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Basis of Presentation net earnings or earnings per share (Details) - CAD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statements [Line Items] |  |  |  |  |
Revenue | $ 323,069 | $ 203,205 | $ 960,156 | $ 1,217,052 | $ 2,045,422
COGS | 269,426 | 157,729 | 757,934 | 937,730 | 1,631,199
Gross margin | 53,643 | 45,476 | 202,222 | 279,322 | 414,223
SG&A | 46,804 | 38,455 | 147,931 | 163,310 | 182,315
Net earnings | (369) | 3,003 | (18,455) | 88,257 | 152,128
As previously reported |  |  |  |  |
Statements [Line Items] |  |  |  |  |
Revenue |  | 203,205 | 960,156 | 1,217,052 | 2,045,422
COGS |  | 153,657 | 740,602 | 918,873 | 1,616,337
Gross margin |  | 49,548 | 219,554 | 298,179 | 429,085
SG&A |  | 42,527 | 165,263 | 182,167 | 197,177
Net earnings | $ (369) | $ 3,003 | (18,455) | 88,257 | 152,128
Reclassification |  |  |  |  |
Statements [Line Items] |  |  |  |  |
COGS |  |  | 17,332 | 18,857 | 14,862
Gross margin |  |  | (17,332) | (18,857) | (14,862)
SG&A |  |  | (17,332) | (18,857) | (14,862)
Revised |  |  |  |  |
Statements [Line Items] |  |  |  |  |
Revenue |  |  | 960,156 | 1,217,052 | 2,045,422
COGS |  |  | 757,934 | 937,730 | 1,631,199
Gross margin |  |  | 202,222 | 279,322 | 414,223
SG&A |  |  | 147,931 | 163,310 | 182,315
Net earnings |  |  | $ (18,455) | $ 88,257 | $ 152,128

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