Employee Benefit Plans (Tables)

9 Months Ended

Sep. 25, 2022

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Costs

Components of net periodic benefit (income) cost for the Company's defined benefit plans were as follows (in thousands):

	Three months ended				Nine months ended
	September 25, 2022		September 26, 2021		September 25, 2022		September 26, 2021
Pension and SERPA Benefits:
Service cost	$	4,763	$	6,348	$	14,289	$	19,044
Interest cost	15,473		15,472		46,418		46,412
Expected return on plan assets	(31,476)		(32,720)		(94,428)		(98,160)
Amortization of unrecognized:
Prior service credit	(328)		(312)		(984)		(936)
Net loss	7,978		18,386		23,934		55,158
Settlement (gain) loss	—		—		(256)		816
Net periodic benefit (income) cost	$	(3,590)	$	7,174	$	(11,027)	$	22,334
Postretirement Healthcare Benefits:
Service cost	$	1,161	$	1,288	$	3,482	$	3,864
Interest cost	1,904		1,626		5,712		4,878
Expected return on plan assets	(3,809)		(3,495)		(11,427)		(10,485)
Amortization of unrecognized:
Prior service credit	(581)		(581)		(1,743)		(1,743)
Net loss	122		264		366		792
Net periodic benefit income	$	(1,203)	$	(898)	$	(3,610)	$	(2,694)