Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Cost Recognized In Accumulated And Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	$ (12,432)
Net actuarial loss	668,285
Amounts included in other comprehensive income, net of tax	655,853
Pension And SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	3,489
Net actuarial loss	577,140
Amounts included in other comprehensive income, net of tax	580,629
Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	(15,921)
Net actuarial loss	91,145
Amounts included in other comprehensive income, net of tax	$ 75,224