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Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2014
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 and nine month periods ended September 30, 2014 and 2013 for its pension and other postretirement benefit plans:

  
For the three months ended September 30,
 
  
Pension Benefits
  
Other Postretirement Benefits
 
(dollars in thousands)
 
2014
  
2013
  
2014
  
2013
 
         
Service cost
  
8
   
17
   
46
   
12
 
Interest cost
  
359
   
318
   
99
   
25
 
Expected return on plan assets
  
(660
)
  
(547
)
  
(166
)
  
(122
)
Amortization of net (gain) loss
  
-
   
129
   
(77
)
  
(12
)
Amortization of prior service credit
  
-
   
-
   
239
   
(66
)
Net periodic benefit
  
(293
)
  
(83
)
  
141
   
(163
)

  
For the nine months ended September 30,
 
  
Pension Benefits
  
Other Postretirement Benefits
 
(dollars in thousands)
 
2014
  
2013
  
2014
  
2013
 
         
Service cost
  
44
   
51
   
75
   
38
 
Interest cost
  
1,031
   
955
   
163
   
76
 
Expected return on plan assets
  
(1,878
)
  
(1,642
)
  
(504
)
  
(371
)
Amortization of net (gain) loss
  
-
   
387
   
(223
)
  
(37
)
Amortization of prior service credit
  
-
   
-
   
149
   
(197
)
Net periodic benefit
  
(803
)
  
(249
)
  
(340
)
  
(491
)