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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Income Per Common Share Computations [Abstract]
Net income, basic and diluted	$ 3,547	$ 3,147	$ 7,339	$ 6,456
Less preferred stock dividends and discount accretion	487	480	972	958
Net income available to common shareholders, basic and diluted	$ 3,060	$ 2,667	$ 6,367	$ 5,498
Average common shares issued and outstanding, basic and diluted (in Shares)	7,473	7,454	7,471	7,450
Net income per common share, basic and diluted (in Dollars per share)	$ 0.41	$ 0.36	$ 0.85	$ 0.74