Note 3 - Loans (Details) - Credit Quality Indicators (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commercial and Industrial
Performing loans	$ 969,552	$ 987,146
Commercial and Industrial [Member] | Pass [Member]
Commercial and Industrial
Performing loans	148,483	152,031
Commercial and Industrial [Member] | Watch Loan [Member]
Commercial and Industrial
Performing loans	6,807	6,578
Commercial and Industrial [Member] | Special Mention [Member]
Commercial and Industrial
Performing loans	4,384	4,549
Commercial and Industrial [Member] | Substandard [Member]
Commercial and Industrial
Performing loans	2,470	2,448
Commercial and Industrial [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Performing loans	824	1,272
Commercial and Industrial [Member] | Impaired Nonaccrual Loans [Member]
Commercial and Industrial
Performing loans	110	116
Commercial and Industrial [Member]
Commercial and Industrial
Performing loans	163,078	166,994
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Commercial and Industrial
Performing loans	388,821	391,485
Commercial Real Estate Portfolio Segment [Member] | Watch Loan [Member]
Commercial and Industrial
Performing loans	45,594	46,061
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Commercial and Industrial
Performing loans	13,452	16,623
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Commercial and Industrial
Performing loans	7,786	5,764
Commercial Real Estate Portfolio Segment [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Performing loans	13,306	14,016
Commercial Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Commercial and Industrial
Performing loans	5,559	5,447
Commercial Real Estate Portfolio Segment [Member]
Commercial and Industrial
Performing loans	474,518	479,396
First Lien Residential Mortgage Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Performing loans	5,081	5,030
First Lien Residential Mortgage Loans [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Performing loans	204,799	207,019
First Lien Residential Mortgage Loans [Member] | Loans More Than 60 Days Past Due [Member]
Commercial and Industrial
Performing loans	169	686
First Lien Residential Mortgage Loans [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Performing loans	3,450	4,217
First Lien Residential Mortgage Loans [Member]
Commercial and Industrial
Performing loans	213,499	216,952
Junior Lein Residential Mortgage Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Performing loans	243	246
Junior Lein Residential Mortgage Loans [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Performing loans	51,956	53,874
Junior Lein Residential Mortgage Loans [Member] | Loans More Than 60 Days Past Due [Member]
Commercial and Industrial
Performing loans	0	81
Junior Lein Residential Mortgage Loans [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Performing loans	285	287
Junior Lein Residential Mortgage Loans [Member]
Commercial and Industrial
Performing loans	52,484	54,488
Consumer Portfolio Segment [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Performing loans	130	132
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Performing loans	65,618	68,987
Consumer Portfolio Segment [Member] | Loans More Than 60 Days Past Due [Member]
Commercial and Industrial
Performing loans	53	36
Consumer Portfolio Segment [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Performing loans	26	9
Consumer Portfolio Segment [Member]
Commercial and Industrial
Performing loans	65,827	69,164
Deferred Fees and Costs [Member]
Commercial and Industrial
Performing loans	$ 146	$ 152