Note 8 - Other Real Estate Owned (Detail) - Other Real Estate Owned (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Other Real Estate Owned	$ 47,480	$ 38,157	$ 35,993	$ 30,545
Construction and Land Development OREO [Member]
Other Real Estate Owned	30,096	21,951
Residential Real Estate OREO [Member]
Other Real Estate Owned	6,382	5,591
Farmland and Other Commercial Enterprises OREO [Member]
Other Real Estate Owned	11,002	10,615
Total OREO [Member]
Other Real Estate Owned	$ 47,480	$ 38,157