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Bank Indebtedness and Long-Term Debt (Components of interest expense, net) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Debt Disclosure [Abstract]      
Interest expense $ 26,816 $ 30,950 $ 30,870
Amortization of debt issuance costs 4,078 2,721 2,536
Interest income (852) (906) (285)
Interest expense, net $ 30,042 $ 32,765 $ 33,121