Note 3 - Loans (Details) - Loan Modifications (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013 Commercial and Industrial [Member] Quarter to Date [Member]	Jun. 30, 2012 Commercial and Industrial [Member] Quarter to Date [Member]	Jun. 30, 2013 Commercial and Industrial [Member] Year to Date [Member]	Jun. 30, 2012 Commercial and Industrial [Member] Year to Date [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member] Quarter to Date [Member]	Jun. 30, 2012 Commercial Real Estate Loans [Member] Quarter to Date [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member] Year to Date [Member]	Jun. 30, 2012 Commercial Real Estate Loans [Member] Year to Date [Member]	Jun. 30, 2013 First Lien Residential Mortgage Loans [Member] Quarter to Date [Member]	Jun. 30, 2012 First Lien Residential Mortgage Loans [Member] Quarter to Date [Member]	Jun. 30, 2013 First Lien Residential Mortgage Loans [Member] Year to Date [Member]	Jun. 30, 2012 First Lien Residential Mortgage Loans [Member] Year to Date [Member]	Jun. 30, 2013 Junior Lein Residential Mortgage Loans [Member] Quarter to Date [Member]	Jun. 30, 2012 Junior Lein Residential Mortgage Loans [Member] Quarter to Date [Member]	Jun. 30, 2013 Junior Lein Residential Mortgage Loans [Member] Year to Date [Member]	Jun. 30, 2012 Junior Lein Residential Mortgage Loans [Member] Year to Date [Member]	Jun. 30, 2013 Consumer Loans [Member] Quarter to Date [Member]	Jun. 30, 2012 Consumer Loans [Member] Quarter to Date [Member]	Jun. 30, 2013 Consumer Loans [Member] Year to Date [Member]	Jun. 30, 2012 Consumer Loans [Member] Year to Date [Member]	Jun. 30, 2013 Quarter to Date [Member]	Jun. 30, 2012 Quarter to Date [Member]	Jun. 30, 2013 Year to Date [Member]	Jun. 30, 2012 Year to Date [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings Number of contracts	0	1	3	6	0	0	5	8	3	6	5	10	1	0	1	2	0	0	0	2	4	7	14	28
Troubled Debt Restructurings Pre-modification outstanding recorded investment	$ 0	$ 21	$ 89	$ 808	$ 0	$ 0	$ 1,661	$ 1,985	$ 574	$ 425	$ 837	$ 802	$ 19	$ 0	$ 19	$ 103	$ 0	$ 0	$ 0	$ 107	$ 593	$ 446	$ 2,606	$ 3,805
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	19	88	801	0	0	1,671	1,983	573	422	836	799	19	0	19	103	0	0	0	107	592	441	2,614	3,793
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	0	2	5	0	1	0	4	0	0	3	0	0	0	0	0	0	0	0	0	1	1	4	9
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	$ 91	$ 0	$ 100	$ 1,143	$ 0	$ 96	$ 0	$ 401	$ 0	$ 0	$ 396	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 91	$ 96	$ 496	$ 1,544