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Inventories (Tables)
6 Months Ended
Jun. 29, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
          December 29 ,  
    June 29, 2019     2018  
    $       $
Raw materials and work-in-process   296,487     278,038  
Finished goods   89,688     83,225  
Company-owned grain       10,155  
Inventory reserves   (8,798 )   (9,461 )
    377,377     361,957