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Postretirement Benefits
9 Months Ended
Sep. 30, 2011
Notes to Financial Statements [Abstract] 
Benefits
8. Benefits

 

The following table sets forth the components of net periodic benefit cost of the Company's postretirement benefit plan for the periods presented.

  Three Months Ended September 30, Nine Months Ended September 30,
  2011 2010 2011 2010
             
  (In thousands)
             
Service cost$ 637 $ 575 $ 1,912 $ 1,725
Interest cost  950   872   2,850   2,616
Expected return on plan assets  (950)   (837)   (2,850)   (2,512)
Prior service credit amortization  (522)   (522)   (1,566)   (1,566)
Net periodic benefit cost$ 115 $ 88 $ 346 $ 263