Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Income tax on unrealized holding during the period	$ 2,068,136	$ (2,040,125)	$ 4,364,683	$ (1,604,947)
Income tax expense on reclassification adjustment for gains	$ 250,312	$ 136,662	$ 415,141	$ 502,944