Employee Benefit Plans (Details) $ in Thousands	3 Months Ended
	Mar. 28, 2020 USD ($) plan	Mar. 30, 2019 USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amount Company expects to contribute to its pension plans	$ 4,700
Payment for pension benefits	$ 800	$ 900
Multiemployer Plans [Abstract]
Number Of Multiemployer Plans, Withdrawal Obligation Could Be Material | plan	2
Number Of Multiemployer Plans Withdrawal Obligation Could Be Material Certified Red Zone | plan	1
Number of Multiemployer Plans, Certified Red Zone | plan	5
Number of Multiemployer Plans, Certified Yellow Zone | plan	2
Number Of Multiemployer Plans, Withdrawal Obligation | plan	5
Accrued liability representing the present value of scheduled withdrawal liability payments for under-funded multi-employer plan	$ 5,500
Maximum [Member]
Multiemployer Plans [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	$ 755	678
Interest cost	1,428	1,710
Expected return on plan assets	(2,039)	(1,819)
Amortization of prior service cost	8	9
Amortization of net loss	854	1,146
Net pension cost	$ 1,006	$ 1,724