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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