Property, plant and equipment (Schedule of Property plant and equipment table) (Details) - CAD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
$ 3,286,515
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
9,332
|
$ 10,799
|
| Additions |
5,366
|
1,101
|
| Depreciation charge |
(3,060)
|
(2,514)
|
| Transfers |
1,341
|
(54)
|
| Right-of-use assets - end of year |
12,979
|
9,332
|
| Property, plant and equipment - End of year |
3,325,077
|
3,286,515
|
| Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
9,731,347
|
9,507,370
|
| Additions |
333,025
|
211,635
|
| Transfers |
(1,341)
|
54
|
| Change in reclamation provision |
(33,908)
|
(54,991)
|
| Disposals |
(64,935)
|
(4,769)
|
| Effect of movements in exchange rates |
(26,294)
|
72,048
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
9,937,894
|
9,731,347
|
| Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(6,454,164)
|
(6,149,397)
|
| Depreciation charge |
294,384
|
274,593
|
| Change in reclamation provision |
28,333
|
37,683
|
| Disposals |
61,184
|
3,352
|
| Effect of movements in exchange rates |
33,235
|
(71,209)
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
(6,625,796)
|
(6,454,164)
|
| Land and buildings [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
1,700,319
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
7,705
|
8,326
|
| Additions |
2,031
|
696
|
| Depreciation charge |
(1,623)
|
(1,291)
|
| Transfers |
1,365
|
(26)
|
| Right-of-use assets - end of year |
9,478
|
7,705
|
| Property, plant and equipment - End of year |
1,615,702
|
1,700,319
|
| Land and buildings [Member] | Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
5,285,231
|
5,213,324
|
| Additions |
0
|
206
|
| Transfers |
95,360
|
72,014
|
| Change in reclamation provision |
(33,908)
|
(54,991)
|
| Disposals |
(32,630)
|
(210)
|
| Effect of movements in exchange rates |
(31,085)
|
54,888
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
5,282,968
|
5,285,231
|
| Land and buildings [Member] | Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(3,592,617)
|
(3,412,990)
|
| Depreciation charge |
172,805
|
164,525
|
| Change in reclamation provision |
28,333
|
37,683
|
| Disposals |
30,600
|
14
|
| Effect of movements in exchange rates |
29,745
|
(52,799)
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
(3,676,744)
|
(3,592,617)
|
| Plant and equipment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
738,741
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
507
|
401
|
| Additions |
307
|
385
|
| Depreciation charge |
(500)
|
(251)
|
| Transfers |
(24)
|
(28)
|
| Right-of-use assets - end of year |
290
|
507
|
| Property, plant and equipment - End of year |
759,879
|
738,741
|
| Plant and equipment [Member] | Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
3,016,140
|
2,897,605
|
| Additions |
53
|
734
|
| Transfers |
137,244
|
105,291
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
(22,759)
|
(3,004)
|
| Effect of movements in exchange rates |
(8,871)
|
15,514
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
3,121,807
|
3,016,140
|
| Plant and equipment [Member] | Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(2,277,906)
|
(2,159,021)
|
| Depreciation charge |
114,340
|
105,545
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
21,207
|
2,064
|
| Effect of movements in exchange rates |
8,821
|
(15,404)
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
(2,362,218)
|
(2,277,906)
|
| Furniture and fixtures [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
7,984
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
1,120
|
2,072
|
| Additions |
3,028
|
20
|
| Depreciation charge |
(937)
|
(972)
|
| Transfers |
0
|
0
|
| Right-of-use assets - end of year |
3,211
|
1,120
|
| Property, plant and equipment - End of year |
12,081
|
7,984
|
| Furniture and fixtures [Member] | Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
94,075
|
90,719
|
| Additions |
3
|
61
|
| Transfers |
8,650
|
4,299
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
(9,390)
|
(1,300)
|
| Effect of movements in exchange rates |
(161)
|
296
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
93,177
|
94,075
|
| Furniture and fixtures [Member] | Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(87,211)
|
(83,676)
|
| Depreciation charge |
6,625
|
4,523
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
9,377
|
1,274
|
| Effect of movements in exchange rates |
152
|
(286)
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
(84,307)
|
(87,211)
|
| Under constructions [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
228,867
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
0
|
0
|
| Additions |
0
|
0
|
| Depreciation charge |
0
|
0
|
| Transfers |
0
|
0
|
| Right-of-use assets - end of year |
0
|
0
|
| Property, plant and equipment - End of year |
318,362
|
228,867
|
| Under constructions [Member] | Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
265,665
|
237,280
|
| Additions |
332,888
|
210,172
|
| Transfers |
(242,595)
|
(181,550)
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
(156)
|
(255)
|
| Effect of movements in exchange rates |
(28)
|
18
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
355,774
|
265,665
|
| Under constructions [Member] | Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(36,798)
|
(36,798)
|
| Depreciation charge |
614
|
0
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
0
|
0
|
| Effect of movements in exchange rates |
0
|
0
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
(37,412)
|
(36,798)
|
| Exploration and evaluation [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
610,604
|
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Right-of-use assets - beginning of year |
0
|
0
|
| Additions |
0
|
0
|
| Depreciation charge |
0
|
0
|
| Transfers |
0
|
0
|
| Right-of-use assets - end of year |
0
|
0
|
| Property, plant and equipment - End of year |
619,053
|
610,604
|
| Exploration and evaluation [Member] | Cost [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
1,070,236
|
1,068,442
|
| Additions |
81
|
462
|
| Transfers |
0
|
0
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
0
|
0
|
| Effect of movements in exchange rates |
13,851
|
1,332
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
1,084,168
|
1,070,236
|
| Exploration and evaluation [Member] | Accumulated depreciation and impairment [Member] |
|
|
| Disclosure Of Property Plant And Equipment [Line Items] |
|
|
| Property, plant and equipment - Beginning of year |
(459,632)
|
(456,912)
|
| Depreciation charge |
0
|
0
|
| Change in reclamation provision |
0
|
0
|
| Disposals |
0
|
0
|
| Effect of movements in exchange rates |
(5,483)
|
(2,720)
|
| Disclosure of quantitative information about right of use assets [Abstract] |
|
|
| Property, plant and equipment - End of year |
$ (465,115)
|
$ (459,632)
|