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Basis of Presentation net earnings or earnings per share (Details) - CAD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statements [Line Items]              
Revenue $ 372,077 $ 204,507 $ 695,146 $ 407,712 $ 960,156 $ 1,217,052 $ 2,045,422
COGS 308,488 153,405 577,914 311,134 757,934 937,730 1,631,199
Gross margin 63,589 51,102 117,232 96,578 202,222 279,322 414,223
SG&A 43,346 33,357 90,150 71,812 147,931 163,310 182,315
Net earnings $ 13,352 4,291 $ 12,983 7,294 (18,455) 88,257 152,128
As previously reported              
Statements [Line Items]              
Revenue   204,507   407,712 960,156 1,217,052 2,045,422
COGS   148,828   302,485 740,602 918,873 1,616,337
Gross margin   55,679   105,227 219,554 298,179 429,085
SG&A   37,934   80,461 165,263 182,167 197,177
Net earnings   $ 4,291   $ 7,294 (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