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Note 5 - Retirement Plans
9 Months Ended
Sep. 30, 2012
Pension and Other Postretirement Benefits Disclosure [Text Block]
5.        Retirement Plans

The following table provides the components of net periodic benefit cost for our pension plans for the three-month and nine-month periods ended September 30, 2012 and 2011, respectively (in thousands):

   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
2012
   
2011
   
2012
   
2011
 
Service cost
  $ 1,243     $ 568     $ 3,538     $ 2,701  
Interest cost
    899       996       2,559       2,502  
Expected return on plan assets
    (739 )     (780 )     (2,104 )     (2,014 )
Loss amortization
    624       496       1,775       805  
Net periodic benefit cost
  $ 2,027     $ 1,280     $ 5,768     $ 3,994  

During the nine-month period ended September 30, 2012, we contributed $5.4 million to our pension plans. During the remainder of the year ending December 31, 2012, we expect to contribute an additional $1.3 million to our pension plans.