Note 3 - Loans (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	$ 6,029	$ 6,496
Period End Loans With Related Allowance Related Allowance	6,029	6,496
Total
Period End Loans With Related Allowance Recorded Investment	23,040	24,409
Period End Loans With Related Allowance Unpaid Principal Balance	29,014	30,772
Period End Loans With Related Allowance Related Allowance	6,029	6,496
Commercial and Industrial [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	129	398
Period End Loans With No Related Allowance Unpaid Principal Balance	128	396
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
Commercial and Industrial [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	438	549
Period End Loans With Related Allowance Recorded Investment	374	448
Period End Loans With Related Allowance Unpaid Principal Balance	806	992
Period End Loans With Related Allowance Related Allowance	438	549
Total
Period End Loans With Related Allowance Related Allowance	438	549
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	438	549
Period End Loans With Related Allowance Related Allowance	438	549
Total
Period End Loans With Related Allowance Recorded Investment	503	846
Period End Loans With Related Allowance Unpaid Principal Balance	934	1,388
Period End Loans With Related Allowance Related Allowance	438	549
Commercial Real Estate Portfolio Segment [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	8,113	7,473
Period End Loans With No Related Allowance Unpaid Principal Balance	8,090	7,449
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
Commercial Real Estate Portfolio Segment [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	3,406	3,678
Period End Loans With Related Allowance Recorded Investment	7,395	8,313
Period End Loans With Related Allowance Unpaid Principal Balance	10,777	12,014
Period End Loans With Related Allowance Related Allowance	3,406	3,678
Total
Period End Loans With Related Allowance Related Allowance	3,406	3,678
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	3,406	3,678
Period End Loans With Related Allowance Related Allowance	3,406	3,678
Total
Period End Loans With Related Allowance Recorded Investment	15,508	15,786
Period End Loans With Related Allowance Unpaid Principal Balance	18,867	19,463
Period End Loans With Related Allowance Related Allowance	3,406	3,678
First Lien Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	0	0
Period End Loans With No Related Allowance Unpaid Principal Balance	0	0
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
First Lien Residential Mortgage Loans [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	1,977	2,082
Period End Loans With Related Allowance Recorded Investment	6,553	7,013
Period End Loans With Related Allowance Unpaid Principal Balance	8,530	9,247
Period End Loans With Related Allowance Related Allowance	1,977	2,082
Total
Period End Loans With Related Allowance Related Allowance	1,977	2,082
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	1,977	2,082
Period End Loans With Related Allowance Related Allowance	1,977	2,082
Total
Period End Loans With Related Allowance Recorded Investment	6,553	7,013
Period End Loans With Related Allowance Unpaid Principal Balance	8,530	9,247
Period End Loans With Related Allowance Related Allowance	1,977	2,082
Junior Lein Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	0	0
Period End Loans With No Related Allowance Unpaid Principal Balance	0	0
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
Junior Lein Residential Mortgage Loans [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	178	168
Period End Loans With Related Allowance Recorded Investment	351	365
Period End Loans With Related Allowance Unpaid Principal Balance	529	533
Period End Loans With Related Allowance Related Allowance	178	168
Total
Period End Loans With Related Allowance Related Allowance	178	168
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	178	168
Period End Loans With Related Allowance Related Allowance	178	168
Total
Period End Loans With Related Allowance Recorded Investment	351	365
Period End Loans With Related Allowance Unpaid Principal Balance	529	533
Period End Loans With Related Allowance Related Allowance	178	168
Consumer Portfolio Segment [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	0	0
Period End Loans With No Related Allowance Unpaid Principal Balance	0	0
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
Consumer Portfolio Segment [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	30	19
Period End Loans With Related Allowance Recorded Investment	125	399
Period End Loans With Related Allowance Unpaid Principal Balance	154	141
Period End Loans With Related Allowance Related Allowance	30	19
Total
Period End Loans With Related Allowance Related Allowance	30	19
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	30	19
Period End Loans With Related Allowance Related Allowance	30	19
Total
Period End Loans With Related Allowance Recorded Investment	125	399
Period End Loans With Related Allowance Unpaid Principal Balance	154	141
Period End Loans With Related Allowance Related Allowance	30	19
Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Recorded Investment	8,242	7,871
Period End Loans With No Related Allowance Unpaid Principal Balance	8,218	7,845
Period End Loans With No Related Allowance Related Allowance	0	0
Period End Loans With Related Allowance Related Allowance	0	0
Total
Period End Loans With Related Allowance Related Allowance	0	0
Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Period End Loans With No Related Allowance Related Allowance	6,029	6,496
Period End Loans With Related Allowance Recorded Investment	14,798	16,538
Period End Loans With Related Allowance Unpaid Principal Balance	20,796	22,927
Period End Loans With Related Allowance Related Allowance	6,029	6,496
Total
Period End Loans With Related Allowance Related Allowance	$ 6,029	$ 6,496