v3.26.1
Royalty, stream and other interests - Disclosure of detailed information about royalty interests (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Royalty, stream and other interests [Line Items]    
Beginning balance $ 1,113,855 $ 1,174,298
Additions 36,879 73,449
Exercise of a buy-down right (2,051)  
Depletion (35,770) (32,607)
Impairment (5,495) (49,558)
Foreign exchange revaluation impact 32,608 (51,727)
Ending balance 1,140,026 1,113,855
Royalty interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 637,413 695,356
Additions 13,839 50,121
Exercise of a buy-down right (2,051)  
Depletion (13,234) (12,208)
Impairment (5,495) (49,558)
Foreign exchange revaluation impact 28,964 (46,298)
Ending balance 659,436 637,413
Stream interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 465,671 468,171
Additions 23,040 23,328
Exercise of a buy-down right 0  
Depletion (22,536) (20,399)
Impairment 0 0
Foreign exchange revaluation impact 3,644 (5,429)
Ending balance 469,819 465,671
Offtake interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 10,771 10,771
Additions 0 0
Exercise of a buy-down right 0  
Depletion 0 0
Impairment 0 0
Foreign exchange revaluation impact 0 0
Ending balance 10,771 10,771
Producing [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 424,963  
Cost 1,022,000 951,973
Accumulated depletion and impairments (585,924) (527,010)
Ending balance 436,076 424,963
Producing [Member] | Royalty interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 86,526  
Cost 451,288 390,283
Accumulated depletion and impairments (333,704) (303,757)
Ending balance 117,584 86,526
Producing [Member] | Stream interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 338,437  
Cost 570,712 561,690
Accumulated depletion and impairments (252,220) (223,253)
Ending balance 318,492 338,437
Producing [Member] | Offtake interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 0  
Cost 0 0
Accumulated depletion and impairments 0 0
Ending balance 0 0
Development [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 384,870  
Cost 510,911 533,075
Accumulated depletion and impairments (131,164) (148,205)
Ending balance 379,747 384,870
Development [Member] | Royalty interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 283,384  
Cost 336,640 352,216
Accumulated depletion and impairments (72,475) (68,832)
Ending balance 264,165 283,384
Development [Member] | Stream interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 101,486  
Cost 174,271 160,017
Accumulated depletion and impairments (58,689) (58,531)
Ending balance 115,582 101,486
Development [Member] | Offtake interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 0  
Cost 0 20,842
Accumulated depletion and impairments 0 (20,842)
Ending balance 0 0
Exploration and evaluation [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 304,022  
Cost 330,512 311,916
Accumulated depletion and impairments (6,309) (7,894)
Ending balance 324,203 304,022
Exploration and evaluation [Member] | Royalty interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 267,503  
Cost 283,473 274,874
Accumulated depletion and impairments (5,786) (7,371)
Ending balance 277,687 267,503
Exploration and evaluation [Member] | Stream interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 25,748  
Cost 36,268 26,271
Accumulated depletion and impairments (523) (523)
Ending balance 35,745 25,748
Exploration and evaluation [Member] | Offtake interests [Member]    
Royalty, stream and other interests [Line Items]    
Beginning balance 10,771  
Cost 10,771 10,771
Accumulated depletion and impairments 0 0
Ending balance $ 10,771 $ 10,771