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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2023
Employee Benefit Plans [Abstract]  
Schedule of components of net benefit cost
   (In Thousands)
   Pension Benefits  Other Benefits
   Three Months Ended June 30,
   2023  2022  2023  2022
             
Service Cost  $388   $591   $98   $200 
Interest Cost   1,067    761    402    331 
Expected Return on Assets   (1,466)   (1,760)   (771)   (887)
Amortization of Unrecognized Losses   164    418    (48)   — 
Net Periodic Benefit Cost (Benefit)*  $153   $10   $(319)  $(356)
                     
   (In Thousands)
   Pension Benefits  Other Benefits
   Six Months Ended June 30,
   2023  2022  2023  2022
Service Cost  $776   $1,181   $196   $399 
Interest Cost   2,134    1,521    804    663 
Expected Return on Assets   (2,932)   (3,520)   (1,542)   (1,773)
Amortization of Unrecognized Losses   328    837    (96)   — 
Net Periodic Benefit Cost (Benefit)*  $306   $19   $(638)  $(711)

*Service cost is included Operations and Maintenance expense on the consolidated statements of income; all other amounts are included in Other Income (Expense), net.