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Property, Plant and Equipment - Additional Information (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [Line Items]
Goodwill impairment charges	$ 207,544
Impairment of property, plant and equipment		$ 15,313
Mexico CGU [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Cash flow projection period	5 years
Recoverable amount of asset or cash-generating unit	17.10%
Impairment of property, plant and equipment	$ 15,300
Value in use	$ 26,300

X

- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

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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.

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The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

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- Definition

The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The higher of an asset’s (or cash-generating unit’s) fair value less costs of disposal and its value in use. [Refer: Cash-generating units [member]]

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