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Retirement Benefit Plans
3 Months Ended
Mar. 31, 2012
Retirement Benefit Plans [Abstract]  
Retirement Benefit Plans
10. Retirement Benefit Plans
 
Our defined benefit pension plans and postretirement medical plan are described in Note 11 of the 2011 annual report on Form 10-K. We have contributed $921 and $134 during the first quarter of 2012 to our pension plans and to our postretirement medical plan, respectively.
 
The components of the net periodic benefit cost for the three months ended March 31, 2012 and 2011 were as follows:
 
   
Three Months Ended
 
   
March 31
 
   
Pension Benefits
  
Postretirement
 
   
U.S. Plans
  
Non-U.S. Plans
  
Medical Benefits
 
   
2012
  
2011
  
2012
  
2011
  
2012
  
2011
 
Service cost
 $165  $166  $33  $25  $35  $33 
Interest cost
  478   513   130   122   140   162 
Expected return on plan assets
  (571)  (580)  (117)  (108)  -   - 
Amortization of net actuarial loss
  286   26   -   -   17   15 
Amortization of prior service cost
  97   137   38   39   (145)  (145)
Foreign currency
  -   -   (22)  61   -   - 
Net periodic cost
 $455  $262  $62  $139  $47  $65