Note 8 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans (USD $) In Thousands, unless otherwise specified	Sep. 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	$ 6,332	$ 7,700
Restructured Loans	4,391	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	5,538	6,025
Restructured Loans	4,912	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	13,004	12,878
Restructured Loans	17,086	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	138	649
Restructured Loans	0	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	29	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	22	9
Restructured Loans	8	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	38	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	25,063	27,408
Restructured Loans	26,435	26,349
Loans Past Due 90 Days Or More And Still Accruing	$ 0	$ 103