Note 6 - Loans (Details) - Loan Modifications (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	29	54	38
Troubled Debt Restructurings Pre-modification outstanding recorded investment	$ 2,264	$ 7,857	$ 9,142
Troubled Debt Restructurings Post-modification outstanding recorded investment	2,185	7,605	8,686
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	12	12	23
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	859	1,743	2,529
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	6	11	11
Troubled Debt Restructurings Pre-modification outstanding recorded investment	236	1,199	3,615
Troubled Debt Restructurings Post-modification outstanding recorded investment	235	1,188	3,526
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	5	2
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	1,143	468
Commercial Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	7	17	13
Troubled Debt Restructurings Pre-modification outstanding recorded investment	581	4,456	4,017
Troubled Debt Restructurings Post-modification outstanding recorded investment	581	4,221	3,786
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	2	4	10
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	439	401	1,233
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	14	19	13
Troubled Debt Restructurings Pre-modification outstanding recorded investment	1,399	1,948	1,427
Troubled Debt Restructurings Post-modification outstanding recorded investment	1,342	1,943	1,291
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	9	2	11
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	420	190	828
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	2	4	1
Troubled Debt Restructurings Pre-modification outstanding recorded investment	48	126	83
Troubled Debt Restructurings Post-modification outstanding recorded investment	27	126	83
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	1	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	9	0
Consumer Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	0	3	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	0	128	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	127	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	$ 0	$ 0	$ 0