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Property, plant and equipment (Tables)
12 Months Ended
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [abstract]  
Summary of property, plant and equipment
Land and buildingsPlant and equipmentCapital works in progressMineral propertiesPre-development propertiesTotal
Cost
Balance at January 1, 2022$233,262 $2,568,179 $109,813 $3,580,743 $672,605 $7,164,602 
Additions/transfers7,420 21,901 181,216 84,065 (3,139)291,463 
(Write-down) recovery of assets(44)(37,264)(343)225 (906)(38,332)
Other movements/transfers4,691 77,274 (167,081)86,821 — 1,705 
Assets reclassified as held for sale
— — — — (425,587)(425,587)
Disposals(1,997)(6,357)— (12)(272)(8,638)
Balance at December 31, 2022$243,332 $2,623,733 $123,605 $3,751,842 $242,701 $6,985,213 
Balance at January 1, 2023$243,332 $2,623,733 $123,605 $3,751,842 $242,701 $6,985,213 
Additions/transfers2,034 43,352 158,430 225,664 25 429,505 
Write-down of assets— — — (3,183)— (3,183)
Other movements/transfers12,311 100,710 (168,761)51,269 — (4,471)
Assets reclassified as held for sale
— — — — 217 217 
Disposals(197)(3,382)(731)(126)(118)(4,554)
Capitalized interest— — — 17,087 — 17,087 
Balance at December 31, 2023$257,480 $2,764,413 $112,543 $4,042,553 $242,825 $7,419,814 
Accumulated depreciation
Balance at January 1, 2022$(77,084)$(1,273,204)$— $(1,801,647)$(9,456)$(3,161,391)
Depreciation for the year(14,303)(139,188)— (96,999)— (250,490)
Recovery of assets— 12,475 — — — 12,475 
Impairment— — — — (394,723)(394,723)
Other movements261 (1,752)— (820)(654)(2,965)
Assets reclassified as held for sale— — — — 400,856 400,856 
Disposals1,491 5,542 — — 254 7,287 
Balance at December 31, 2022$(89,635)$(1,396,127)$— $(1,899,466)$(3,723)$(3,388,951)
Balance at January 1, 2023$(89,635)$(1,396,127)$— $(1,899,466)$(3,723)$(3,388,951)
Depreciation for the year(21,540)(143,008)— (109,740)— (274,288)
Other movements(106)(2,387)— (676)(27)(3,196)
Assets reclassified as held for sale
— — — — (39)(39)
Disposals144 2,035 — 39 2,219 
Balance at December 31, 2023$(111,137)$(1,539,487)$— $(2,009,881)$(3,750)$(3,664,255)
Carrying amounts
At January 1, 2022$156,178 $1,294,975 $109,813 $1,779,096 $663,149 $4,003,211 
At December 31, 2022$153,697 $1,227,606 $123,605 $1,852,376 $238,978 $3,596,262 
Balance at December 31, 2023$146,343 $1,224,926 $112,543 $2,032,672 $239,075 $3,755,559