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Employee Benefit Plans And Other Postretirement Benefits (Tables)
9 Months Ended
Sep. 30, 2011
Net Pension Costs [Member]
 
Components Of Net Periodic Benefit Costs
     Three  Months
Ended

September 30,
    Nine Months
Ended

September  30,
 
     2011     2010     2011     2010  
(In thousands)                         

Components of Net Pension Costs

        

Service cost for benefits earned during the year

   $ 4,952      $ 4,579      $ 14,856      $ 13,737   

Interest cost on accumulated benefit obligation

     3,368        3,023        10,105        9,068   

Expected return on assets

     (3,386     (2,802     (10,158     (8,406

Net amortization of unrecognized amounts

     1,549        1,483        4,645        4,449   
  

 

 

   

 

 

   

 

 

   

 

 

 

Net pension costs

   $ 6,483      $ 6,283      $ 19,448      $ 18,848   
  

 

 

   

 

 

   

 

 

   

 

 

 
Net Postretirement Costs [Member]
 
Components Of Net Periodic Benefit Costs
     Three  Months
Ended

September 30,
    Nine Months
Ended

September  30,
 
         2011              2010         2011      2010  
(In thousands)                           

Components of Net Postretirement Costs

          

Service cost for benefits earned during the year

   $ 400       $ 350      $ 1,199       $ 1,049   

Interest cost on accumulated benefit obligation

     297         283        892         848   

Net amortization of unrecognized amounts

     8         (19     25         (56
  

 

 

    

 

 

   

 

 

    

 

 

 

Net postretirement costs

   $ 705       $ 614      $ 2,116       $ 1,841