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Finance cost (Schedule of finance costs) (Details) - CAD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Borrowing costs [abstract]
Interest on long-term debt	$ 40,059,000	$ 39,266,000
Unwinding of discount on provisions	28,979,000	21,445,000
Other charges	16,690,000	15,901,000
Finance costs	85,728,000	$ 76,612,000
Borrowing costs capitalised	$ 0

X

- Definition

The amount of fees on the revolving credit facility and lines of credit.

+ References

No definition available.

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X

- References

No definition available.

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X

- Definition

The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 23
-IssueDate 2021-01-01
-Paragraph 26
-Subparagraph a
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-URIDate 2021-03-24

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- Definition

The amount of expense recognised due to the unwinding of the discount on provisions other than provisions from employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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X

- Definition

The amount of costs associated with financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 82
-Subparagraph b
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X

- Definition

The amount of interest expense on borrowings. [Refer: Interest expense; Borrowings]

+ References

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-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
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