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Components of Accounts Payable and Accrued Liabilities (Detail) - CAD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable And Accrued Liabilities [Abstract]
Accounts payable	$ 129,493	$ 87,436
Accrued liabilities:
Payroll	73,682	58,550
Other	71,314	63,639
Accounts payable and accrued liabilities	$ 274,489	$ 209,625

X

- Definition

The amount of current payables that the entity does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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X

- Definition

The amount of payment due to suppliers for goods and services used in the entity's business.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 1
-IssueDate 2017-01-01
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X

- Definition

Accounts Payable And Accrued Liabilities [Abstract]

+ References

No definition available.

+ Details

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X

- Definition

Accrued liabilities.

+ References

No definition available.

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X

- Definition

Accrued liabilities payroll.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant