Pension And Other Postretirement Benefit Plans (Schedule Of Amounts Recognized In Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Accumulated Other Comprehensive Income Loss Actuarial Gain Loss	$ (127,206)	$ (117,627)
Transition assets	101	237
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	(127,105)	(117,390)
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	$ 1,471	$ 1,133