Note 5 - Securities (Details) - Sales of Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Note 5 - Securities (Details) - Sales of Securities [Line Items]
Proceeds from sales of securities	$ 36,686	$ 9,973
Gross realized gains on sales of securities:
Gross realized gains on sales of securities	327	189
Gross realized losses on sales of securities
Gross realized losses on sales of securities	(572)
(Loss) gain on investment securities, net	(245)	189
Obligations Of State And Political Subdivisions [Member]
Gross realized gains on sales of securities:
Gross realized gains on sales of securities	157	33
Gross realized losses on sales of securities
Gross realized losses on sales of securities	(90)
Residential Mortgage Backed Securities and Collateralized Mortgage Obligations [Member]
Gross realized gains on sales of securities:
Gross realized gains on sales of securities	6	87
Gross realized losses on sales of securities
Gross realized losses on sales of securities	(469)
Corporate Debt Securities [Member]
Gross realized gains on sales of securities:
Gross realized gains on sales of securities	141	17
Other Asset Backed Securities [Member]
Gross realized gains on sales of securities:
Gross realized gains on sales of securities	23	52
Gross realized losses on sales of securities
Gross realized losses on sales of securities	(12)
Commercial Mortgage Backed Securities [Member]
Gross realized losses on sales of securities
Gross realized losses on sales of securities	$ (1)