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Change in Provisions and Other (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Other Provisions [Abstract]
Beginning balance	$ 13,232	$ 15,461
Expensed during the year	3,359	2,613
Payment of deductibles and uninsured claims	(4,271)	(3,929)
Effects of foreign currency exchange differences	1,053	(913)
Ending balance	$ 13,373	$ 13,232

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- Definition

The increase in existing other provisions. [Refer: Other provisions]

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- Definition

The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]

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- Definition

The amount of provisions other than provisions for employee benefits. [Refer: Provisions]

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The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions]

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