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Pensions
3 Months Ended
Mar. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Pensions
4.
Pensions
 

Components of Net Periodic Pension Cost
 
 
 
Three Months Ended
March 31
 
 
 
2013
  
2012
 
 
 
  
 
Service cost
 
$
297
  
$
263
 
Interest cost
  
320
   
322
 
Expected return on plan assets
  
(411
)
  
(360
)
Amortization of actuarial loss
  
174
   
160
 
Amortization of prior service cost
  
3
   
4
 
Rate-regulated adjustment
  
15
   
9
 
Net periodic pension expense
 
$
398
  
$
398
 

Employer Contributions

The Company previously disclosed in its financial statements for the year ended December 31, 2012 that it expected to contribute $1,593 to its pension plans in 2013.  As of March 31, 2013, contributions of $1,593 had been made.  At this time, the Company does not expect to contribute any additional amount during the remainder of 2013.