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Employee Benefits - Schedule of Projected Benefit Obligation and Change in Plan Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Change in projected benefit obligation:      
Projected benefit obligation at beginning of period $ 118,812 $ 113,436  
Service cost 534 633 $ 996
Interest cost 3,853 4,663 4,901
Actuarial (gain) loss (9,732) 5,808  
Curtailment gain 0 (310)  
Benefits paid (5,558) (5,418)  
Projected benefit obligation at end of period 107,909 118,812 113,436
Change in plan assets:      
Fair value of assets at beginning of period 88,452 79,087  
Actual (loss) return on plan assets (6,321) 11,109  
Employer contributions 4,668 3,674  
Benefits paid (5,558) (5,418)  
Fair value of assets at end of period 81,241 88,452 $ 79,087
Net unfunded status of plan $ (26,668) $ (30,360)