Pension And Postretirement Benefits (Schedule Of Amounts Recognized In Accumulated Other Comprehensive (Income) Loss) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 290,417	$ 239,624
Prior service cost (credit)	141	1,036
Transition asset	(2)	(3)
Amounts recognized in accumulated other comprehensive (income) loss total	289,556	240,657
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(707)	(1,518)
Prior service cost (credit)	(1,127)	(1,362)
Amounts recognized in accumulated other comprehensive (income) loss total	$ (1,834)	$ (2,880)