Pension And Other Postretirement Benefits (Schedule Of Net Periodic Pension And Postretirement Benefit Costs) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 215,000	$ 217,529
Interest cost	496,500	484,356
Less: Expected return on plan assets	713,500	587,363
Amortization of prior service cost	25,250	24,932
Recognized net actuarial loss	204,250	333,408
Unrecognized net loss	0	0
Net periodic expense	227,500	472,862
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	187,500	204,959
Interest cost	366,972	422,470
Less: Expected return on plan assets	0	0
Amortization of prior service cost	(600,000)	(13,332)
Recognized net actuarial loss	163,750	0
Unrecognized net loss	0	173,771
Net periodic expense	$ 118,222	$ 787,868