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Supplementary Cash Flow Information - Summary of Cash and Cash Equivalents (Details) - CAD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Disclosure Of Cash Flow Statement [Abstract]
Cash	$ 322,560	$ 16,700
Short-term guaranteed investment certificates		85,100
Total cash and cash equivalents	$ 322,560	$ 101,800	$ 15,397

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- Definition

Disclosure of cash flow statement.

+ References

No definition available.

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- Definition

The amount of cash on hand and demand deposits. [Refer: Cash on hand]

+ References

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents]

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