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Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2019
Retirement Plans [Abstract]  
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
June 30,
    
Six Months Ended
June 30,
  
(In thousands)
  
2019
    
2018
    
2019
    
2018
  
                         
Service cost
  
$
359
    
$
366
    
$
718
    
$
734
  
Interest cost
    
319
      
286
      
639
      
575
  
Expected return on plan assets
    
(229
)
    
(241
)
    
(460
)
    
(486
)
Recognized actuarial gain
    
(39
)
    
(27
)
    
(78
)
    
(54
)
                                 
Total defined benefit expense
  
$
410
    
$
384
    
$
819
    
$
769