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Retirement Plans And Other Postretirement Benefits (Schedule Of Amounts Recognized Before Related Deferred Income Taxes In Accumulated Other Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Prior service cost (benefit) $ 270 $ (887) $ (1,890)
Net actuarial (gain) loss 116,519 167,009 148,364
Other Post-Retirement Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Prior service cost (benefit) 0 0 0
Net actuarial (gain) loss $ (1,773) $ (855) $ (1,401)