Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Nonperforming Loans by Class of Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Nonperforming Loans by Class of Loans [Line Items]
Nonaccrual	$ 15,530	$ 23,838
Restructured Loans	25,289	26,255
Loans Past Due 90 Days or More and Still Accruing	0	444
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	4,525	5,821
Restructured Loans	3,981	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	4,854	5,154
Restructured Loans	4,735	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	6,027	12,677
Restructured Loans	16,563	16,987
Loans Past Due 90 Days or More and Still Accruing	0	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	111	160
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	8
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	4	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	1	1
Restructured Loans	10	51
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		22
Restructured Loans		0
Loans Past Due 90 Days or More and Still Accruing		$ 0