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Property, plant and equipment - Summary of property, plant and equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance $ 4,003,211 $ 4,042,199
(Impairment) reversal 0 13,926
(Write-down) recovery of assets (32,499) (9,106)
Ending balance 3,596,262 4,003,211
Land and buildings    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 156,178 152,251
Ending balance 153,697 156,178
Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,294,975 1,251,593
Ending balance 1,227,606 1,294,975
Capital works in progress    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 109,813 83,513
Ending balance 123,605 109,813
Mineral properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,779,096 1,694,381
Ending balance 1,852,376 1,779,096
Pre-development properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 663,149 860,461
Ending balance 238,978 663,149
Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 7,164,602 7,011,398
Additions/transfers 291,463 316,064
Acquisition of QMX Gold Corporation   82,858
(Impairment) reversal   (3,923)
(Write-down) recovery of assets (38,332) (7,130)
Other movements/transfers 1,705 (10,947)
Assets reclassified as held for sale (425,587) (210,570)
Disposals (8,638) (13,148)
Ending balance 6,985,213 7,164,602
Cost | Land and buildings    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 233,262 222,908
Additions/transfers 7,420 12,139
Acquisition of QMX Gold Corporation   2,357
(Impairment) reversal   0
(Write-down) recovery of assets (44) 0
Other movements/transfers 4,691 (2,539)
Assets reclassified as held for sale 0 0
Disposals (1,997) (1,603)
Ending balance 243,332 233,262
Cost | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 2,568,179 2,400,876
Additions/transfers 21,901 80,815
Acquisition of QMX Gold Corporation   1,649
(Impairment) reversal   0
(Write-down) recovery of assets (37,264) (3,520)
Other movements/transfers 77,274 96,373
Assets reclassified as held for sale 0 0
Disposals (6,357) (8,014)
Ending balance 2,623,733 2,568,179
Cost | Capital works in progress    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 109,813 83,513
Additions/transfers 181,216 134,237
Acquisition of QMX Gold Corporation   0
(Impairment) reversal   (3,923)
(Write-down) recovery of assets (343) 0
Other movements/transfers (167,081) (104,014)
Assets reclassified as held for sale 0 0
Disposals 0 0
Ending balance 123,605 109,813
Cost | Mineral properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 3,580,743 3,431,908
Additions/transfers 84,065 72,192
Acquisition of QMX Gold Corporation   78,852
(Impairment) reversal   0
(Write-down) recovery of assets 225 (696)
Other movements/transfers 86,821 (865)
Assets reclassified as held for sale 0 0
Disposals (12) (648)
Ending balance 3,751,842 3,580,743
Cost | Pre-development properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 672,605 872,193
Additions/transfers (3,139) 16,681
Acquisition of QMX Gold Corporation   0
(Impairment) reversal   0
(Write-down) recovery of assets (906) (2,914)
Other movements/transfers 0 98
Assets reclassified as held for sale (425,587) (210,570)
Disposals (272) (2,883)
Ending balance 242,701 672,605
Accumulated depreciation    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (3,161,391) (2,969,199)
Depreciation for the year (250,490) (201,826)
(Impairment) reversal (394,723) (10,003)
(Write-down) recovery of assets 12,475  
Other movements/transfers (2,965) 9,924
Assets reclassified as held for sale 400,856 2,964
Disposals 7,287 6,749
Ending balance (3,388,951) (3,161,391)
Accumulated depreciation | Land and buildings    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (77,084) (70,657)
Depreciation for the year (14,303) (8,285)
(Impairment) reversal 0 0
(Write-down) recovery of assets 0  
Other movements/transfers 261 771
Assets reclassified as held for sale 0 0
Disposals 1,491 1,087
Ending balance (89,635) (77,084)
Accumulated depreciation | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (1,273,204) (1,149,283)
Depreciation for the year (139,188) (127,287)
(Impairment) reversal 0 (10,939)
(Write-down) recovery of assets 12,475  
Other movements/transfers (1,752) 9,043
Assets reclassified as held for sale 0 0
Disposals 5,542 5,262
Ending balance (1,396,127) (1,273,204)
Accumulated depreciation | Capital works in progress    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 0 0
Depreciation for the year 0 0
(Impairment) reversal 0 0
(Write-down) recovery of assets 0  
Other movements/transfers 0 0
Assets reclassified as held for sale 0 0
Disposals 0 0
Ending balance 0 0
Accumulated depreciation | Mineral properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (1,801,647) (1,737,527)
Depreciation for the year (96,999) (66,254)
(Impairment) reversal 0 936
(Write-down) recovery of assets 0  
Other movements/transfers (820) 1,198
Assets reclassified as held for sale 0 0
Disposals 0 0
Ending balance (1,899,466) (1,801,647)
Accumulated depreciation | Pre-development properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (9,456) (11,732)
Depreciation for the year 0 0
(Impairment) reversal (394,723) 0
(Write-down) recovery of assets 0  
Other movements/transfers (654) (1,088)
Assets reclassified as held for sale 400,856 2,964
Disposals 254 400
Ending balance $ (3,723) $ (9,456)