v3.26.1
Intangible assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year $ 834,687 $ 909,279
Cost, beginning 2,176,592 2,543,799
Accumulated amortization and impairment, beginning (1,341,905) (1,634,520)
Additions 1,994 5,748
Disposals and write-offs (1) (342)
Amortization (51,749) (68,145)
Impairment (loss) reversal of long-lived assets 83,843 9,534
Foreign exchange effect 10,178 (22,300)
Effect of new subsidiary acquisition 7  
Transfers (1,031) 913
Balance at the end of the year 877,928 834,687
Cost, ending 2,213,991 2,176,592
Accumulated amortization and impairment, ending (1,336,063) (1,341,905)
Goodwill [member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 305,397 307,112
Cost, beginning 316,087 630,787
Accumulated amortization and impairment, beginning (10,690) (323,675)
Foreign exchange effect 811 (1,715)
Balance at the end of the year 306,208 305,397
Cost, ending 318,239 316,087
Accumulated amortization and impairment, ending (12,031) (10,690)
Mining rights [member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 507,491 579,551
Cost, beginning 1,810,609 1,859,147
Accumulated amortization and impairment, beginning (1,303,118) (1,279,596)
Disposals and write-offs   (226)
Amortization (48,122) (65,710)
Impairment (loss) reversal of long-lived assets 83,817 9,534
Foreign exchange effect 6,844 (15,433)
Transfers (1,184) (225)
Balance at the end of the year 548,846 507,491
Cost, ending 1,844,122 1,810,609
Accumulated amortization and impairment, ending (1,295,276) (1,303,118)
Other intangible assets [member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 21,799 22,616
Cost, beginning 49,896 53,865
Accumulated amortization and impairment, beginning (28,097) (31,249)
Additions 1,994 5,748
Disposals and write-offs (1) (116)
Amortization (3,627) (2,435)
Impairment (loss) reversal of long-lived assets 26  
Foreign exchange effect 2,523 (5,152)
Effect of new subsidiary acquisition 7  
Transfers 153 1,138
Balance at the end of the year 22,874 21,799
Cost, ending 51,630 49,896
Accumulated amortization and impairment, ending $ (28,756) $ (28,097)
Average annual depreciation rates 5.00% 5.00%