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Retirement Plans (Tables)
 3 Months Ended
Mar. 31, 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
March 31,
  
(In thousands)
  
2021
    
2020
  
Service cost
  
$
436
    
$
400
  
Interest cost
    
212
      
256
  
Expected return on plan assets
    
(184
)
    
(209
)
Recognized actuarial loss
    
69
      
16
  
Total defined benefit expense
  
$
533
    
$
463