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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2021
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
September 30,
    
Nine Months Ended
September 30,
  
(In thousands)
  
2021
    
2020
    
2021
    
2020
  
Service cost
  
$
435
    
$
400
    
$
1,308
    
$
1,196
  
Interest cost
    
212
      
256
      
638
      
763
  
Expected return on plan assets
    
(184
)
    
(209
)
    
(553
)
    
(622
)
Recognized actuarial loss
    
69
      
16
      
207
      
47
  
Total defined benefit expense
  
$
532
    
$
463
    
$
1,600
    
$
1,384