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Long-term receivables, investments and other (Details) - CAD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Categories Of Noncurrent Financial Assets [Abstract]
Investments in equity securities	$ 21,417	$ 14,807
Derivatives	40,804	10,612
Advances receivable from JV Inkai LLP	58,820	90,095
Investment tax credits	92,846	93,920
Amounts receivable related to tax dispute	303,222	264,042
Other receivables	39,053	49,506
Total (current and non current portion)	556,162	522,982
Less current portion	(36,089)	(10,498)
Net	$ 520,073	$ 512,484

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- Definition

Receivables from the tax authroities related to income tax disputes.

+ References

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- Definition

Amount of equity securities categorized neither as held to maturity nor as trading.

+ References

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- Definition

The amount of current portion of long term receivables, investments and other items.

+ References

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- Definition

Investment tax credit receivable related to research and development.

+ References

No definition available.

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- Definition

The amount of noncurrent receivables, investments and other.

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- Definition

The amount of receivables, investments and other items.

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- Definition

The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

+ References

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- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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- Definition

The amount receivable by the entity that it does not separately disclose in the same statement or note.

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