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Employee Benefits - Schedule of Unfunded Status and Amounts Recognized on Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Retirement Benefits [Abstract]    
Unfunded status $ (26,668) $ (30,360)
Unrecognized prior service cost 0 0
Unrecognized actuarial loss 34,699 33,884
Amounts recognized on the balance sheet consist of:    
Accrued pension liability (26,668) (30,360)
Accumulated other comprehensive loss (pre-tax) 34,699 33,884
Net amounts recognized $ 8,031 $ 3,524