Note 4 - Loans (Details) - Major Classifications of Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	$ 818,765		$ 820,384
Less allowance for loan losses	(34,908)		(34,852)
Loans, net	783,857		785,532
Real Estate - Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	182,571		188,455
Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	6,402		5,810
Commercial, Financial And Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	295,208	[1]	288,593	[1]
Equity Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	49,891	[1]	50,795	[1]
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	8,270		9,007
Consumer Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Major Classifications of Loans	$ 276,423		$ 277,724

[1] Includes the Corporation's commercial real estate lending, land acquisition and development lending, builder line lending and commercial business lending.