Accumulated Other Comprehensive Loss (Summary Of Changes In Accumulated Other Comprehensive Loss) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ (2,251,858)	$ (2,315,532)	$ (2,422,109)	$ (2,442,997)
Amounts reclassified from AOCL	170,252	127,465	340,503	254,930
Balance	(2,081,606)	(2,188,067)	(2,081,606)	(2,188,067)
Prior Service Cost [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(30,569)	(48,038)	(34,936)	(52,405)
Amounts reclassified from AOCL	4,368	4,368	8,735	8,735
Balance	(26,201)	(43,670)	(26,201)	(43,670)
Net Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,221,289)	(2,267,494)	(2,387,173)	(2,390,592)
Amounts reclassified from AOCL	165,884	123,097	331,768	246,195
Balance	$ (2,055,405)	$ (2,144,397)	$ (2,055,405)	$ (2,144,397)