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Pension and Other Postretirement Benefits
6 Months Ended
Jun. 30, 2011
Pension and Other Postretirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
 
13.   Pension and Other Postretirement Benefits
 
Net periodic cost for the Corporation’s pension and other postretirement benefits included the following components:
 
                                 
    Quarter Ended  
          Other
 
          Postretirement
 
    Pension Benefits     Benefits  
    June 30,
    June 30,
    June 30,
    June 30,
 
    2011     2010     2011     2010  
 
(In thousands)
                               
Service cost
  $ 1,027     $ 2,389     $ 3     $  
Interest cost
    7,358       7,213       193       204  
Expected return on plan assets
    (8,627 )     (8,186 )            
Plan net loss (gain)
    1,615       3,309       (4 )     (136 )
Prior service cost (gain)
    175       282       (63 )     (63 )
Transition obligation (asset)
    (5 )     (4 )     191       191  
Curtailment/settlement loss (gain)
    995       1,014              
                                 
Net periodic benefit cost
  $ 2,538     $ 6,017     $ 320     $ 196  
                                 
 
                                 
    Six Months Ended  
          Other
 
          Postretirement
 
    Pension Benefits     Benefits  
    June 30,
    June 30,
    June 30,
    June 30,
 
    2011     2010     2011     2010  
 
(In thousands)
                               
Service cost
  $ 2,066     $ 5,277     $ 3     $ 2  
Interest cost
    14,702       14,430       396       459  
Expected return on plan assets
    (17,151 )     (16,394 )            
Plan net loss (gain)
    3,211       6,154       54       (62 )
Prior service cost (gain)
    458       564       (126 )     (126 )
Transition obligation (asset)
    (10 )     (8 )     383       383  
Curtailment/settlement loss (gain)
    995       1,213              
                                 
Net periodic benefit cost
  $ 4,271     $ 11,236     $ 710     $ 656  
                                 
 
 
Contributions to our qualified pension plans during the six months ended June 30, 2011 and 2010 were not significant. We expect required contributions to our qualified pension plans during the remainder of 2011 to be minimal.