Employee Benefit Plans - Schedule of Options Exercised (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Number of options exercised (shares)	22,600	29,618	77,607	46,682
Total intrinsic value of options exercised	$ 411,738	$ 337,230	$ 1,237,391	$ 484,920
Cash received from options exercised	101,601	135,837	391,958	270,792
Tax deduction realized from options	$ 115,740	$ 137,758	$ 347,831	$ 198,089