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Retirement Plans (Tables)
 3 Months Ended
Mar. 31, 2017
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
March 31,
 
(In thousands)
 
2017
  
2016
 
       
Service cost
 
$
461
  
$
503
 
Interest cost
  
355
   
420
 
Expected return on plan assets
  
(255
)
  
(297
)
Amortization of actuarial (gain) loss
  
(21
)
  
53
 
         
Total defined benefit expense
 
$
540
  
$
679