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Pension Plan (Tables)
6 Months Ended
Jun. 30, 2013
Pension Plan [Abstract]  
Components of Net Pension Cost
Net periodic defined benefit pension expense for the three and six month periods ended June 30, 2013 and 2012 included the following components:
 
 
 
Three months ended
  
Six months ended
 
 
 
June 30,
  
June 30,
 
(In thousands)
 
2013
  
2012
  
2013
  
2012
 
Service cost
 
$
19
  
$
68
  
$
37
  
$
136
 
Interest cost
  
133
   
144
   
266
   
296
 
Amortization of prior service cost
  
22
   
22
   
45
   
44
 
Amortization of actuarial loss
  
123
   
95
   
245
   
191
 
Net periodic benefit cost
 
$
297
  
$
329
  
$
593
  
$
667