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Benefit Plans
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
We have a non-contributory defined benefit pension plan, as well as a supplemental executive retirement plan that covered eligible employees through December 31, 2022. Effective January 1, 2023, these plans were frozen (no future benefits will be accrued for participants due to employment and no new participants will be added). Participants in these plans were fully vested in their benefits as of December 31, 2022. We also offer benefits for retired domestic employees and their eligible spouses and dependents under a postretirement benefit plan. Participation in this plan is limited to eligible employees that participated in the defined benefit pension plan.
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 nine months ended September 30, 2025 and 2024.
Components of net periodic benefit cost
Table
10.1
Three Months Ended September 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $234 $417 
Interest cost3,299 3,247 311 376 
Expected return on plan assets(3,443)(3,644)(2,911)(2,493)
Amortization of:
Net actuarial losses (gains)547 522 (692)(382)
Prior service cost (credit)86 87 118 454 
Cost of settlements and curtailments1,284 — — — 
Net periodic benefit cost (benefit)$1,773 $212 $(2,940)$(1,628)
Components of net periodic benefit cost
Table10.2
Nine Months Ended September 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2025202420252024
Company service cost$— $— $703 $1,251 
Interest cost9,895 9,741 933 1,126 
Expected return on plan assets(10,327)(10,932)(8,733)(7,481)
Amortization of:
Net actuarial losses (gains)1,639 1,568 (2,077)(1,142)
Prior service cost (credit)259 259 353 1,360 
Cost of settlements and curtailments4,964 — — — 
Net periodic benefit cost (benefit)$6,430 $636 $(8,821)$(4,886)

In the first quarter of 2025, we made a contribution to our pension plan of $7.5 million.