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Property, plant and equipment
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, plant and equipment Property, plant and equipment
December 31, 2024CostAccumulated
Depreciation		Net Book Value
Owned assets
Heavy equipment$598,377 $151,136 $447,241 
Major component parts in use775,672 247,882 527,790 
Other equipment55,443 35,901 19,542 
Licensed motor vehicles19,684 7,895 11,789 
Office and computer equipment10,224 6,988 3,236 
Buildings45,469 5,946 39,523 
Capital inventory and capital work in progress 118,829 — 118,829 
Land10,472 — 10,472 
1,634,170 455,748 1,178,422 
Assets under finance lease
Heavy equipment55,663 19,958 35,705 
Major component parts in use26,848 4,976 21,872 
Other equipment3,941 713 3,228 
Licensed motor vehicles7,943 586 7,357 
94,395 26,233 68,162 
Total property, plant and equipment$1,728,565 $481,981 $1,246,584 
December 31, 2023CostAccumulated
Depreciation		Net Book Value
Owned assets
Heavy equipment$503,359 $133,448 $369,911 
Major component parts in use747,036 207,969 539,067 
Other equipment49,207 33,952 15,255 
Licensed motor vehicles20,051 7,207 12,844 
Office and computer equipment10,133 6,336 3,797 
Buildings45,681 5,231 40,450 
Capital inventory and capital work in progress84,555 — 84,555 
Land10,472 — 10,472 
1,470,494 394,143 1,076,351 
Assets under finance lease
Heavy equipment64,691 19,435 45,256 
Major component parts in use28,514 9,580 18,934 
Other equipment37 12 25 
Licensed motor vehicles2,555 175 2,380 
95,797 29,202 66,595 
Total property, plant and equipment$1,566,291 $423,345 $1,142,946