Note 5 - Net Income Per Common Share (Details) - Net Income Per Common Share Computations - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income Per Common Share Computations [Abstract]
Net income, basic and diluted	$ 3,832	$ 4,107	$ 11,408	$ 12,301
Less preferred stock dividends and discount accretion	0	450	395	1,550
Net income available to common shareholders, basic and diluted	$ 3,832	$ 3,657	$ 11,013	$ 10,751
Average common shares issued and outstanding, basic and diluted (in Shares)	7,495	7,485	7,492	7,482
Net income per common share, basic and diluted (in Dollars per share)	$ 0.51	$ 0.49	$ 1.47	$ 1.44