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Property, plant and equipment (Tables) | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Schedule of property, plant and equipment | Depreciation is calculated based on the cost, net of the estimated residual value, over the estimated useful life of the assets on the following bases and rates:
Assets |  | Basis |  | Rate
Heavy equipment |  | Units of production |  | 3,000 - 120,000 hours
Major component parts in use |  | Units of production |  | 2,500 - 70,000 hours
Other equipment |  | Straight-line |  | 5 - 10 years
Licensed motor vehicles |  | Straight-line |  | 5 - 10 years
Office and computer equipment |  | Straight-line |  | 4 - 10 years
Furnishings, fixtures and facilities |  | Straight-line |  | 10 - 30 years
Buildings |  | Straight-line |  | 10 - 50 years
Leasehold improvements |  | Straight-line |  | Over shorter of estimated useful life and lease term
Land |  | No depreciation |  | No depreciation
December 31, 2022 |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Owned assets |  |  |  |  |  |
Heavy equipment |  | $ | 368,318 |  |  | $ | 123,695 |  |  | $ | 244,623 |
Major component parts in use |  | 388,169 |  |  | 163,124 |  |  | 225,045 |
Other equipment |  | 40,752 |  |  | 30,769 |  |  | 9,983 |
Licensed motor vehicles |  | 12,109 |  |  | 6,800 |  |  | 5,309 |
Office and computer equipment |  | 7,510 |  |  | 5,669 |  |  | 1,841 |
Buildings |  | 29,725 |  |  | 4,489 |  |  | 25,236 |
Capital inventory and capital work in progress |  | 46,050 |  |  | — |  |  | 46,050 |
Land |  | 10,472 |  |  | — |  |  | 10,472 |
|  | 903,105 |  |  | 334,546 |  |  | 568,559 |
Assets under finance lease |  |  |  |  |  |
Heavy equipment |  | 75,750 |  |  | 28,265 |  |  | 47,485 |
Major component parts in use |  | 40,406 |  |  | 22,264 |  |  | 18,142 |
Other equipment |  | 4,238 |  |  | 1,814 |  |  | 2,424 |
Licensed motor vehicles |  | 9,669 |  |  | 469 |  |  | 9,200 |
|  | 130,063 |  |  | 52,812 |  |  | 77,251 |
Total property, plant and equipment |  | $ | 1,033,168 |  |  | $ | 387,358 |  |  | $ | 645,810 |
December 31, 2021 |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Owned assets |  |  |  |  |  |
Heavy equipment |  | $ | 351,023 |  |  | $ | 105,686 |  |  | $ | 245,337 |
Major component parts in use |  | 332,042 |  |  | 131,157 |  |  | 200,885 |
Other equipment |  | 44,548 |  |  | 30,633 |  |  | 13,915 |
Licensed motor vehicles |  | 15,113 |  |  | 10,838 |  |  | 4,275 |
Office and computer equipment |  | 6,845 |  |  | 4,891 |  |  | 1,954 |
Buildings |  | 29,386 |  |  | 3,748 |  |  | 25,638 |
Capital inventory and capital work in progress |  | 38,350 |  |  | — |  |  | 38,350 |
Land |  | 10,472 |  |  | — |  |  | 10,472 |
|  | 827,779 |  |  | 286,953 |  |  | 540,826 |
Assets under finance lease |  |  |  |  |  |
Heavy equipment |  | 92,690 |  |  | 28,504 |  |  | 64,186 |
Major component parts in use |  | 52,679 |  |  | 21,996 |  |  | 30,683 |
Other equipment |  | 4,633 |  |  | 1,281 |  |  | 3,352 |
Licensed motor vehicles |  | 2,674 |  |  | 771 |  |  | 1,903 |
|  | 152,676 |  |  | 52,552 |  |  | 100,124 |
Total property, plant and equipment |  | $ | 980,455 |  |  | $ | 339,505 |  |  | $ | 640,950 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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