Note 5 - Loans (Details) - Composition of Troubled Debt Restructurings Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended					3 Months Ended	12 Months Ended
	Mar. 31, 2014 Performing Troubled Debt Restructured Loans [Member]	Dec. 31, 2013 Performing Troubled Debt Restructured Loans [Member] Non Performing Troubled Debt Restructured Loans [Member]	Mar. 31, 2014 Non Performing Troubled Debt Restructured Loans [Member] Performing Troubled Debt Restructured Loans [Member]	Dec. 31, 2013 Non Performing Troubled Debt Restructured Loans [Member]	Mar. 31, 2014 Non Performing Other Loans [Member] Performing Troubled Debt Restructured Loans [Member]	Dec. 31, 2013 Non Performing Other Loans [Member] Non Performing Troubled Debt Restructured Loans [Member]	Mar. 31, 2014 Performing Other Loans [Member] Performing Troubled Debt Restructured Loans [Member]	Dec. 31, 2013 Performing Other Loans [Member] Non Performing Troubled Debt Restructured Loans [Member]	Mar. 31, 2014 Performing Troubled Debt Restructured Loans [Member]	Dec. 31, 2013 Non Performing Troubled Debt Restructured Loans [Member]
Note 5 - Loans (Details) - Composition of Troubled Debt Restructurings Impaired Loans [Line Items]
Troubled debt restructurings with a payment default	$ 25,662	$ 26,744	$ 1,942	$ 2,184					$ 27,604	$ 28,928
Impaired loans	$ 25,662	$ 26,744	$ 1,942	$ 2,184	$ 6,048	$ 6,580	$ 9,730	$ 9,187	$ 43,382	$ 44,695