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Benefit Plans
6 Months Ended
Jun. 30, 2011
Benefit Plans  
Benefit Plans
(7) Benefit Plans

As discussed in Note 1, "Organization and Summary of Significant Accounting Policies," effective January 1, 2011, we changed our method of recognizing actuarial gains and losses for our defined benefit pension plans and other postretirement benefits. This change was applied retrospectively and all prior period amounts have been adjusted accordingly. See Note 1 for further details.

The components of our consolidated net pension cost are set forth in the following table:

 

     For the
Three Months Ended
June 30,
    For the
Six Months Ended
June 30,
 
    
    
     2010     2011     2010     2011  
     (Dollars in thousands)     (Dollars in thousands)  

Service cost

   $ 164      $ 164      $ 328      $ 328   

Interest cost

     2,446        2,446        4,892        4,892   

Expected return on plan assets

     (2,138     (2,138     (4,276     (4,276

Amortization of prior service cost

     13        13        26        26   
                                

Net Cost

   $ 485      $ 485      $ 970      $ 970   
                                

The components of our consolidated net postretirement cost are set forth in the following table:

 

     For the
Three Months Ended
June 30,
    For the
Six Months Ended
June 30,
 
      
      
     2010     2011     2010     2011  
     (Dollars in thousands)     (Dollars in thousands)  

Service cost

   $ 41      $ 41      $ 82      $ 82   

Interest cost

     440        440        880        880   

Amortization of prior service benefit

     (48     (48     (96     (96
                                

Net Cost

   $ 433      $ 433      $ 866      $ 866