Retirement Agreements and Other Postretirement Benefit Plan Effects on Net Periodic Postretirement Benefit Cost and Accumulated Postretirement Benefit Obligation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
One-Percent Point Increase: Effect on the service cost component	$ 4,386
One-Percent Point Increase: Effect on interest cost	6,819
One-Percent Point Increase: Total effect on the net periodic postretirement benefit cost	11,205
One-Percent Point Decrease: Effect on the service cost component		(3,344)
One-Percent Point Decrease: Effect on interest cost		(5,267)
One-Percent Point Decrease: Total effect on the net periodic postretirement benefit cost		(8,611)
One-Percent Point Increase: Effect on those currently receiving benefits (retirees and spouses)	0
One-Percent Point Increase: Effect on active fully eligible	75,677
One-Percent Point Increase: Effect on actives not yet eligible	94,798
One-Percent Point Increase: Total effect on the accumulated postretirement benefit obligation	170,475
One-Percent Point Decrease: Effect on those currently receiving benefits (retirees and spouses)		0
One-Percent Point Decrease: Effect on active fully eligible		(59,919)
One-Percent Point Decrease: Effect on actives not yet eligible		(72,309)
One-Percent Point Decrease: Total effect on the accumulated postretirement benefit obligation		$ (132,228)