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Change in Provisions and Other (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Provisions [Abstract]
Beginning balance	$ 15,461	$ 18,829
Expensed during the year	2,613	2,279
Payment of deductibles and uninsured claims	(3,929)	(5,050)
Effects of foreign currency exchange differences	(913)	(597)
Ending balance	$ 13,232	$ 15,461

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- References

No definition available.

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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]

+ References

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- Definition

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

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- Definition

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

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