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Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2013
Benefit Plans [Abstract]  
Components of Company's net periodic cost
The table below outlines the components of the Company's net periodic expense (benefit) recognized during the three month and nine month periods ended September 30, 2013 and 2012 for its pension and other postretirement benefit plans:
 
 
 
For the three months ended September 30,
 
 
 
Pension Benefits
  
Other Postretirement Benefits
 
(dollars in thousands)
 
2013
  
2012
  
2013
  
2012
 
 
 
  
  
  
 
Service cost
 
$
17
   
11
   
12
   
7
 
Interest cost
  
318
   
364
   
25
   
26
 
Expected return on plan assets
  
(547
)
  
(473
)
  
(122
)
  
(113
)
Amortization of net loss (gain)
  
129
   
103
   
(12
)
  
(4
)
Amortization of prior service credit
  
-
   
-
   
(66
)
  
(66
)
Net periodic expense (benefit)
 
$ 
(83
)
  
5
   
(163
)
  
(150
)

 
 
For the nine months ended September 30,
 
 
 
Pension Benefits
  
Other Postretirement Benefits
 
(dollars in thousands)
 
2013
  
2012
  
2013
  
2012
 
 
 
  
  
  
 
Service cost
 
$
51
   
35
   
38
   
23
 
Interest cost
  
955
   
1,094
   
76
   
77
 
Expected return on plan assets
  
(1,642
)
  
(1,421
)
  
(371
)
  
(338
)
Amortization of net loss (gain)
  
387
   
307
   
(37
)
  
(14
)
Amortization of prior service credit
  
-
   
-
   
(197
)
  
(197
)
Net periodic expense (benefit)
 
$ 
(249
)
  
15
   
(491
)
  
(449
)