Accumulated Other Comprehensive Loss (Summary Of Changes In Accumulated Other Comprehensive Loss) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (861,911)	$ (2,422,109)
Amounts reclassified from AOCL	4,367	170,251
Balance at end of period	(857,544)	(2,251,858)
Prior Service Cost [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(17,467)	(34,936)
Amounts reclassified from AOCL	4,367	4,367
Balance at end of period	(13,100)	(30,569)
Net Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(844,444)	(2,387,173)
Amounts reclassified from AOCL		165,884
Balance at end of period	$ (844,444)	$ (2,221,289)