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Employee Benefit Plans (Details)
$ in Thousands
 3 Months Ended
Apr. 01, 2017
USD ($)
plan
Apr. 02, 2016
USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]    
Amount Company expects to contribute to its pension plans $ 4,400  
Pension Contributions $ 700 $ 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 6  
Number of Multiemployer Plans, Certified Yellow Zone | plan 1  
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 $ 1,800  
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 [Abstract]    
Service cost $ 735 637
Interest cost 1,669 1,745
Expected return on plan assets (1,788) (1,885)
Amortization of prior service cost/(benefit) 9 7
Amortization of net loss 1,203 1,168
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments 0 (1,223)
Net pension cost $ 1,828 $ 449