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Defined Benefit Postretirement Plans (Tables)
3 Months Ended
Mar. 31, 2017
Defined Benefit Postretirement Plans [Abstract]  
Components of Net Periodic Pension Benefits and Other Benefit Costs
The components of expense for Pension Benefits and Other Benefits are set forth below):

 
 
Pension Benefits
  
Other Benefits
 
(In thousands)
 
Three months ended March 31,
  
Three months ended March 31,
 
Components of net periodic cost (benefit):
 
2017
  
2016
  
2017
  
2016
 
Service cost
 $
402
  $
560
  $
3
  $
4
 
Interest cost
  
1,042
   
1,051
   
86
   
94
 
Expected return on plan assets
  
(1,985
)
  
(1,835
)
  
-
   
-
 
Net amortization
  
415
   
483
   
20
   
29
 
Total cost (benefit)
 $
(126
)
 $
259
  $
109
  $
127