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Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value $ 5,411 $ 59,255
Less than Twelve Months, Gross Unrealized Losses (25) (4,608)
Twelve Months or Greater, Fair Value 54,488 15,092
Twelve Months or Greater, Gross Unrealized Losses (2,242) (1,386)
Total, Fair Value 59,899 74,347
Total, Gross Unrealized Losses (2,267) (5,994)
US Government Agencies Debt Securities [Member]
    
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value   13,130
Less than Twelve Months, Gross Unrealized Losses   (929)
Twelve Months or Greater, Fair Value 15,636 7,166
Twelve Months or Greater, Gross Unrealized Losses (684) (732)
Total, Fair Value 15,636 20,295
Total, Gross Unrealized Losses (684) (1,661)
US States and Political Subdivisions Debt Securities [Member] | Taxable [Member]
    
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value   1,301
Less than Twelve Months, Gross Unrealized Losses   (38)
Total, Fair Value   1,301
Total, Gross Unrealized Losses   (38)
US States and Political Subdivisions Debt Securities [Member] | Tax-exempt [Member]
    
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value   26,743
Less than Twelve Months, Gross Unrealized Losses   (2,883)
Twelve Months or Greater, Fair Value   2,678
Twelve Months or Greater, Gross Unrealized Losses   (383)
Total, Fair Value   29,421
Total, Gross Unrealized Losses   (3,267)
US States and Political Subdivisions Debt Securities [Member]
    
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value 4,343  
Less than Twelve Months, Gross Unrealized Losses (20)  
Twelve Months or Greater, Fair Value 19,145  
Twelve Months or Greater, Gross Unrealized Losses (1,099)  
Total, Fair Value 23,488  
Total, Gross Unrealized Losses (1,119)  
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
    
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]    
Less than Twelve Months, Fair Value 1,068 18,082
Less than Twelve Months, Gross Unrealized Losses (5) (757)
Twelve Months or Greater, Fair Value 19,707 5,248
Twelve Months or Greater, Gross Unrealized Losses (459) (271)
Total, Fair Value 20,775 23,330
Total, Gross Unrealized Losses $ (464) $ (1,028)