Employee Benefit Plans (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021 USD ($) plan	Jun. 27, 2020 USD ($)	Jul. 03, 2021 USD ($) plan	Jun. 27, 2020 USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amount Company expects to contribute to its pension plans	$ 3,800		$ 3,800
Payment for pension benefits			$ 1,800	$ 2,400
Defined Benefit Plan, Additional Information [Abstract]
Number Of Multiemployer Plans, Withdrawal Obligation Could Be Material | plan	2		2
Number Of Multiemployer Plans Withdrawal Obligation Could Be Material Certified Red Zone | plan	1		1
Number of Multiemployer Plans, Certified Red Zone | plan	5		5
Number of Multiemployer Plans, Certified Yellow Zone | plan	2		2
Number Of Multiemployer Plans, Withdrawal Obligation | plan	4		4
Additional Liability, Defined Benefit Pension Plan	$ 1,300		$ 1,300
Accrued liability representing the present value of scheduled withdrawal liability payments for under-funded multi-employer plan	3,900		$ 3,900
Maximum [Member]
Defined Benefit Plan, Additional Information [Abstract]
Multiemployer Plan, Contributions To Individual Plan, Percent			5.00%
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	796	$ 749	$ 1,581	1,504
Interest cost	1,209	1,430	2,413	2,858
Expected return on plan assets	(2,328)	(2,032)	(4,649)	(4,071)
Amortization of prior service cost	6	8	11	16
Amortization of actuarial loss	1,053	854	2,105	1,708
Net pension cost	$ 736	$ 1,009	$ 1,461	$ 2,015