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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
Net periodic (benefit) cost for the FPU Pension Plan for the three and six months ended June 30, 2024 and 2023 is set forth in the following table:
Three Months EndedSix Months Ended
June 30,June 30,
2024202320242023
(in thousands)  
Interest cost$599 $633 $1,198 $1,266 
Expected return on plan assets(724)(668)(1,448)(1,336)
Amortization of net loss69 110 138 220 
Total periodic (benefit) cost$(56)$75 $(112)$150 
Amounts Included in Regulatory asset and AOCI [Table Text Block] the three and six months ended June 30, 2024 and 2023.