Note 4 - Allowance for Loan Losses (Details) - Change in Allowance for Loan Losses by Major Classification (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	$ 34,769	$ 35,457	$ 35,907	$ 33,677
Provision charged to operations	6,300	5,585
Loans charged off	(9,371)	(5,434)
Recoveries of loans previously charged off	1,933	1,629
Real Estate - Residential Mortgage (Member)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	2,491	2,340	2,358	2,379
Provision charged to operations	522	576
Loans charged off	(475)	(638)
Recoveries of loans previously charged off	86	23
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	474	386	424	480
Provision charged to operations	50	(94)
commercial, financial and agricultural (Member)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	7,942	10,591	9,824	10,040
Provision charged to operations	328	917
Loans charged off	(2,270)	(402)
Recoveries of loans previously charged off	60	36
Equity Lines (Member)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	886	921	885	912
Provision charged to operations	11	130
Loans charged off	(37)	(121)
Recoveries of loans previously charged off	27
consumer (Member)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	283	323	283	319
Provision charged to operations	149	76
Loans charged off	(228)	(171)
Recoveries of loans previously charged off	79	99
consumer finance (Member)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at	22,693	20,896	22,133	19,547
Provision charged to operations	5,240	3,980
Loans charged off	(6,361)	(4,102)
Recoveries of loans previously charged off	$ 1,681	$ 1,471