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Pension Benefit and Other Postretirement Benefit Plans
3 Months Ended
Mar. 31, 2012
Pension Benefit and Other Postretirement Benefit Plans
Note 9 – Pension Benefit and Other Postretirement Benefit Plans

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the periods indicated are:
 
(Dollars in thousands)
                       
   
Pension Benefits
   
Retirement Health and Life Insurance Benefits
 
   
Three Months Ended
   
Three Months Ended
 
Change in benefit obligation:
 
March 31, 2012
   
March 31, 2011
   
March 31, 2012
   
March 31, 2011
 
                         
Service cost
  $ 1,189     $ 1,060     $ 182     $ 176  
Interest cost
    2,118       2,116       88       97  
Expected return on plan assets
    (2,408 )     (2,591 )     -       -  
Amortization of prior service cost
    116       150       (113 )     (157 )
Amortization of net loss
    1,349       553       115       81  
Special benefits acceleration
    -       -       -       -  
Special termination benefit
    -       -       2,300       -  
Net periodic benefit cost
  $ 2,364     $ 1,288     $ 2,572     $ 197  
 
As a result of the early retirement program that we offered in the first quarter of 2012, we incurred a $2.3 million special termination benefit associated with our retirement health and life insurance benefits program, as we extended eligibility in the benefits to certain individuals who participated in the early retirement program.
 
Employer Contributions
We made $10.0 million in voluntary contributions to our qualified defined benefit pension plans during the first quarter of 2012.  For the first quarter of 2011, we did not have any voluntary contributions.

We made no payments under our non-qualified defined benefit pension plan in the first quarter of 2012 and only de minimis payments were made in the first quarter of 2011.