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Pensions (Tables)
3 Months Ended
Mar. 31, 2023
Pensions [Abstract]  
Components of Net Periodic Pension Cost
Components of Net Periodic Pension Cost

 
 
Three Months
Ended March 31
 
 
 
2023
   
2022
 
             
Service cost
 
$
149
   
$
256
 
Interest cost
   
469
     
334
 
Expected return on plan assets
   
(903
)
   
(1,055
)
Amortization of prior service cost
   
(3
)
   
(3
)
Rate-regulated adjustment
   
801
     
1,043
 
Net periodic pension expense
 
$
513
   
$
575