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Consolidated Statements of Comprehensive Loss - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Statement Of Comprehensive Income [Abstract] |  |
Net earnings (loss) | $ (120,138) | $ 6,618
Unrealized loss on translation of assets and liabilities of operations denominated in foreign currency | (25,925) | (106,781)
Foreign exchange gain on net investment hedge with U.S. denominated debt | 23,853 | 79,022
Tax benefit related to net investment hedge of long-term debt | 5,398 |
Comprehensive loss | $ (116,812) | $ (21,141)

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