Note 7 - Loans (Details) - Troubled Debt Restructuring (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Commercial Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Commercial Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2014 Commercial Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Commercial Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2014 Residential Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Residential Mortgage Loans [Member] Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2014 Accruing Troubled Debt Restructuring [Member]	Sep. 30, 2013 Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) - Troubled Debt Restructuring [Line Items]
No. of Loans			6	9	3	3	5	11	14	23
Pre-Modification Recorded Investment			$ 10,773	$ 11,705	$ 11,818	$ 7,474	$ 2,226	$ 3,736	$ 24,817	$ 22,915
Post-Modification Recorded Investment			10,773	10,516	11,818	7,474	2,226	3,658	24,817	21,648
Charge-offs				1,189				78		1,267
Specific Reserve	$ 13,814	$ 13,284	$ 26	$ 71	$ 564	$ 191	$ 16	$ 125	$ 606	$ 387