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Share-Based Compensation - Summary of Share-based Compensation Expenses (Detail) - CAD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense | $ 4,049 | $ 5,267 | $ 12,937 | $ 1,816 | $ 7,749
Equity settled share-based payments [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense | 457 | 440 | 1,783 | 1,725 | 2,735
Deferred share units [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense |  |  | 3,053 | (1,830) | (720)
Phantom share entitlement plan [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense |  |  | 102 | (54) | (449)
Performance share units [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense |  |  | 3,470 | 667 | 2,754
Restricted share units [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense |  |  | 2,751 | 755 | 2,199
Cash performance target [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense |  |  | $ 1,778 | $ 553 | $ 1,230
Cash settled sharebased payments [Member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share-based compensation expense | $ 3,592 | $ 4,827 |  |  |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_a&doctype=Standard -URIDate 2021-03-24 + Details
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