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Schedule of Issued Capital (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Classes Of Share Capital [Abstract] |  |
Beginning balance, shares | 293,781,836 | 293,238,858
Share repurchase | (16,482,032) |
Issued on redemption of non-management directors' DSUs, shares |  | 476,978
Options exercised - cash consideration, shares |  | 66,000
Ending balance, shares | 277,299,804 | 293,781,836
Beginning balance | $ 2,322,280 | $ 2,319,293
Share repurchase | (25,902) |
Issued on redemption of non-management directors' DSUs |  | 2,609
Options exercised – cash consideration |  | 275
– reclassification from contributed surplus |  | 103
Ending balance | $ 2,296,378 | $ 2,322,280

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