Note 5 - Net Income Per Common Share (Details) - Net Income Per Common Share Computations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income Per Common Share Computations [Abstract]
Net income, basic and diluted	$ 4,107	$ 3,035	$ 12,301	$ 10,374
Less preferred stock dividends and discount accretion	450	489	1,550	1,461
Net income available to common shareholders, basic and diluted	$ 3,657	$ 2,546	$ 10,751	$ 8,913
Average common shares issued and outstanding, basic and diluted (in Shares)	7,485	7,475	7,482	7,473
Net income per common share, basic and diluted (in Dollars per share)	$ 0.49	$ 0.34	$ 1.44	$ 1.19