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Share-Based Compensation Plan - Additional Information (Details) shares in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 CAD ($) share shares | Dec. 31, 2020 CAD ($) shares share | Dec. 31, 2019 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense related to share awards | $ 11,130,000 | $ 9,469,000 |
Cash compensation expense related to share awards | $ 4,700,000 | $ 2,300,000 |
Number of other equity instruments outstanding in share-based payment arrangement | shares | 9,474 | 8,210 | 6,936
Granted (in shares) | shares | 4,067 | 5,492 |
Current derivative financial liabilities | $ 134,020,000 | $ 26,792,000 |
Minimum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Payout multiplier | 0.00% |  |
Maximum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Payout multiplier | 200.00% |  |
Incentive Award Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Weighted average fair value of share awards (in cad per share) | $ 1.33 | $ 1.50 |
Number of other equity instruments outstanding in share-based payment arrangement | share | 6,400,000 | 2,600,000 |
Granted (in shares) | share | 5,000,000 | 2,900,000 |
Deferred Share Unit Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Weighted average fair value of share awards (in cad per share) | $ 1.29 |  |
Number of other equity instruments outstanding in share-based payment arrangement | share | 800,000 |  |
Granted (in shares) | share | 900,000 |  |
Incentive Award Plan And DSU Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Current derivative financial assets | $ 6,500,000 |  |
Current derivative financial liabilities |  | $ 1,100,000 |
Current derivative financial assets, realized portion of swap | $ 10,700,000 |  |
Current derivative financial liabilities, realized portion of swap |  | 1,200,000 |
Restricted awards |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of common shares entitled by restricted award | share | 1 |  |
Weighted average fair value of share awards (in cad per share) | $ 1.31 | $ 1.48 |
Number of other equity instruments outstanding in share-based payment arrangement | shares | 2,093 | 4,122 | 3,801
Granted (in shares) | shares | 0 | 2,239 |
Performance awards |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of other equity instruments outstanding in share-based payment arrangement | shares | 7,381 | 4,088 | 3,135
Granted (in shares) | shares | 4,067 | 3,253 |
Performance awards | Minimum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of common shares entitled by restricted award | share | 0 |  |
Performance awards | Maximum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of common shares entitled by restricted award | share | 2 |  |

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