CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 9,106,387	$ 8,485,633	$ 16,821,444	$ 15,429,355
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on investments available for sale, net of tax	(22,123)	(17,517)	24,224	(13,774)
Total other comprehensive income (loss), net of tax	(22,123)	(17,517)	24,224	(13,774)
Comprehensive income	$ 9,084,264	$ 8,468,116	$ 16,845,668	$ 15,415,581