Note 3 - Loans (Details) - Loan Modifications (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013 Commercial and Industrial [Member] Quarter to Date [Member]	Sep. 30, 2012 Commercial and Industrial [Member] Quarter to Date [Member]	Sep. 30, 2013 Commercial and Industrial [Member] Year to Date [Member]	Sep. 30, 2012 Commercial and Industrial [Member] Year to Date [Member]	Sep. 30, 2013 Commercial Real Estate Loans [Member] Quarter to Date [Member]	Sep. 30, 2012 Commercial Real Estate Loans [Member] Quarter to Date [Member]	Sep. 30, 2013 Commercial Real Estate Loans [Member] Year to Date [Member]	Sep. 30, 2012 Commercial Real Estate Loans [Member] Year to Date [Member]	Sep. 30, 2013 First Lien Residential Mortgage Loans [Member] Quarter to Date [Member]	Sep. 30, 2012 First Lien Residential Mortgage Loans [Member] Quarter to Date [Member]	Sep. 30, 2013 First Lien Residential Mortgage Loans [Member] Year to Date [Member]	Sep. 30, 2012 First Lien Residential Mortgage Loans [Member] Year to Date [Member]	Sep. 30, 2013 Junior Lein Residential Mortgage Loans [Member] Quarter to Date [Member]	Sep. 30, 2012 Junior Lein Residential Mortgage Loans [Member] Quarter to Date [Member]	Sep. 30, 2013 Junior Lein Residential Mortgage Loans [Member] Year to Date [Member]	Sep. 30, 2012 Junior Lein Residential Mortgage Loans [Member] Year to Date [Member]	Sep. 30, 2013 Consumer Loans [Member] Quarter to Date [Member]	Sep. 30, 2012 Consumer Loans [Member] Quarter to Date [Member]	Sep. 30, 2013 Consumer Loans [Member] Year to Date [Member]	Sep. 30, 2012 Consumer Loans [Member] Year to Date [Member]	Sep. 30, 2013 Quarter to Date [Member]	Sep. 30, 2012 Quarter to Date [Member]	Sep. 30, 2013 Year to Date [Member]	Sep. 30, 2012 Year to Date [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	2	3	5	9	0	4	5	12	1	6	6	16	0	1	1	3	0	0	0	2	3	14	17	42
Troubled Debt Restructurings Pre-modification outstanding recorded investment	$ 219	$ 190	$ 308	$ 998	$ 0	$ 1,613	$ 1,661	$ 3,598	$ 203	$ 871	$ 1,040	$ 1,673	$ 0	$ 15	$ 19	$ 118	$ 0	$ 0	$ 0	$ 107	$ 422	$ 2,689	$ 3,028	$ 6,494
Troubled Debt Restructurings Post-modification outstanding recorded investment	217	187	305	988	0	1,590	1,671	3,573	134	870	970	1,669	0	15	19	118	0	0	0	107	351	2,662	2,965	6,455
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0	2	5	0	0	0	4	2	1	5	1	0	1	0	1	0	0	0	0	2	2	7	11
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	$ 0	$ 0	$ 100	$ 1,143	$ 0	$ 0	$ 0	$ 401	$ 172	$ 64	$ 568	$ 64	$ 0	$ 9	$ 0	$ 9	$ 0	$ 0	$ 0	$ 0	$ 172	$ 73	$ 668	$ 1,617