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Benefit Plans
 9 Months Ended
Sep. 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 nine months ended September 30, 2024 and 2023.
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)2024202320242023
Company service cost$— $— $417 $374 
Interest cost3,247 3,297 376 409 
Expected return on plan assets(3,644)(3,426)(2,493)(2,059)
Amortization of:
Net actuarial losses (gains)522 529 (382)(38)
Prior service cost (credit)87 87 454 465 
Cost of settlements and curtailments— 334 — — 
Net periodic benefit cost (benefit)$212 $821 $(1,628)$(849)
Components of net periodic benefit cost
Table10.2
Nine Months Ended September 30,
Pension and Supplemental Executive Retirement PlansOther Postretirement Benefit Plans
(In thousands)2024202320242023
Company service cost$— $— $1,251 $1,122 
Interest cost9,741 10,278 1,126 1,225 
Expected return on plan assets(10,932)(10,432)(7,481)(6,176)
Amortization of:
Net actuarial losses (gains)1,568 1,656 (1,142)(113)
Prior service cost (credit)259 259 1,360 1,396 
Cost of settlements and curtailments— 9,181 — — 
Net periodic benefit cost (benefit)$636 $10,942 $(4,886)$(2,546)

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