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Condensed Consolidated Statement of Comprehensive Income (Loss) (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of subsidiaries [Line Items] |  |
Net earnings | $ 6,618 | $ (294,270)
Other comprehensive income (loss) | (27,759) | 30,404
Comprehensive loss | (21,141) | (263,866)
Guarantor Subsidiaries [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Net earnings | 100,366 | (161,200)
Other comprehensive income (loss) | (79,018) | 129,804
Comprehensive loss | 21,348 | (31,396)
Non-Guarantor Subsidiaries [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Net earnings | 1,748 | (7,775)
Other comprehensive income (loss) | (27,655) | 45,190
Comprehensive loss | (25,907) | 37,415
Consolidating Adjustments [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Net earnings | (102,339) | 168,759
Other comprehensive income (loss) | (108) | 636
Comprehensive loss | (102,447) | 169,395
Parent [member] |  |
Disclosure of subsidiaries [Line Items] |  |
Net earnings | 6,843 | (294,054)
Other comprehensive income (loss) | 79,022 | (145,226)
Comprehensive loss | $ 85,865 | $ (439,280)

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