Long-term debt - Outstanding Amount (Details) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long-term debt
Revolving credit facility	$ 1,539,225	$ 1,392,206
Senior unsecured notes	385,440	404,001
Long-term debt	$ 1,924,665	$ 1,796,207

The amount of loans received from banks that have been secured by collateral. [Refer: Loans received]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2019-03-27

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