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INCOME TAXES (Changes to deferred income tax assets and liabilities) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Jan. 01, 2017
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Balance, beginning of fiscal year, net | $ 1,500 | $ 2,793
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | (4,895) | 3,156
Business acquisitions | 0 | (4,542)
Other | (318) | 93
Balance, end of fiscal year, net | (3,713) | 1,500
Non-capital losses |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | 31,202 | 9,847
Non-deductible reserves and accruals |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | (41,052) | 3,004
Property, plant and equipment |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | (3,062) | (11,438)
Intangible assets |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | 66,888 | 498
Other |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | 1,984 | 2,790
Change In Tax Rate Related Temporary Differences [Member] |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | 1,633 | 0
Unrecognized deferred tax assets |  |
Changes in deferred tax liability (asset) [abstract] |  |
Recognized in the statements of earnings | $ (62,488) | $ (1,545)

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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 2017-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_ii&doctype=Standard -URIDate 2017-03-09 + Details
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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 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
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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 -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
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