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Pensions
 3 Months Ended
Mar. 31, 2024
Pensions [Abstract]  
Pensions

11.  Pensions
 
Components of Net Periodic Pension Cost

 
  
Three Months
Ended March 31
  
 
  
2024
    
2023
  
             
Service cost
  
$
159
    
$
149
  
Interest cost
    
463
      
469
  
Expected return on plan assets
    
(791
)
    
(903
)
Amortization of prior service cost
    
(3
)
    
(3
)
Rate-regulated adjustment
    
561
      
801
  
Net periodic pension expense
  
$
389
    
$
513
  

Pension service cost is recorded in operating expenses.  All other components of net periodic pension cost are recorded as other pension costs in other income (expenses).

Employer Contributions
 
The Company previously disclosed in its financial statements for the year ended December 31, 2023 that it expected to contribute $1,556 to its pension plans in 2024.  For the three months ended March 31, 2024, contributions of $389 have been made.  The Company expects to contribute the remaining $1,167 during the final three quarters of 2024.