Non-controlling Interests - Summary of Net Change in Non-controlling Interests (Parenthetical) (Details) $ in Thousands	Mar. 31, 2018 CAD ($)
Vert Mirabel
Disclosure Of Non Controlling Interests [Line Items]
Noncontrolling interest arising on acquisition	$ 2,839
Canopy Rivers Corporation
Disclosure Of Non Controlling Interests [Line Items]
Non-controlling interest arising on the change in ownership interest	$ 37

The amount of non-controlling interest in the acquiree recognised at the acquisition date for business combinations in which the acquirer holds less than 100 per cent of the equity interests in the acquiree at the acquisition date. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph o
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_o_i&doctype=Appendix&seq=2
-URIDate 2017-03-09

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant