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SHARE-BASED COMPENSATION - Narrative (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 shares | Dec. 31, 2020 shares | Dec. 31, 2019 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares issued | 7,261,210 |  |
Number of share options outstanding in share-based payment arrangement (in shares) | 5,119,591 | 4,700,000 | 7,500,000
Number of other equity instruments outstanding in share-based payment arrangement (in shares) | 6,895,016 | 6,700,000 | 5,300,000
Options |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 5 years |  |
Expiration period | 7 years |  |
Maximum allotment of common shares reserved in share-based payment arrangement (in shares) | 23,905,624 |  |
Common stock, capital shares issued | 16,071,053 |  |
Common shares in reserve in share-based payment arrangement (in shares) | 7,834,571 |  |
Common shares unallocated in reserve in share-based payment arrangement (in shares) | 2,714,980 |  |
Share units |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Maximum allotment of common shares reserved in share-based payment arrangement (in shares) | 21,756,762 |  |
Common shares in reserve in share-based payment arrangement (in shares) | 14,495,552 |  |
Common shares unallocated in reserve in share-based payment arrangement (in shares) | 7,600,536 |  |
Performance Share Units |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 36 months |  |
Employee Share Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Company's matching percentage | 75.00% |  |
Employee contribution percentage | 5.00% |  |
Maximum percentage company will match | 3.75% |  |
Bottom of range | Employee Share Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution, percentage of base salary | 1.00% |  |
Top of range | Employee Share Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution, percentage of base salary | 10.00% |  |
Treasury shares |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares issued | 0 |  |

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