Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Restructured Loans [Member]	Sep. 30, 2013 Commercial Real Estate Loans [Member]	Sep. 30, 2014 Nonaccrual Loans [Member]	Sep. 30, 2013 Nonaccrual Loans [Member]	Dec. 31, 2013 Nonaccrual Loans [Member]	Sep. 30, 2014 Special Mention [Member]	Sep. 30, 2014 Classified Loans [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Nonaccrual Designation As Impaired Threshold			$ 250
Interest and Fee Income, Loans and Leases	7,766	8,196	23,520	24,707				0	0	0
Threshold Period For Considering Loans As Special Mention Or Classified			75 days
Increase in Percentage of Allocation Loans Rated Special Mention											50.00%
Increase in Percentage of Allocation Loans Rated Classified												100.00%
Financing Receivable, Reclassification to Held-for-sale			0
Transfer of Loans Held-for-sale to Portfolio Loans			0
Financing Receivable, Modifications, Recorded Investment	8,307	7,587	8,307	7,587	7,043
Financing Receivable, Allowance for Credit Losses	8,031		8,031		8,227	249
Financing Receivable, Modifications, Number of Contracts	0	2	2	6
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	5	0	6
		$ 353		$ 353			$ 352