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Retirement Plans And Other Postretirement Benefits (Reconciliation Of Changes In Benefit Obligations And Plan Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Plan assets at fair value, end of year $ 223,285 $ 209,682  
Amounts recognized in the consolidated balance sheets:      
Prepaid benefit cost 232,705 219,035  
Pension Benefits
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year 302,285 272,436  
Service cost 3,754 3,657 3,361
Interest cost 12,338 13,084 13,024
Effect of actuarial (gains) losses related to the following:      
Discount rate change (26,848) 26,843  
Retirement rate assumptions and mortality table adjustments (144) 0  
Other (3,058) (1,372)  
Benefits paid (13,161) (12,363)  
Benefit obligation, end of year 275,166 302,285 272,436
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Plan assets at fair value, beginning of year 219,035 214,647  
Actual return on plan assets 21,657 14,455  
Employer contributions 5,174 2,296  
Benefits paid (13,161) (12,363)  
Plan assets at fair value, end of year 232,705 219,035 214,647
Funded status of the plans (42,461) (83,250)  
Amounts recognized in the consolidated balance sheets:      
Prepaid benefit cost        
Accrued benefit liability (42,461) (83,250)  
Net amount recognized (42,461) (83,250) (57,800)
Other Post-Retirement Benefits
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year 8,879 8,422  
Service cost 58 58 54
Interest cost 345 385 395
Effect of actuarial (gains) losses related to the following:      
Discount rate change (746) 549  
Retirement rate assumptions and mortality table adjustments    0  
Other (382) (243)  
Benefits paid (296) (292)  
Benefit obligation, end of year 7,858 8,879 8,422
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Plan assets at fair value, beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 296 292  
Benefits paid (296) (292)  
Plan assets at fair value, end of year 0 0 0
Funded status of the plans (7,858) (8,879)  
Amounts recognized in the consolidated balance sheets:      
Prepaid benefit cost        
Accrued benefit liability (7,858) (8,879)  
Net amount recognized $ (7,858) $ (8,879)