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Pension and Postretirement Benefit Obligations (Tables)
 6 Months Ended
Jun. 28, 2024
Retirement Benefits [Abstract]  
Summary of Components of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost
The components of total pension expense were as follows:

Second QuarterFirst Half
(in thousands)2024202320242023
Service cost$1,091 $1,100 $2,182 $2,199 
Interest cost588 3,508 1,177 7,016 
Expected return on plan assets(762)(2,914)(1,525)(5,828)
Recognized net actuarial loss— 973 — 1,946 
Amortization of prior service cost4 4 8 8 
Net periodic pension cost921 2,671 1,842 5,341 
Settlement expense— 39,777 — 39,777 
Total pension expense$921 $42,448 $1,842 $45,118 
The components of net periodic postretirement benefit cost were as follows:

Second QuarterFirst Half
(in thousands)2024202320242023
Service cost$310 $294 $620 $588 
Interest cost781 697 1,562 1,395 
Recognized net actuarial loss26 — 52 — 
Net periodic postretirement benefit cost$1,117 $991 $2,234 $1,983