Note 3 - Loans (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Related Allowance	$ 6,432	$ 6,100
Related Allowance	6,432	6,100
Total
Impaired loans - recorded investment	27,274	30,289
Impaired loans - unpaid principal balance	33,663	36,388
Impaired loans - related allowance	6,432	6,100
Commercial and Industrial [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,626	891
Unpaid Principal Balance	1,635	891
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
Commercial and Industrial [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	509	515
Recorded Investment	655	2,273
Unpaid Principal Balance	1,162	2,792
Related Allowance	509	515
Total
Impaired loans - related allowance	509	515
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	509	515
Related Allowance	509	515
Total
Impaired loans - recorded investment	2,281	3,164
Impaired loans - unpaid principal balance	2,797	3,683
Impaired loans - related allowance	509	515
Commercial Real Estate Other Receivable [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,083	9,215
Unpaid Principal Balance	8,071	9,212
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
Commercial Real Estate Other Receivable [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,839	2,971
Recorded Investment	8,620	8,377
Unpaid Principal Balance	11,422	11,346
Related Allowance	2,839	2,971
Total
Impaired loans - related allowance	2,839	2,971
Commercial Real Estate Other Receivable [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,839	2,971
Related Allowance	2,839	2,971
Total
Impaired loans - recorded investment	16,703	17,592
Impaired loans - unpaid principal balance	19,493	20,558
Impaired loans - related allowance	2,839	2,971
First Lien Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
First Lien Residential Mortgage Loans [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,883	2,298
Recorded Investment	7,782	8,695
Unpaid Principal Balance	10,665	10,993
Related Allowance	2,883	2,298
Total
Impaired loans - related allowance	2,883	2,298
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,883	2,298
Related Allowance	2,883	2,298
Total
Impaired loans - recorded investment	7,782	8,695
Impaired loans - unpaid principal balance	10,665	10,993
Impaired loans - related allowance	2,883	2,298
Junior Lein Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
Junior Lein Residential Mortgage Loans [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	161	90
Recorded Investment	390	472
Unpaid Principal Balance	551	562
Related Allowance	161	90
Total
Impaired loans - related allowance	161	90
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	161	90
Related Allowance	161	90
Total
Impaired loans - recorded investment	390	472
Impaired loans - unpaid principal balance	551	562
Impaired loans - related allowance	161	90
Consumer Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
Consumer Loans [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	40	226
Recorded Investment	118	366
Unpaid Principal Balance	157	592
Related Allowance	40	226
Total
Impaired loans - related allowance	40	226
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	40	226
Related Allowance	40	226
Total
Impaired loans - recorded investment	118	366
Impaired loans - unpaid principal balance	157	592
Impaired loans - related allowance	40	226
No Allocated Allowance [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,709	10,106
Unpaid Principal Balance	9,706	10,103
Related Allowance	0	0
Related Allowance	0	0
Total
Impaired loans - related allowance	0	0
Allocated Allowance [Member] | Period End Loans Allocated Allowance Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	6,432	6,100
Recorded Investment	17,565	20,183
Unpaid Principal Balance	23,957	26,285
Related Allowance	6,432	6,100
Total
Impaired loans - related allowance	$ 6,432	$ 6,100