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Property. plant and equipment (Details) - CAD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | $ 903,105 | $ 827,779
Owned assets, accumulated depreciation | 334,546 | 286,953
Owned assets, net book value | 568,559 | 540,826
Assets under finance lease, cost | 130,063 | 152,676
Assets under finance least, accumulated depreciation | 52,812 | 52,552
Assets under finance lease, net book value | 77,251 | 100,124
Total plant and equipment, cost | 1,033,168 | 980,455
Property, plant and equipment, accumulated depreciation | 387,358 | 339,505
Property, plant and equipment, net of accumulated depreciation | 645,810 | 640,950
Heavy equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 368,318 | 351,023
Owned assets, accumulated depreciation | 123,695 | 105,686
Owned assets, net book value | 244,623 | 245,337
Assets under finance lease, cost | 75,750 | 92,690
Assets under finance least, accumulated depreciation | 28,265 | 28,504
Assets under finance lease, net book value | 47,485 | 64,186
Major component parts in use |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 388,169 | 332,042
Owned assets, accumulated depreciation | 163,124 | 131,157
Owned assets, net book value | 225,045 | 200,885
Assets under finance lease, cost | 40,406 | 52,679
Assets under finance least, accumulated depreciation | 22,264 | 21,996
Assets under finance lease, net book value | 18,142 | 30,683
Other equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 40,752 | 44,548
Owned assets, accumulated depreciation | 30,769 | 30,633
Owned assets, net book value | 9,983 | 13,915
Assets under finance lease, cost | 4,238 | 4,633
Assets under finance least, accumulated depreciation | 1,814 | 1,281
Assets under finance lease, net book value | 2,424 | 3,352
Licensed motor vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 12,109 | 15,113
Owned assets, accumulated depreciation | 6,800 | 10,838
Owned assets, net book value | 5,309 | 4,275
Assets under finance lease, cost | 9,669 | 2,674
Assets under finance least, accumulated depreciation | 469 | 771
Assets under finance lease, net book value | 9,200 | 1,903
Office and computer equipment |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 7,510 | 6,845
Owned assets, accumulated depreciation | 5,669 | 4,891
Owned assets, net book value | 1,841 | 1,954
Buildings |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 29,725 | 29,386
Owned assets, accumulated depreciation | 4,489 | 3,748
Owned assets, net book value | 25,236 | 25,638
Capital inventory and capital work in progress |  |
Property, Plant and Equipment [Line Items] |  |
Owned assets, cost | 46,050 | 38,350
Owned assets, accumulated depreciation | 0 | 0
Owned assets, net book value | 46,050 | 38,350
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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