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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income Per Common Share Computations [Abstract]
Net income, basic and diluted	$ 3,035	$ 3,091	$ 10,374	$ 9,547
Less preferred stock dividends and discount accretion	489	481	1,461	1,439
Net income available to common shareholders, basic and diluted	$ 2,546	$ 2,610	$ 8,913	$ 8,108
Average common shares issued and outstanding, basic and diluted (in Shares)	7,475	7,461	7,473	7,454
Net income per common share, basic and diluted (in Dollars per share)	$ 0.34	$ 0.35	$ 1.19	$ 1.09