Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In The Consolidated Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Payroll and benefit-related liabilities	$ (64,386)	$ (71,418)
Pension and postretirement benefit liabilities	(194,984)	(141,769)
Accumulated other comprehensive income (loss)	134,548	95,746
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Payroll and benefit-related liabilities	(1,813)	(2,012)
Pension and postretirement benefit liabilities	(148,657)	(90,179)
Accumulated other comprehensive income (loss)	204,508	143,637
Amounts recognized in balance sheet	54,038	51,446
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Payroll and benefit-related liabilities	(3,181)	(3,932)
Pension and postretirement benefit liabilities	(46,327)	(51,590)
Accumulated other comprehensive income (loss)	6,854	6,295
Amounts recognized in balance sheet	$ (42,654)	$ (49,227)