v3.26.1
Employee Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost (Income)
The following table includes the components of net periodic benefit cost (income) related to our defined benefit pension plans and other postretirement benefits for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
Pension Benefits (Pension Plan)Pension Benefits (ESSRP)Postretirement Benefits
(in thousands)202620252026202520262025
Service Cost$815 $876 $— $— $172 $123 
Interest Cost4,306 4,326 458 474 457 403 
Expected Return on Assets(6,241)(6,191)— — — — 
Amortization of Prior Service Cost— — — — (916)(949)
Amortization of Net Actuarial Loss712 335 — — 102 — 
Net Periodic Benefit Cost (Income)$(408)$(654)$458 $474 $(185)$(423)
The following table includes the impact of regulation on the recognition of periodic benefit cost (income) arising from pension and other postretirement benefits for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
(in thousands)20262025
Net Periodic Benefit Cost (Income)$(135)$(603)
Net Amount Amortized Due to the Effect of Regulation679 320 
Net Periodic Benefit Cost (Income) Recognized$544 $(283)