Financial Instruments - Schedule of Line of Credit Facilities (Details) $ in Thousands, $ in Thousands	Sep. 27, 2020 CAD ($)	Sep. 27, 2020 USD ($)	Dec. 29, 2019 USD ($)
Line of Credit Facility [Line Items]
Production financing loan and other loans		$ 130,442	$ 218,753
CANADA
Line of Credit Facility [Line Items]
Production financing loan and other loans	$ 57,317
U.S.
Line of Credit Facility [Line Items]
Production financing loan and other loans		73,125
U.S. Dollars and Canadian Dollars
Line of Credit Facility [Line Items]
Production financing loan and other loans		$ 130,442