Note 20 - Parent Company Only Financial Statements (Details) - Condensed Statements of Operations (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
	May 14, 2013	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
Condensed Income Statements, Captions [Line Items]
Total interest income		$ 22,028,027	$ 21,796,642	$ 21,105,376	$ 21,035,211	$ 21,198,832	$ 21,996,243	$ 20,139,401	$ 18,537,482
Bargain purchase gain on Community National acquisition	1,841,385											1,841,385
Total income										106,962,556		107,685,786		93,997,168
Interest expense		4,246,814	4,321,311	4,140,033	4,185,970	4,303,100	4,685,907	4,431,349	4,346,165	16,894,128		17,766,521		19,726,613
Salaries and employee benefits										40,337,055		37,510,318		33,274,509
Acquisition and data conversion costs												2,353,162
Income tax benefit		(344,497)	(1,028,876)	(1,193,312)	(472,285)	(608,138)	(1,038,793)	(1,857,091)	(1,113,920)	(3,038,970)		(4,617,942)		(4,534,601)
Net income		2,992,821	4,062,665	4,007,836	3,889,215	3,815,926	3,811,944	4,045,231	3,265,144	14,952,537		14,938,245		12,617,767
Bank Subsidiaries [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Equity in net income of subsidiaries										20,333,194		20,499,070		17,206,086
Nonbank Subsidiaries [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Equity in net income of subsidiaries										32,675		31,540		168,934
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Total interest income										40,815		43,476		57,136
Bargain purchase gain on Community National acquisition												1,841,385
Other *										7,486	[1]	7,942	[1]	657,733	[1]
Total income										20,414,170		22,423,413		18,089,889
Interest expense										1,986,752		1,714,814		1,408,948
Salaries and employee benefits										4,671,719		4,765,762		4,717,609
Professional fees										1,100,714		977,571		988,306
Acquisition and data conversion costs												2,037,684
Other-than-temporary impairment losses on securities														62,400
Other										635,081		642,044		760,618
Total expenses										8,394,266		10,137,875		7,937,881
Income before income tax benefit										12,019,904		12,285,538		10,152,008
Income tax benefit										2,932,633		2,652,707		2,465,759
Net income										$ 14,952,537		$ 14,938,245		$ 12,617,767

[1] The year ended December 31, 2012 includes pre-tax gain of approximately $580 thousand on the sale of a 2.25% equity interest in a company providing data processing services to merchant credit card acquiring businesses.