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Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
Tables 10.1 and 10.2 provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three and six months ended June 30, 2025 and 2024.
Components of net periodic benefit cost
Table
10.1
Three Months Ended June 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $235 $417 
Interest cost3,297 3,247 311 375 
Expected return on plan assets(3,442)(3,644)(2,911)(2,494)
Amortization of:
Net actuarial losses (gains)546 523 (693)(380)
Prior service cost (credit)87 86 117 453 
Cost of settlements and curtailments3,680 — — — 
Net periodic benefit cost (benefit)$4,168 $212 $(2,941)$(1,629)
Components of net periodic benefit cost
Table10.2
Six Months Ended June 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $469 $834 
Interest cost6,596 6,494 622 750 
Expected return on plan assets(6,884)(7,288)(5,822)(4,988)
Amortization of:
Net actuarial losses (gains)1,092 1,046 (1,385)(760)
Prior service cost (credit)173 172 235 906 
Cost of settlements and curtailments3,680 — — — 
Net periodic benefit cost (benefit)$4,657 $424 $(5,881)$(3,258)