Note 21 - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Data (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Data (Unaudited) [Abstract]
Interest income	$ 15,671	$ 15,976	$ 16,331	$ 16,374	$ 16,797	$ 16,563	$ 16,631	$ 16,742	$ 64,352	$ 66,733	$ 71,222
Interest expense	2,341	2,513	2,604	2,695	2,838	2,953	3,038	3,166	10,153	11,995	18,258
Net interest income	13,330	13,463	13,727	13,679	13,959	13,610	13,593	13,576	54,199	54,738	52,964
Provision for loan losses	(1,572)	(1,536)	(1,388)	132	(1,020)	(586)	(362)	(632)	(4,364)	(2,600)	2,772
Net interest income after provision for loan losses	14,902	14,999	15,115	13,547	14,979	14,196	13,955	14,208	58,563	57,338	50,192
Noninterest income	5,767	6,142	5,991	5,373	5,586	5,678	5,441	5,411	23,273	22,116	24,654
Noninterest expense	14,774	15,751	14,323	14,430	16,358	15,984	14,722	14,509	59,278	61,573	59,787
Income before income taxes	5,895	5,390	6,783	4,490	4,207	3,890	4,674	5,110	22,558	17,881	15,059
Income tax expense	1,737	1,283	1,959	1,120	1,135	855	1,127	1,318	6,099	4,435	2,910
Net income	4,158	4,107	4,824	3,370	3,072	3,035	3,547	3,792	16,459	13,446	12,149
Less preferred stock dividends and discount accretion	377	450	563	537	490	489	487	485	1,927	1,951	1,922
Net income available to common shareholders	$ 3,781	$ 3,657	$ 4,261	$ 2,833	$ 2,582	$ 2,546	$ 3,060	$ 3,307	$ 14,532	$ 11,495	$ 10,227
Net income per common share, basic and diluted (in Dollars per share)	$ 0.51	$ 0.49	$ 0.57	$ 0.38	$ 0.35	$ 0.34	$ 0.41	$ 0.44	$ 1.94	$ 1.54	$ 1.37
Weighted average common shares outstanding, basic and diluted (in Shares)	7,487	7,485	7,482	7,479	7,477	7,475	7,473	7,470	7,483	7,474	7,457