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Schedule of Provision for Income Taxes (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Reconciliation Of Changes In Deferred Tax Liability Asset [Abstract] |  |
Loss before income taxes | $ (323,596) | $ (232,057)
Federal and provincial statutory rates | 27.00% | 27.00%
Tax at statutory rates | $ (87,371) | $ (62,655)
Adjusted for the effect of: |  |
Non-deductible expenses | 49,455 | 2,672
Non-taxable capital gains | (845) | (175)
Income taxed at lower rates |  | (42,334)
Impact of foreign tax rates | 4,861 | (2,814)
Withholding taxes | 1,061 | 1,165
Taxes related to prior years | 3,803 | (618)
Other | (290) | 4,738
Income tax recovery | $ (29,326) | $ (100,021)

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