Income Taxes (Components of net deferred income tax liability) (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Income Tax Disclosure [Line Items]
Net deferred income tax liability	$ (25,408)	$ (9,040)
Canada [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	(26)	(223)
U.S. [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	(25,150)	(8,446)
Other [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	$ (232)	$ (371)

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e31931-109318

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e31917-109318

Name:	us-gaap_DeferredIncomeTaxLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant