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Summary of Significant Accounting Policies (Freight Expenses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Disaggregation of Revenue [Line Items]      
Cost of sales $ 1,234,243 $ 1,413,185 $ 1,422,857
Freight expense      
Disaggregation of Revenue [Line Items]      
Cost of sales $ 98,417 $ 123,667 $ 134,190