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PENSION BENEFITS (Tables)
6 Months Ended
Jun. 30, 2011
Pension Benefits [Abstract]  
Components of Net Periodic Benefit Cost
The following table presents the components of net periodic benefit costs for the periods indicated:
 
   
Three months ended
  
Six months ended
 
   
June 30,
  
June 30,
 
   
2011
  
2010
  
2011
  
2010
 
   
(In thousands)
 
Service cost
 $2,082  $1,921  $4,164  $3,724 
Interest cost
  2,028   1,931   4,056   3,838 
Expected return on assets
  (3,713)  (3,529)  (7,426)  (7,016)
Amortization of unrecognized transition amount
  5   3   10   8 
Recognized prior service cost
  50   85   100   170 
Recognized net loss
  578   564   1,156   1,108 
Net periodic benefit costs
 $1,030  $975  $2,060  $1,832