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Pension and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 25, 2022
Pension Plan  
Pension Benefits  
Schedule of Components of Net Periodic Pension Cost and Postretirement Benefit Income
The components of net periodic pension cost were as follows:
For the Quarters Ended
 September 25, 2022September 26, 2021
(In thousands)Qualified
Plans		Non-
Qualified
Plans		All
Plans		Qualified
Plans		Non-
Qualified
Plans		All
Plans
Service cost$2,882 $— $2,882 $2,276 $— $2,276 
Interest cost 8,837 1,284 10,121 7,630 1,087 8,717 
Expected return on plan assets (13,807)— (13,807)(12,678)— (12,678)
Amortization of actuarial loss 3,266 1,643 4,909 5,056 1,821 6,877 
Amortization of prior service credit (486)— (486)(486)— (486)
Net periodic pension cost$692 $2,927 $3,619 $1,798 $2,908 $4,706 
For the Nine Months Ended
 September 25, 2022September 26, 2021
(In thousands)Qualified
Plans		Non-
Qualified
Plans		All
Plans		Qualified
Plans		Non-
Qualified
Plans		All
Plans
Service cost$8,645 $— $8,645 $6,828 $— $6,828 
Interest cost 26,512 3,853 30,365 22,888 3,263 26,151 
Expected return on plan assets (41,422)— (41,422)(38,033)— (38,033)
Amortization of actuarial loss 9,799 4,929 14,728 15,169 5,463 20,632 
Amortization of prior service credit (1,459)— (1,459)(1,458)— (1,458)
Net periodic pension cost$2,075 $8,782 $10,857 $5,394 $8,726 $14,120 
Other Postretirement Benefit Plan  
Pension Benefits  
Schedule of Components of Net Periodic Pension Cost and Postretirement Benefit Income
The components of net periodic postretirement benefit cost were as follows:
For the Quarters EndedFor the Nine Months Ended
(In thousands)September 25, 2022September 26, 2021September 25, 2022September 26, 2021
Service cost$11 $14 $34 $40 
Interest cost 183 141 548 423 
Amortization of actuarial loss 823 851 2,470 2,555 
Amortization of prior service credit — (837)(368)(2,509)
Net periodic postretirement benefit cost$1,017 $169 $2,684 $509