Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Cost Expected To Be Recognized) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	$ 31,731
Pension And SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	29,485
Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	2,246
Prior Service Cost (Credit) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	(564)
Prior Service Cost (Credit) [Member] | Pension And SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	1,862
Prior Service Cost (Credit) [Member] | Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	(2,426)
Net Actuarial Loss [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	32,295
Net Actuarial Loss [Member] | Pension And SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	27,623
Net Actuarial Loss [Member] | Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts expected to be recognized in net periodic benefit cost, net of tax	$ 4,672