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Summary of Right-of-Use-Assets (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Beginning Balance	$ 66,142	$ 0
Transition adjustments		73,464
Additions	3,167	1,947
Derecognition	(2,597)	(29)
Depreciation	(7,417)	(8,458)
Lease remeasurements	(3,631)	163
Effect of foreign currency exchange differences	(496)	(945)
Ending Balance	55,168	66,142
Real Estate [member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Beginning Balance	54,026	0
Transition adjustments		58,635
Additions	136	0
Derecognition	0	(29)
Depreciation	(3,900)	(4,055)
Lease remeasurements	(6,233)	163
Effect of foreign currency exchange differences	(340)	(688)
Ending Balance	43,689	54,026
Vehicles and Equipment [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Beginning Balance	12,116	0
Transition adjustments		14,829
Additions	3,031	1,947
Derecognition	(2,597)	0
Depreciation	(3,517)	(4,403)
Lease remeasurements	2,602	0
Effect of foreign currency exchange differences	(156)	(257)
Ending Balance	$ 11,479	$ 12,116

X

- Definition

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph h
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-URIDate 2020-01-01

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X

- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph a
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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

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X

- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph j
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X

- Definition

The increase (decrease) in the revaluation surplus that relates to right-of-use assets. [Refer: Revaluation surplus; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2020-01-01
-Paragraph 57
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- Definition

Derecognition right of use assets.

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Effect of foreign currency exchange differences, right-of-use assets.

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- Definition

Transition adjustments, right-of-use assets.

+ References

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