Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned [Line Items]
Other Real Estate Owned	$ 20,998	$ 21,843	$ 29,700	$ 31,960
Construction and Land Development OREO [Member]
Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned [Line Items]
Other Real Estate Owned	12,703	12,997
Residential Real Estate OREO [Member]
Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned [Line Items]
Other Real Estate Owned	850	960
Farmland and Other Commercial Enterprises OREO [Member]
Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned [Line Items]
Other Real Estate Owned	7,445	7,886
OREO [Member]
Note 8 - Other Real Estate Owned (Details) - Other Real Estate Owned [Line Items]
Other Real Estate Owned	$ 20,998	$ 21,843