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Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2013
Benefit Plans [Abstract]  
Components of Company's net periodic cost
The table below outlines the components of the Company's net periodic benefit recognized during the three month periods ended March 31, 2013 and 2012 for its pension and other postretirement benefit plans:
 
   
For the three months ended March 31,
 
   
Pension Benefits
  
Other Postretirement Benefits
 
(dollars in thousands)
 
2013
  
2012
  
2013
  
2012
 
              
Service cost
 $14   12   12   8 
Interest cost
  315   365   24   26 
Expected return on plan assets
  (498)  (474)  (123)  (113)
Amortization of net loss (gain)
  147   102   (15)  (5)
Amortization of prior service credit
  -   -   (66)  (66)
Net periodic expense (benefit)
 $(22)  5   (168)  (150)