Note 6 - Loans (Details) - Credit Quality Indicators (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Commercial and Industrial
Financing Receivable	$ 987,146	$ 963,762
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Commercial and Industrial
Financing Receivable	0	25
Commercial and Industrial [Member] | Pass [Member]
Commercial and Industrial
Financing Receivable	152,031	133,678
Commercial and Industrial [Member] | Watch Loan [Member]
Commercial and Industrial
Financing Receivable	6,578	5,367
Commercial and Industrial [Member] | Special Mention [Member]
Commercial and Industrial
Financing Receivable	4,549	5,436
Commercial and Industrial [Member] | Substandard [Member]
Commercial and Industrial
Financing Receivable	2,448	1,881
Commercial and Industrial [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Financing Receivable	1,272	3,234
Commercial and Industrial [Member] | Impaired Nonaccrual Loans [Member]
Commercial and Industrial
Financing Receivable	116	448
Commercial and Industrial [Member]
Commercial and Industrial
Financing Receivable	166,994	150,044
Commercial Real Estate Loans [Member] | Pass [Member]
Commercial and Industrial
Financing Receivable	391,485	373,577
Commercial Real Estate Loans [Member] | Watch Loan [Member]
Commercial and Industrial
Financing Receivable	46,061	50,790
Commercial Real Estate Loans [Member] | Special Mention [Member]
Commercial and Industrial
Financing Receivable	16,623	18,117
Commercial Real Estate Loans [Member] | Substandard [Member]
Commercial and Industrial
Financing Receivable	5,764	9,655
Commercial Real Estate Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Financing Receivable	14,016	12,106
Commercial Real Estate Loans [Member] | Impaired Nonaccrual Loans [Member]
Commercial and Industrial
Financing Receivable	5,447	8,427
Commercial Real Estate Loans [Member]
Commercial and Industrial
Financing Receivable	479,396	472,697
First Lien Residential Mortgage Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Financing Receivable	5,030	4,953
First Lien Residential Mortgage Loans [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Financing Receivable	207,019	202,357
First Lien Residential Mortgage Loans [Member] | Loans more than 60 days past due [Member]
Commercial and Industrial
Financing Receivable	686	1,046
First Lien Residential Mortgage Loans [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Financing Receivable	4,217	6,040
First Lien Residential Mortgage Loans [Member]
Commercial and Industrial
Financing Receivable	216,952	214,396
Junior Lein Residential Mortgage Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Financing Receivable	246	235
Junior Lein Residential Mortgage Loans [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Financing Receivable	53,874	58,089
Junior Lein Residential Mortgage Loans [Member] | Loans more than 60 days past due [Member]
Commercial and Industrial
Financing Receivable	81	96
Junior Lein Residential Mortgage Loans [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Financing Receivable	287	327
Junior Lein Residential Mortgage Loans [Member]
Commercial and Industrial
Financing Receivable	54,488	58,747
Consumer Loans [Member] | Impaired Restructured and Accruing Loans [Member]
Commercial and Industrial
Financing Receivable	132	191
Consumer Loans [Member] | Performing Financing Receivable [Member]
Commercial and Industrial
Financing Receivable	68,987	67,042
Consumer Loans [Member] | Loans more than 60 days past due [Member]
Commercial and Industrial
Financing Receivable	36	39
Consumer Loans [Member] | Nonaccrual loans [Member]
Commercial and Industrial
Financing Receivable	9	401
Consumer Loans [Member]
Commercial and Industrial
Financing Receivable	69,164	67,673
Loan Fees [Member]
Commercial and Industrial
Financing Receivable	$ 152	$ 205