Other Postretirement Benefits - Schedule of Components of Net Periodic Postretirement Benefit Income (Details) - Other Postretirement Benefit Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 26, 2021
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 33	$ 46	$ 53
Interest cost	1,500	731	565
Amortization and other costs	1,945	3,293	3,407
Amortization of prior service credit	0	(368)	(3,098)
Net periodic pension (credit)/cost	$ 3,478	$ 3,702	$ 927