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Savings Plans, Pension Plans and Other Postretirement Employee Benefits Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Amounts Recognized in AOCI on Consolidated Balance Sheet) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net amount recognized $ (98,720) $ (140,898)    
Pension Plans, Defined Benefit [Member]
       
Net Loss 115,404 159,429    
Prior Service Cost (Credit) 1,763 2,238    
Net amount recognized 117,167 161,667 158,883 130,445
Other Postretirement Benefit Plans, Defined Benefit [Member]
       
Net Loss 16,490 20,090    
Prior Service Cost (Credit) (34,937) (40,859)    
Net amount recognized $ (18,447) $ (20,769) $ (18,001) $ (16,690)