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Employee Benefits - Schedule of Net Periodic Pension Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Net periodic pension cost      
Service cost $ 534 $ 633 $ 996
Interest cost on projected benefit obligation 3,853 4,663 4,901
Expected return on plan assets (5,309) (6,538) (6,224)
Amortization of unrecognized loss 1,084 1,056 1,126
Net periodic pension cost (credit) $ 162 $ (186) $ 799