CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net income (loss):	$ 70,471,167	$ 57,726,201	$ 41,883,881
Other comprehensive income, net of tax:
(Decrease) increase in net gains on securities available-for-sale, net of deferred tax expense (benefit)	11,900,309	(22,156,995)	(2,798,700)
(Decrease) increase in fair value of cash flow hedge, net of tax expense	(3,699,569)	4,013,570	0
Net gain on sale of investment securities reclassified out of comprehensive income into net income, net of tax	(17,758)	891,177	(1,306,923)
Total comprehensive income (loss)	$ 78,654,149	$ 40,473,953	$ 37,778,258