Note 19 - Parent Company Only Financial Statements (Details) - Condensed Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 41,950,790	$ 61,568,446
Interest-bearing deposits at financial institutions	33,044,917	22,359,490
Securities available for sale, at fair value	551,758,458	530,159,986
Premises and equipment, net	36,755,364	31,262,390
Other assets	23,873,150	13,732,795
Total assets	2,394,952,924	2,093,730,492	1,966,610,054
Liabilities:
Other borrowings	142,448,362	138,239,762
Other liabilities	37,003,742	31,424,848
Total liabilities	2,247,376,144	1,953,296,671
Stockholders' Equity:
Preferred stock	29,867	54,867
Common stock	8,005,708	5,039,448
Additional paid-in capital	90,154,528	78,912,791
Retained earnings	64,637,173	53,326,542
Accumulated other comprehensive income (loss)	(13,643,986)	4,706,683
Treasury stock	(1,606,510)	(1,606,510)
Total liabilities and stockholders' equity	2,394,952,924	2,093,730,492
Bank Subsidiaries [Member] | Parent Company [Member]
Assets
Investment in subsidiaries	187,410,269	182,465,733
Nonbank Subsidiaries [Member] | Parent Company [Member]
Assets
Investment in subsidiaries	1,396,632	1,202,791
Parent Company [Member]
Assets
Cash and due from banks	7,212,584	1,072,434
Interest-bearing deposits at financial institutions	187,401	185,113
Securities available for sale, at fair value	1,644,663	1,406,876
Premises and equipment, net	3,243,575	3,318,757
Other assets	8,709,546	7,720,933
Total assets	209,804,670	197,372,637
Liabilities:
Other borrowings	14,104,323	10,077,769
Junior subordinated debentures	40,289,830	36,085,000
Other liabilities	7,833,737	10,776,047
Total liabilities	62,227,890	56,938,816
Stockholders' Equity:
Preferred stock	29,867	54,867
Common stock	8,005,708	5,039,448
Additional paid-in capital	90,154,528	78,912,791
Retained earnings	64,637,173	53,326,542
Accumulated other comprehensive income (loss)	(13,643,986)	4,706,683
Treasury stock	(1,606,510)	(1,606,510)
Total stockholders' equity	147,576,780	140,433,821
Total liabilities and stockholders' equity	$ 209,804,670	$ 197,372,637