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Note 4 - Retirement Plans
3 Months Ended
Mar. 31, 2013
Pension and Other Postretirement Benefits Disclosure [Text Block]
4.         Retirement Plans

The following table provides the components of net periodic benefit cost for our pension plans for the three- month periods ended March 31, 2013 and 2012, respectively (in thousands):

   
Three Months Ended March 31,
 
   
2013
   
2012
 
             
Service cost
  $ 1,325     $ 1,147  
Interest cost
    917       830  
Expected return on plan assets
    (830 )     (682 )
Loss amortization
    742       576  
Net periodic benefit cost
  $ 2,154     $ 1,871  

During the three months ended March 31, 2013, we contributed $1.5 million to our pension plans.  During the remainder of 2013, we expect to contribute an additional $1.6 million to $6.5 to our pension plans.