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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2016
Retirement Plans [Abstract]  
Components of Annual Benefit Cost
The Company’s components of annual benefit cost for the defined benefit plans for the periods presented are as follows:

  
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
(In thousands)
 
2016
  
2015
  
2016
  
2015
 
             
Service cost
 
$
502
  
$
654
  
$
1,508
  
$
1,977
 
Interest cost
  
414
   
467
   
1,259
   
1,412
 
Expected return on plan assets
  
(286
)
  
(321
)
  
(883
)
  
(967
)
Amortization of actuarial loss
  
54
   
72
   
162
   
219
 
Settlement expense
  
-
   
506
   
-
   
506
 
Total defined benefit expense
 
$
684
  
$
1,378
  
$
2,046
  
$
3,147