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Significant Accounting Policies - Foreign Transaction Gains and Losses (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Foreign currency transaction gains (losses) $ (6,481) $ 3,932 $ (5,820)