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Capital Management - Additional Information (Details) - CAD ($)	Mar. 31, 2018	Mar. 31, 2017
Disclosure Of Financial Risk Management [Abstract]
Dividends payable to shareholders	$ 0
Total managed capital	$ 1,251,660,000	$ 650,056,000

X

- Definition

Disclosure of financial risk management.

+ References

No definition available.

+ Details

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X

- Definition

Net consolidated equity and debt.

+ References

No definition available.

+ Details

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X

- Definition

The amount of dividends payable by means of the distribution of non-cash assets to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRIC
-Number 17
-IssueDate 2017-01-01
-Paragraph 16
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRIC&num=17&date=2017-03-01&anchor=para_16_a&doctype=Standard
-URIDate 2017-03-09

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