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Pension and Other Postretirement Obligations
 9 Months Ended
Oct. 03, 2021
Retirement Benefits [Abstract]  
Pension and Other Postretirement Obligations Pension and Other Postretirement Obligations
The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: 
 Pension ObligationsOther Postretirement Obligations
Three Months EndedOctober 3, 2021September 27, 2020October 3, 2021September 27, 2020
 (In thousands)
Service cost$941 $885 $8 $8 
Interest cost1,914 2,493 182 202 
Expected return on plan assets(4,081)(4,091)— — 
Amortization of prior service cost 27 47 — — 
Actuarial losses (gains)971 688 (5)(19)
Net periodic benefit cost (income)$(228)$22 $185 $191 
 Pension ObligationsOther Postretirement Obligations
Nine Months EndedOctober 3, 2021September 27, 2020October 3, 2021September 27, 2020
 (In thousands)
Service cost$2,982 $2,709 $26 $24 
Interest cost5,617 7,240 545 599 
Expected return on plan assets(12,276)(12,035)— — 
Amortization of prior service cost 83 136 — — 
Actuarial losses (gains)2,926 2,038 (16)(57)
Net periodic benefit cost (income)$(668)$88 $555 $566