Financial Instruments - Schedule of Line of Credit Facilities (Details) $ in Thousands, $ in Thousands	Jun. 28, 2020 CAD ($)	Jun. 28, 2020 USD ($)	Dec. 29, 2019 USD ($)
Line of Credit Facility [Line Items]
Production Financing Loan and Other Loans		$ 148,384	$ 218,753
CANADA
Line of Credit Facility [Line Items]
Production Financing Loan and Other Loans	$ 60,829
U.S.
Line of Credit Facility [Line Items]
Production Financing Loan and Other Loans		$ 87,555