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Employee Benefit Plans - Plans with Projected Benefit Obligations in Excess of Fair Value of Plan Assets (Details) - Pension benefits - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
U.S. Pension    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Projected benefit obligation $ 29,715 $ 34,757
Fair value of plan assets 28,729 31,754
Non-U.S. Pension    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Projected benefit obligation 3,671 4,270
Fair value of plan assets $ 726 $ 557