v3.26.1
Mineral, Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 01, 2025
Dec. 31, 2025
Dec. 31, 2024
Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   $ 29,374  
Balance at end of period   81,270 $ 29,374
Mining equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   221,269  
Balance at end of period   375,066 221,269
Mineral Properties      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   443,847  
Balance at end of period   718,418 443,847
Development costs   64,700 57,900
Projects in Progres      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   501,057  
Balance at end of period   338,705 501,057
Equipment & Other Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   17,762  
Balance at end of period   22,377 17,762
Deposits On Projects      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   12,700  
Balance at end of period   2,773 12,700
Mine Closure Costs      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   15,762  
Balance at end of period   11,610 15,762
Right-of-Use Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   16,723  
Balance at end of period   23,835 16,723
Balance at beginning of period   1,258,494  
Capitalized borrowing costs   31,800 36,467
Change in estimates   (4,859) 7,890
Balance at end of period   1,574,054 1,258,494
Increase (decrease) through transfers from construction in progress, property, plant and equipment     (10,100)
Tucumã (Brazil)      
Disclosure of detailed information about property, plant and equipment [line items]      
Increase (decrease) through transfers from construction in progress, property, plant and equipment $ (388,100)    
Cost | Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   36,593 37,246
Additions   1,794 3,888
Disposals   0 0
Transfers (Note 8)   50,050 4,705
Foreign exchange   5,945 (9,246)
Balance at end of period   94,382 36,593
Cost | Mining equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   294,944 285,489
Additions   27,939 53,331
Disposals   (401) (3,160)
Transfers (Note 8)   133,601 32,316
Foreign exchange   40,893 (73,032)
Balance at end of period   496,976 294,944
Cost | Mineral Properties      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   643,758 697,808
Additions   101,503 82,063
Disposals   0 (940)
Transfers (Note 8)   182,516 30,585
Foreign exchange   84,505 (165,758)
Balance at end of period   1,012,282 643,758
Cost | Projects in Progres      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   501,057 419,657
Additions   104,520 145,333
Capitalized borrowing costs   31,773 36,467
Disposals   0 (5)
Transfers (Note 8)   (343,387) (2,158)
Foreign exchange   44,742 (98,237)
Balance at end of period   338,705 501,057
Cost | Equipment & Other Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   26,972 26,613
Additions   4,513 3,986
Disposals   (16) (253)
Transfers (Note 8)   254 2,929
Foreign exchange   3,233 (6,303)
Balance at end of period   34,956 26,972
Cost | Deposits On Projects      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   12,700 49,542
Additions   12,318 25,991
Disposals   0 0
Transfers (Note 8)   (23,034) (55,906)
Foreign exchange   789 (6,927)
Balance at end of period   2,773 12,700
Cost | Mine Closure Costs      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   21,336 18,509
Additions   0 0
Change in estimates   (4,859) 7,890
Disposals   0 0
Transfers (Note 8)   0 0
Foreign exchange   2,594 (5,063)
Balance at end of period   19,071 21,336
Cost | Right-of-Use Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   49,995 49,329
Additions   25,007 18,012
Disposals   (4,871) (4,450)
Transfers (Note 8)   0 (789)
Foreign exchange   6,374 (12,107)
Balance at end of period   76,505 49,995
Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   1,587,355 1,584,193
Additions   277,594 332,604
Capitalized borrowing costs   31,773  
Disposals   (5,288) (8,808)
Transfers (Note 8)   0 11,682
Foreign exchange   189,075 (376,673)
Balance at end of period   2,075,650 1,587,355
Accumulated depreciation | Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (7,219) (6,984)
Additions   (4,985) (2,022)
Disposals   0 0
Foreign exchange   (908) 1,787
Balance at end of period   (13,112) (7,219)
Accumulated depreciation | Mining equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (73,675) (68,917)
Additions   (39,057) (25,707)
Disposals   325 2,950
Foreign exchange   (9,503) 17,999
Balance at end of period   (121,910) (73,675)
Accumulated depreciation | Mineral Properties      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (199,911) (209,939)
Additions   (68,891) (41,025)
Disposals   0 0
Foreign exchange   (25,062) 51,053
Balance at end of period   (293,864) (199,911)
Accumulated depreciation | Projects in Progres      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   0 0
Additions   0 0
Disposals   0 0
Foreign exchange   0 0
Balance at end of period   0 0
Accumulated depreciation | Equipment & Other Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (9,210) (9,368)
Additions   (2,317) (2,001)
Disposals   0 62
Foreign exchange   (1,052) 2,097
Balance at end of period   (12,579) (9,210)
Accumulated depreciation | Mine Closure Costs      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (5,574) (6,316)
Additions   (1,180) (732)
Disposals   0 0
Foreign exchange   (707) 1,474
Balance at end of period   (7,461) (5,574)
Accumulated depreciation | Right-of-Use Assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (33,272) (30,671)
Additions   (18,167) (14,069)
Disposals   3,057 3,537
Foreign exchange   (4,288) 7,931
Balance at end of period   (52,670) (33,272)
Accumulated depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of period   (328,861) (332,195)
Additions   (134,597) (85,556)
Disposals   3,382 6,549
Foreign exchange   (41,520) 82,341
Balance at end of period   $ (501,596) $ (328,861)