Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
OREO [Member] | Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - 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 11 - Fair Value Measurements (Details) - 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 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	14,445
OREO [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	14,445
Construction and Land Development OREO [Member] | Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Construction and Land Development OREO [Member] | Fair Value, Inputs, Level 2 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Construction and Land Development OREO [Member] | Fair Value, Inputs, Level 3 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		8,123
Construction and Land Development OREO [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		8,123
Residential Real Estate OREO [Member] | Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Residential Real Estate OREO [Member] | Fair Value, Inputs, Level 2 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Residential Real Estate OREO [Member] | Fair Value, Inputs, Level 3 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		863
Residential Real Estate OREO [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		863
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 2 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Farmland and Other Commercial Enterprises OREO [Member] | Fair Value, Inputs, Level 3 [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		5,459
Farmland and Other Commercial Enterprises OREO [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		5,459
Real Estate Mortgage Residential [Member] | Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	0
Real Estate Mortgage Residential [Member] | Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	0
Real Estate Mortgage Residential [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	177	946
Real Estate Mortgage Residential [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	177	946
Real Estate Mortgage Farmland and Other Commercial Enterprises [Member] | Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - 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] | Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - 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] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	242	340
Real Estate Mortgage Farmland and Other Commercial Enterprises [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	242	340
Real Estate Construction and Land Development [Member] | Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Real Estate Construction and Land Development [Member] | Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		0
Real Estate Construction and Land Development [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		284
Real Estate Construction and Land Development [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring		284
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	0
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	0	0
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	419	1,570
Impaired Loans [Member]
Note 11 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Assets fair value, nonrecurring	$ 419	$ 1,570