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CURRENT AND DEFERRED INCOME TAX - Narrative (Details) CAD in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Feb. 26, 2015 USD ($) | Feb. 26, 2015 CAD | Jan. 27, 2015 CAD
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
Change in deferred tax liability, from tax reform | $ 6,449 |  |  |  |
Tax expense (benefit) from tax reform | $ 44,886 |  |  |  |
Statutory tax rate | 26.00% | 26.00% |  |  |
Deferred income tax liabilities | $ 114,576 | $ 116,887 |  |  |
Temporary differences associated with investments in subsidiaries | 75,814 | 88,661 |  |  |
Income tax notice of reassessment, possible loss | CAD |  |  |  |  | CAD 41,400
Income tax notice of reassessment, interest accrued | CAD |  |  |  |  | CAD 6,580
Income tax notice of reassessment, percentage of payment required in order to appeal |  |  |  |  | 50.00%
Income tax notice of reassessment, payment/tax receivable |  |  | $ 19,231 | CAD 24,090 |
Investments in Subsidiaries |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
Deferred income tax liabilities | $ 22,744 | $ 26,598 |  |  |

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- Definition The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Associates [member]; Subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_f&doctype=Standard -URIDate 2017-03-09 + Details
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