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Shareholders' Capital (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Classes Of Share Capital [Abstract] |
Schedule of Issued Capital |
Common shares |  | Number |  |  | Amount |
Balance, December 31, 2018 |  |  | 14,689,092 |  |  | $ | 2,322,280 |
Share repurchase |  |  | (824,102 | ) |  |  | (25,902 | )
Balance, December 31, 2019 |  |  | 13,864,990 |  |  | $ | 2,296,378 |
Share repurchase |  |  | (420,588 | ) |  |  | (11,317 | )
Share issuance on redemption of non-management DSUs |  |  | 15,228 |  |  |  | 677 |
Share consolidation adjustment |  |  | (37 | ) |  |  | — |
Balance, December 31, 2020 |  |  | 13,459,593 |  |  | $ | 2,285,738 |

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