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		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Income Per Common Share Computations [Abstract]
Net income, basic and diluted	$ 4,824	$ 3,547	$ 8,194	$ 7,339
Less preferred stock dividends and discount accretion	563	487	1,100	972
Net income available to common shareholders, basic and diluted	$ 4,261	$ 3,060	$ 7,094	$ 6,367
Average common shares issued and outstanding, basic and diluted (in Shares)	7,482	7,473	7,481	7,471
Net income per common share, basic and diluted (in Dollars per share)	$ 0.57	$ 0.41	$ 0.95	$ 0.85