Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,318,648)	$ 8,584,654	$ 2,786,170	$ 20,433,567
Unrealized gain on securities:
Unrealized holding gain during the period, net of income tax expense	1,069,259	3,840,822	3,072,872	8,105,840
Reclassification adjustment for gains included in net income, net of income tax expense	(713,249)	(464,865)	(2,370,083)	(770,977)
Other comprehensive income	356,010	3,375,957	702,789	7,334,863
Comprehensive (loss) income	$ (1,962,638)	$ 11,960,611	$ 3,488,959	$ 27,768,430