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Employee Benefit Plans (Details)
$ in Thousands
 3 Months Ended
Mar. 30, 2019
USD ($)
plan
Mar. 31, 2018
USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Amount Company expects to contribute to its pension plans $ 4,200  
Payment for pension benefits $ 900 $ 800
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 2  
Accrued liability representing the present value of scheduled withdrawal liability payments for under-funded multi-employer plan $ 1,600  
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 $ 678 799
Interest cost 1,710 1,625
Expected return on plan assets (1,819) (2,064)
Amortization of prior service cost 9 9
Amortization of net loss 1,146 888
Net pension cost $ 1,724 $ 1,257