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Pension And Postretirement Benefits (Summary Of Estimated Future Benefit Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Pension Benefits [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2013 $ 36,089
2014 38,174
2015 39,329
2016 41,294
2017 43,085
2018-2022 243,061
Total payments 441,032
Postretirement Benefits [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2013 1,208
2014 1,199
2015 1,204
2016 1,202
2017 1,224
2018-2022 5,494
Total payments $ 11,531