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Financial Instruments - Summary of Detailed Information About Financial Instruments (Detail) - CAD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Carrying value, Cash and cash equivalents | $ 133,214 | $ 172,758 | $ 110,642 | $ 95,676 | $ 96,255 | $ 326,864
Carrying value, Derivative instruments in designated hedge accounting relationships |  | 294 |  | 491 |  |
Carrying value, Accounts receivable | 222,046 | 212,206 |  | 213,375 |  |
Carrying value, Contract assets | 114,178 | 82,760 |  | 66,722 | $ 130,392 |
Carrying value, Long-term receivables |  | 24,172 |  | 31,910 |  |
Carrying value, Derivative instruments in designated hedge accounting relationships |  | 180 |  | 371 |  |
Carrying value, Accounts payable and accrued liabilities | 256,296 | 240,747 |  | 182,152 |  |
Carrying value, Long-term debt – Bank Facility |  | 30,522 |  | 40,000 |  |
Carrying value, Long-term debt – Asset-Based Facility |  | 37,411 |  | 84,369 |  |
Carrying value, Long-term debt – Notes |  | 266,865 |  | 267,810 |  |
Carrying value, Other long-term liabilities | 18,002 | 15,785 |  | 10,967 |  |
Estimated fair value, Financial Assets | 300 | 300 |  |  |  |
Estimated fair value, Financial Liabilities | $ 400 | 180 |  | 371 |  |
Accounts payable and accrued liabilities [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  | 240,747 |  | 182,152 |  |
Long-term debt – Bank Facility [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  | 30,522 |  | 84,369 |  |
Long-term debt – Asset-Based Facility [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  | 37,411 |  |  |  |
Long-term debt – Notes [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  | 280,295 |  | 284,605 |  |
Other long-term liabilities [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  | 15,785 |  | 10,967 |  |
Current portion of long-term debt - Notes [Member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Liabilities |  |  |  | 40,610 |  |
Cash and cash equivalents [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Assets |  | 172,758 |  | 95,676 |  |
Derivative instruments in designated hedge accounting relationships [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Assets |  | 294 |  | 491 |  |
Accounts receivable [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Assets |  | 212,206 |  | 213,375 |  |
Contract assets [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Assets |  | 82,760 |  | 66,722 |  |
Long-term receivables [member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Estimated fair value, Financial Assets |  | $ 27,471 |  | $ 35,696 |  |

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