Pension And Postretirement Obligations (Schedule Of Amounts Recognized In Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Income taxes expense (benefit)	$ 654	$ 155	$ (506)	$ (351)	$ 303	$ 1,442	$ (3,044)	$ (885)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial net (loss) gain						(3,824)	(6,013)
Net prior service credit						(178)	(234)
Income taxes expense (benefit)						(2,433)	(2,234)
Total						(1,569)	(4,013)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial net (loss) gain						(168)	(815)
Net prior service credit						507	837
Income taxes expense (benefit)						206	8
Total						$ 133	$ 14