Note 10 - Other Comprehensive Income (Details) - Components of Other Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Components of Other Comprehensive Income (Loss) [Abstract]
Net unrealized gain (loss) on securities available-for-sale, before tax	$ 3,512	$ (543)	$ 3,325	$ 8,062
Net unrealized gain (loss) on securities available-for-sale, tax effect	1,405	(217)	1,330	3,225
Net unrealized gain (loss) on securities available-for-sale, net of tax	2,107	(326)	1,995	4,837
Net unrealized gain on derivatives-before tax	(6,627)		(3,445)
Net unrealized gain on derivatives-tax effect	(2,651)		(1,378)
Net unrealized gain on derivatives-net of tax	(3,976)		(2,067)
Less: Reclassification adjustment for net gains included in net income-before tax	(60)		(2,224)	(10)
Less: Reclassification adjustment for net gains included in net income-tax effect	(24)		(890)	(4)
Less: Reclassification adjustment for net gains included in net income-net of tax	(36)		(1,334)	(6)
Other Comprehensive Income (Loss), before tax	(3,175)	(543)	(2,344)	8,052
Other Comprehensive Income (Loss), tax effect	(1,270)	(217)	(938)	3,221
Other Comprehensive Income (Loss), net of tax	$ (1,905)	$ (326)	$ (1,406)	$ 4,831