Income Taxes (Loss Carryforwards) (Details) $ in Thousands	Dec. 29, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 89,641
CANADA
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	60,605
Operating loss carryforwards, valuation allowance	1,300
Other Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	29,036
2020-2027
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	5,876
2020-2027 | CANADA
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
2020-2027 | Other Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	5,876
2028-2040
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	60,605
2028-2040 | CANADA
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	60,605
2028-2040 | Other Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Indefinitely
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	23,160
Indefinitely | CANADA
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Indefinitely | Other Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 23,160