Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Real Estate Construction And Land Development [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	$ 6,482	$ 7,700
Restructured Loans	6,666	8,736
Loans Past Due 90 Days Or More And Still Accruing	0	0
Real Estate Mortgage Residential [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	4,863	6,025
Restructured Loans	2,947	634
Loans Past Due 90 Days Or More And Still Accruing	0	0
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	9,665	12,878
Restructured Loans	16,573	16,940
Loans Past Due 90 Days Or More And Still Accruing	0	103
Commercial And Industrial [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	204	649
Restructured Loans	13	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Lease Financing [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	41	53
Restructured Loans	0	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Consumer Secured [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	4	9
Restructured Loans	0	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Consumer Unsecured [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	0	94
Restructured Loans	39	39
Loans Past Due 90 Days Or More And Still Accruing	0	0
Total [Member]
Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	21,259	27,408
Restructured Loans	26,238	26,349
Loans Past Due 90 Days Or More And Still Accruing		$ 103