Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: (Loans, excluding acquired loans [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	$ 6,263	$ 9,123
Consumer Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	1,162	1,082
Credit Cards [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	334	281
Other Consumer [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	828	801
Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	4,575	7,423
Construction Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	110	463
Single Family Residential Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	2,069	2,706
Other Commercial Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	2,396	4,254
Commercial Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	526	618
Commercial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	439	471
Agricultural Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual loans, excluding loans acquired, segregated by class of loans: [Line Items]
Loans in nonaccrual status	$ 87	$ 147