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Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Real Estate Construction And Land Development [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring $ 0 $ 0
Real Estate Construction And Land Development [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Construction And Land Development [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 335 17,921
Real Estate Construction And Land Development [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 335 17,921
Real Estate Mortgage Residential [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Residential [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Residential [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 3,077 2,273
Real Estate Mortgage Residential [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 3,077 2,273
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 3,450 3,523
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 3,450 3,523
Commercial And Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Commercial And Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Commercial And Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 88 9
Commercial And Industrial [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 88 9
Consumer Secured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   0
Consumer Secured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   0
Consumer Secured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   4
Consumer Secured [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   4
Consumer Unsecured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   0
Consumer Unsecured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   0
Consumer Unsecured [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   113
Consumer Unsecured [Member] | Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring   113
Real Estate Construction And Land Development OREO [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Construction And Land Development OREO [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Construction And Land Development OREO [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 11,454 15,873
Real Estate Construction And Land Development OREO [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 11,454 15,873
Real Estate Mortgage Residential OREO [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Residential OREO [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Real Estate Mortgage Residential OREO [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 1,527 1,483
Real Estate Mortgage Residential OREO [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 1,527 1,483
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 9,106 3,826
Farmland and Other Commercial Enterprises OREO [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 9,106 3,826
OREO [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
OREO [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
OREO [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 22,087 21,182
OREO [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 22,087 21,182
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 0 0
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring 6,950 23,843
Impaired Loans [Member]
    
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]    
Assets fair value, nonrecurring $ 6,950 $ 23,843