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Benefit Plans
 6 Months Ended
Jun. 30, 2024
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.
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, 2024 and 2023.
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)2024202320242023
Company service cost$— $— $417 $362 
Interest cost3,247 3,299 375 418 
Expected return on plan assets(3,644)(3,425)(2,494)(2,054)
Amortization of:
Net actuarial losses (gains)523 530 (380)(11)
Prior service cost (credit)86 86 453 466 
Cost of settlements and curtailments— 1,000 — — 
Net periodic benefit cost (benefit)$212 $1,490 $(1,629)$(819)
Components of net periodic benefit cost
Table10.2
Six Months Ended June 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2024202320242023
Company service cost$— $— $834 $748 
Interest cost6,494 6,981 750 816 
Expected return on plan assets(7,288)(7,006)(4,988)(4,117)
Amortization of:
Net actuarial losses (gains)1,046 1,127 (760)(75)
Prior service cost (credit)172 172 906 931 
Cost of settlements and curtailments— 8,847 — — 
Net periodic benefit cost (benefit)$424 $10,121 $(3,258)$(1,697)

In the first quarter of 2024, we made a contribution to our qualified pension plan of $23.0 million.