Note 3 - Loans (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	$ 7,318	$ 6,100
Loans with Allocated Allowance for loan Losses, Related Allowance	7,318	6,100
Total
Impaired loans - recorded investment	24,164	30,289
Impaired loans - unpaid principal balance	31,376	36,388
Impaired loans - related allowance	7,318	6,100
Commercial and Industrial [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	341	891
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	337	891
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	524	515
Loans with Allocated Allowance for loan Losses, Recorded Investment	805	2,273
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	1,322	2,792
Loans with Allocated Allowance for loan Losses, Related Allowance	524	515
Total
Impaired loans - related allowance	524	515
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	524	515
Loans with Allocated Allowance for loan Losses, Related Allowance	524	515
Total
Impaired loans - recorded investment	1,146	3,164
Impaired loans - unpaid principal balance	1,659	3,683
Impaired loans - related allowance	524	515
Commercial Real Estate Other Receivable [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	6,692	9,215
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	6,676	9,212
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	4,137	2,971
Loans with Allocated Allowance for loan Losses, Recorded Investment	8,767	8,377
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	12,871	11,346
Loans with Allocated Allowance for loan Losses, Related Allowance	4,137	2,971
Total
Impaired loans - related allowance	4,137	2,971
Commercial Real Estate Other Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	4,137	2,971
Loans with Allocated Allowance for loan Losses, Related Allowance	4,137	2,971
Total
Impaired loans - recorded investment	15,459	17,592
Impaired loans - unpaid principal balance	19,545	20,558
Impaired loans - related allowance	4,137	2,971
First Lien Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	0	0
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	0	0
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	2,493	2,298
Loans with Allocated Allowance for loan Losses, Recorded Investment	7,058	8,695
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	9,504	10,993
Loans with Allocated Allowance for loan Losses, Related Allowance	2,493	2,298
Total
Impaired loans - related allowance	2,493	2,298
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	2,493	2,298
Loans with Allocated Allowance for loan Losses, Related Allowance	2,493	2,298
Total
Impaired loans - recorded investment	7,058	8,695
Impaired loans - unpaid principal balance	9,505	10,993
Impaired loans - related allowance	2,493	2,298
Junior Lein Residential Mortgage Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	0	0
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	0	0
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	137	90
Loans with Allocated Allowance for loan Losses, Recorded Investment	386	472
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	523	562
Loans with Allocated Allowance for loan Losses, Related Allowance	137	90
Total
Impaired loans - related allowance	137	90
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	137	90
Loans with Allocated Allowance for loan Losses, Related Allowance	137	90
Total
Impaired loans - recorded investment	386	472
Impaired loans - unpaid principal balance	523	562
Impaired loans - related allowance	137	90
Consumer Loans [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	0	0
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	0	0
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	27	226
Loans with Allocated Allowance for loan Losses, Recorded Investment	115	366
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	141	592
Loans with Allocated Allowance for loan Losses, Related Allowance	27	226
Total
Impaired loans - related allowance	27	226
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Related Allowance	27	226
Loans with Allocated Allowance for loan Losses, Related Allowance	27	226
Total
Impaired loans - recorded investment	115	366
Impaired loans - unpaid principal balance	141	592
Impaired loans - related allowance	27	226
No Allocated Allowance [Member] | Period End Loans No Allocated Allowance For Loan Losses [Member]
Financing Receivable, Impaired [Line Items]
Loans with No Allocated Allowance for loan Losses, Recorded Investment	7,033	10,106
Loans with No Allocated Allowance for loan Losses, Unpaid Principal Balance	7,013	10,103
Loans with No Allocated Allowance for loan Losses, Related Allowance	0	0
Loans with Allocated Allowance for loan Losses, 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]
Loans with No Allocated Allowance for loan Losses, Related Allowance	7,318	6,100
Loans with Allocated Allowance for loan Losses, Recorded Investment	17,131	20,183
Loans with Allocated Allowance for loan Losses, Unpaid Principal Balance	24,361	26,285
Loans with Allocated Allowance for loan Losses, Related Allowance	7,318	6,100
Total
Impaired loans - related allowance	$ 7,318	$ 6,100