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Significant accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Schedule of depreciation 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 |  | 5,000 - 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, 2023 |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Owned assets |  |  |  |  |  |
Heavy equipment |  | $ | 503,359 |  |  | $ | 133,448 |  |  | $ | 369,911 |
Major component parts in use |  | 747,036 |  |  | 207,969 |  |  | 539,067 |
Other equipment |  | 49,207 |  |  | 33,952 |  |  | 15,255 |
Licensed motor vehicles |  | 20,051 |  |  | 7,207 |  |  | 12,844 |
Office and computer equipment |  | 10,133 |  |  | 6,336 |  |  | 3,797 |
Buildings |  | 45,681 |  |  | 5,231 |  |  | 40,450 |
Capital inventory and capital work in progress |  | 84,555 |  |  | — |  |  | 84,555 |
Land |  | 10,472 |  |  | — |  |  | 10,472 |
|  | 1,470,494 |  |  | 394,143 |  |  | 1,076,351 |
Assets under finance lease |  |  |  |  |  |
Heavy equipment |  | 64,691 |  |  | 19,435 |  |  | 45,256 |
Major component parts in use |  | 28,514 |  |  | 9,580 |  |  | 18,934 |
Other equipment |  | 37 |  |  | 12 |  |  | 25 |
Licensed motor vehicles |  | 2,555 |  |  | 175 |  |  | 2,380 |
|  | 95,797 |  |  | 29,202 |  |  | 66,595 |
Total property, plant and equipment |  | $ | 1,566,291 |  |  | $ | 423,345 |  |  | $ | 1,142,946 |
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 |
Schedule of useful lives of definite lived intangible assets | Estimated useful lives of definite lived intangible assets and corresponding amortization method are:
Assets |  | Basis |  | Rate
Internal-use software |  | Straight-line |  | 4 years
Customer relationship |  | Straight-line |  | 4 years

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