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Pension And Postretirement Benefits (Schedule Of Amounts Recognized In Consolidated Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]    
Accrued pension and postretirement benefits $ (233,603) $ (178,382)
Pension Benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other assets 52,304 59,891
Current liabilities (817) (1,169)
Accrued pension and postretirement benefits (222,171) (167,068)
Amounts recognized in the Consolidated Balance Sheets (170,684) (108,346)
Postretirement Benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities (1,188) (1,248)
Accrued pension and postretirement benefits (11,432) (11,314)
Amounts recognized in the Consolidated Balance Sheets $ (12,620) $ (12,562)