Note 5 - Stockholders' Equity and Earnings Per Common Share (Details) - Earnings per common share calculations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings per common share calculations [Abstract]
Net income (in Dollars)	$ 4,178	$ 4,181	$ 8,184	$ 7,961
Accumulated dividends on Series A Preferred Stock (in Dollars)		(14)		(139)
Accretion of Series A Preferred Stock discount (in Dollars)		(151)		(172)
Net income available to common shareholders (in Dollars)	$ 4,178	$ 4,016	$ 8,184	$ 7,650
Weighted average number of common shares used in earnings per common share – basic	3,276,039	3,208,792	3,271,376	3,199,655
Stock option awards and Warrant	137,013	87,353	120,789	80,905
Weighted average number of common shares used in earnings per common share – assuming dilution	3,413,052	3,296,145	3,392,165	3,280,560