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Pension And Other Post-Retirement Benefits (Tables)
3 Months Ended
Mar. 31, 2013
Pension And Other Post-Retirement Benefits [Abstract]  
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs
    Pension     Other Post-Retirement  
    Benefits for Three Months     Benefits for Three Months  
    Ended March 31     Ended March 31  
(In Thousands)   2013     2012     2013     2012  
Service cost $ (870 ) $ (858 ) $ (18 ) $ (13 )
Interest cost   (3,106 )   (3,289 )   (89 )   (100 )
Expected return on plan assets   4,329     4,811     -     -  
Amortization of prior service costs, gains or                        
losses and net transition asset   (3,690 )   (2,626 )   41     53  
Net periodic benefit cost $ (3,337 ) $ (1,962 ) $ (66 ) $ (60 )