Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 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]
Fair Value	$ 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]
Fair Value	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]
Fair Value	339	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]
Fair Value	339	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]
Fair Value	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]
Fair Value	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]
Fair Value	3,720	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]
Fair Value	3,720	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]
Fair Value	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]
Fair Value	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]
Fair Value	2,669	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]
Fair Value	2,669	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]
Fair Value	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]
Fair Value	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]
Fair Value	85	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]
Fair Value	85	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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value		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]
Fair Value	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]
Fair Value	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]
Fair Value	7,911	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]
Fair Value	7,911	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]
Fair Value	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]
Fair Value	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]
Fair Value	1,573	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]
Fair Value	1,573	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]
Fair Value	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]
Fair Value	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]
Fair Value	6,205	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]
Fair Value	6,205	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]
Fair Value	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]
Fair Value	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]
Fair Value	15,689	21,182
OREO [Member]
Note 6 - Fair Value Measurements (Details) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	15,689	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]
Fair Value	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]
Fair Value	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]
Fair Value	6,813	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]
Fair Value	$ 6,813	$ 23,843