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Defined Benefit Post-retirement Plans (Tables)
9 Months Ended
Sep. 30, 2017
Defined Benefit Post-retirement 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 September 30,
  
Three months ended September 30,
 
Components of net periodic (benefit) cost:
 
2017
  
2016
  
2017
  
2016
 
Service cost
 
$
329
  
$
534
  
$
3
  
$
3
 
Interest cost
  
1,043
   
1,050
   
88
   
89
 
Expected return on plan assets
  
(1,976
)
  
(1,857
)
  
-
   
-
 
Net amortization
  
454
   
504
   
26
   
15
 
Total (benefit) cost
 
$
(150
)
 
$
231
  
$
117
  
$
107
 
 
 
 
Pension Benefits
  
Other Benefits
 
  
Nine months ended September 30,
  
Nine months ended September 30,
 
Components of net periodic (benefit) cost:
 
2017
  
2016
  
2017
  
2016
 
Service cost
 
$
1,133
  
$
1,654
  
$
9
  
$
10
 
Interest cost
  
3,127
   
3,151
   
259
   
277
 
Expected return on plan assets
  
(5,946
)
  
(5,527
)
  
-
   
-
 
Net amortization
  
1,284
   
1,471
   
66
   
73
 
Total (benefit) cost
 
$
(402
)
 
$
749
  
$
334
  
$
360