Components of Accounts Receivable (Detail) - CAD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable [Abstract]
Trade	$ 178,433	$ 150,142
Accrued trade	91,708	87,685
Prepaids and other	52,444	55,855
Trade and other current receivables	$ 322,585	$ 293,682

The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2016-01-13
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_78_b&doctype=Standard
-URIDate 2016-03-31

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