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Property. plant and equipment (Details) - CAD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | $ 1,634,170 | $ 1,470,494
Owned assets, accumulated depreciation | 455,748 | 394,143
Owned assets, net book value | 1,178,422 | 1,076,351
Assets under finance lease, cost | 94,395 | 95,797
Assets under finance lease, accumulated depreciation | 26,233 | 29,202
Assets under finance lease, net book value | 68,162 | 66,595
Total property, plant and equipment, cost | 1,728,565 | 1,566,291
Total property, plant and equipment, accumulated depreciation | 481,981 | 423,345
Total property, plant and equipment, net book value | 1,246,584 | 1,142,946
Heavy equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 598,377 | 503,359
Owned assets, accumulated depreciation | 151,136 | 133,448
Owned assets, net book value | 447,241 | 369,911
Assets under finance lease, cost | 55,663 | 64,691
Assets under finance lease, accumulated depreciation | 19,958 | 19,435
Assets under finance lease, net book value | 35,705 | 45,256
Major component parts in use |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 775,672 | 747,036
Owned assets, accumulated depreciation | 247,882 | 207,969
Owned assets, net book value | 527,790 | 539,067
Assets under finance lease, cost | 26,848 | 28,514
Assets under finance lease, accumulated depreciation | 4,976 | 9,580
Assets under finance lease, net book value | 21,872 | 18,934
Other equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 55,443 | 49,207
Owned assets, accumulated depreciation | 35,901 | 33,952
Owned assets, net book value | 19,542 | 15,255
Assets under finance lease, cost | 3,941 | 37
Assets under finance lease, accumulated depreciation | 713 | 12
Assets under finance lease, net book value | 3,228 | 25
Licensed motor vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 19,684 | 20,051
Owned assets, accumulated depreciation | 7,895 | 7,207
Owned assets, net book value | 11,789 | 12,844
Assets under finance lease, cost | 7,943 | 2,555
Assets under finance lease, accumulated depreciation | 586 | 175
Assets under finance lease, net book value | 7,357 | 2,380
Office and computer equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 10,224 | 10,133
Owned assets, accumulated depreciation | 6,988 | 6,336
Owned assets, net book value | 3,236 | 3,797
Buildings |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 45,469 | 45,681
Owned assets, accumulated depreciation | 5,946 | 5,231
Owned assets, net book value | 39,523 | 40,450
Capital inventory and capital work in progress |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 118,829 | 84,555
Owned assets, accumulated depreciation | 0 | 0
Owned assets, net book value | 118,829 | 84,555
Land |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 10,472 | 10,472
Owned assets, accumulated depreciation | 0 | 0
Owned assets, net book value | $ 10,472 | $ 10,472

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