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Accounts Receivable And Contract Assets - Summary of Accounts Receivables (Detail) - CAD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure Of Trade And Other Receivables [Line Items] |  |  |
Trade receivables | $ 222,686 | $ 213,815 | $ 194,777
Less: allowance for doubtful accounts | (10,103) | (10,334) | (11,439)
Trade receivables, net | 212,583 | 203,481 | 183,338
Other receivables | 9,463 | 8,725 | 30,037
Total accounts receivable | $ 222,046 | $ 212,206 | $ 213,375

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