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Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Parenthetical) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jan. 01, 2021
Jun. 26, 2020
Dec. 27, 2019
Jan. 01, 2021
Dec. 27, 2019
Dec. 28, 2018
Income Statement [Abstract]            
Charge for restructuring $ 1,600 $ 5,000 $ 3,300 $ 6,603 $ 3,334  
Charge for asset impairments $ 3,900   $ 1,200 $ 3,885 $ 1,180 $ 6,269