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Bank Indebtedness and Long-Term Debt (Principal repayments of long-term debt) (Details) - USD ($)
$ in Thousands
Jan. 02, 2021
Dec. 28, 2019
Debt Disclosure [Abstract]    
2021 $ 4,219  
2022 7,797  
2023 3,697  
2024 3,578  
2025 51,549  
Thereafter 1,839  
Total gross repayments 72,679  
Less: imputed interest (2,956)  
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year $ 69,723 $ 238,332