Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Real Estate Construction And Land Development [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	$ 5,498	$ 5,821
Restructured Loans	4,219	4,391
Loans Past Due 90 Days Or More And Still Accruing	0	0
Real Estate Mortgage Residential [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	5,156	5,154
Restructured Loans	4,790	4,826
Loans Past Due 90 Days Or More And Still Accruing	0	10
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	13,762	12,677
Restructured Loans	16,885	16,987
Loans Past Due 90 Days Or More And Still Accruing	434	434
Commercial And Industrial [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	220	160
Restructured Loans	0	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Lease Financing [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	70	22
Restructured Loans	0	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Commercial Other [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	12
Restructured Loans	0
Loans Past Due 90 Days Or More And Still Accruing	0
Consumer Secured [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	2	3
Restructured Loans	0	0
Loans Past Due 90 Days Or More And Still Accruing	0	0
Consumer Unsecured [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	0	1
Restructured Loans	50	51
Loans Past Due 90 Days Or More And Still Accruing	0	0
Total [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment In Nonperforming Loans By Class Of Loans [Line Items]
Nonaccrual	24,720	23,838
Restructured Loans	25,944	26,255
Loans Past Due 90 Days Or More And Still Accruing	$ 434	$ 444