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Pensions
 6 Months Ended
Jun. 30, 2023
Pensions [Abstract]  
Pensions

11.  Pensions

Components of Net Periodic Pension Cost

 
Three Months
Ended June 30
    
Six Months
Ended June 30
  
   
2023
    
2022
    
2023
    
2022
  
                         
Service cost
  
$
150
    
$
256
    
$
299
    
$
512
  
Interest cost
    
469
      
334
      
938
      
668
  
Expected return on plan assets
    
(903
)
    
(1,054
)
    
(1,806
)
    
(2,109
)
Amortization of prior service cost
    
(3
)
    
(3
)
    
(6
)
    
(6
)
Rate-regulated adjustment
    
676
      
1,042
      
1,477
      
2,085
  
Net periodic pension expense
  
$
389
    
$
575
    
$
902
    
$
1,150
  

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, 2022 that it expected to contribute $1,680 to its pension plans in 2023.  For the six months ended June 30, 2023, contributions of $902 have been made.  The Company expects to contribute the remaining $778 during the final two quarters of 2023.