Retirement Agreements and Other Postretirement Benefit Plan Components of Net Periodic Benefit Cost (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Service cost - benefits earned during the year	$ 10,180	$ 16,748	$ 14,667
Interest cost on the projected benefit obligation	35,123	30,772	30,472
(Accretion) amortization of unrecognized prior service cost	0	4,390	2,217
Amortization of unrecognized losses	8,941	3,514	0
Net periodic benefits costs	$ 54,244	$ 55,424	$ 47,356