Note 3 - Loans (Details) - Loan Modifications (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	3	10
Troubled Debt Restructurings Pre-modification outstanding recorded investment	$ 129	$ 2,013
Troubled Debt Restructurings Post-modification outstanding recorded investment	98	2,022
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	3	4
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	519	405
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	1	3
Troubled Debt Restructurings Pre-modification outstanding recorded investment	60	89
Troubled Debt Restructurings Post-modification outstanding recorded investment	60	88
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	1
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	9
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	0	5
Troubled Debt Restructurings Pre-modification outstanding recorded investment	0	1,661
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	1,671
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	2	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	504	0
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	2	2
Troubled Debt Restructurings Pre-modification outstanding recorded investment	69	263
Troubled Debt Restructurings Post-modification outstanding recorded investment	38	263
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	3
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	15	396
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	0	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	0	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	0	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	0	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	$ 0	$ 0