Pension and Postretirement Benefit Obligations - Summary of Components of Total Pension Expense (Details) - Pension Plans - Bargaining Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 973	$ 1,092	$ 2,919	$ 3,274
Interest cost	653	588	1,959	1,765
Expected return on plan assets	(819)	(762)	(2,458)	(2,287)
Recognized net actuarial gain	(9)	0	(27)	0
Amortization of prior service costs	4	4	12	12
Net periodic postretirement benefit cost	$ 802	$ 922	$ 2,405	$ 2,764