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INCOME TAXES (Changes to deferred income tax assets and liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019
Reconciliation of changes in deferred tax liability (asset) [abstract]
Balance, beginning of fiscal year, net	$ 9,917	$ (12,623)
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	7,724	23,623
Business acquisitions	0	(1,100)
Other	48	17
Balance, end of fiscal year, net	17,689	9,917
Non-capital losses
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	155	14,804
Non-deductible reserves and accruals
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	16,044	1,107
Property, plant and equipment
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	4,400	2,142
Intangible assets
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	5,344	1,033
Other
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	(825)	2,203
Unrecognized deferred income tax assets
Changes in deferred tax liability (asset) [abstract]
Recognized in the statements of earnings	$ (17,394)	$ 2,334

X

- Definition

Increase (Decrease) Through Other, Deferred Tax Liability (Asset)

+ References

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- Definition

The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2019-01-01
-Paragraph 81
-Subparagraph g
-Clause ii
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-URIDate 2019-03-27

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- Definition

The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2019-01-01
-Paragraph 81
-Subparagraph g
-Clause i
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- Definition

The increase (decrease) in deferred tax liability (asset) resulting from business combinations. [Refer: Deferred tax liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URIDate 2019-03-27

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