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Employee Benefits - Schedule of Projected Benefit Obligation and Change in Plan Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Change in projected benefit obligation:      
Projected benefit obligation at beginning of period $ 113,436 $ 115,055  
Service cost 633 996 $ 1,104
Interest cost 4,663 4,901 5,099
Actuarial loss 5,808 2,094  
Curtailment gain (310) (181)  
Benefits paid (5,418) (9,429)  
Projected benefit obligation at end of period 118,812 113,436 115,055
Change in plan assets:      
Fair value of assets at beginning of period 79,087 78,264  
Actual return on plan assets 11,109 4,868  
Employer contributions 3,674 5,384  
Benefits paid (5,418) (9,429)  
Fair value of assets at end of period 88,452 79,087 $ 78,264
Net unfunded status of plan $ (30,360) $ (34,349)