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Note 6 - Securities (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Note 6 - Securities (Details) [Line Items]          
Available-for-sale Securities Pledged as Collateral $ 363,533,000   $ 363,533,000   $ 369,945,000
Available-for-sale Securities, Gross Realized Gains 932,000 $ 140,000 1,006,000 $ 342,000  
Equity Securities [Member]          
Note 6 - Securities (Details) [Line Items]          
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 10,000   10,000    
Available-for-sale Securities, Gross Realized Gains 476,000 $ 74,000 476,000 $ 74,000  
Federal Home Loan Bank of Pittsburgh [Member] | Other Assets [Member]          
Note 6 - Securities (Details) [Line Items]          
Federal Home Loan Bank Stock $ 2,372,000   $ 2,372,000   $ 1,454,000