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Net Periodic Pension Cost (Benefit)
 9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Net Periodic Pension Cost (Benefit) Net Periodic Pension Cost (Benefit)
The following table shows the components of our net periodic pension cost (benefit):
Three Months EndedNine Months Ended
Pension-related itemsSeptember 30, 2023October 1, 2022September 30, 2023October 1, 2022
(In thousands)(In thousands)
Service cost (1)
$— $— $— $— 
Interest cost on projected benefit obligation1,105 606 3,314 1,818 
Expected return on plan assets(812)(1,177)(2,437)(3,531)
Amortization of unrecognized gain301 209 905 627 
Net periodic pension cost (benefit)$594 $(362)$1,782 $(1,086)
(1) Service cost is not a part of our net periodic pension benefit as our pension plan is frozen for all participants.
The net periodic pension cost (benefit) is included in other expense, net in our condensed consolidated statement of operations and comprehensive income.

During the three and nine months ended September 30, 2023, we continued our previously announced plan to terminate the BlueLinx Corporation Hourly Retirement Plan (the “plan”) and transfer the management and delivery of continuing benefits associated with the plan to a highly rated and qualified insurance company with pension termination experience. The process for terminating a pension plan involves several regulatory steps and approvals, and typically takes 12 to 18 months to complete. We estimate the plan termination will be completed during fiscal 2023 or early fiscal 2024.