  |  |
Retirement Plan Monthly Installments |  | 180 |  |  |  |  |  |
Other Investments |  |  |  |  |  |  |  | $ 10,700,000
Investment Yield Adjustment |  |  |  |  |  | 99,000 |  |
Noninterest Income, Other |  |  |  |  |  | (72,000) | 31,000 |
Cash Surrender Value of Life Insurance |  |  |  |  | 11,200,000 |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost |  |  | $ 461,000 | $ 922,000 |  |  |  |

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