Mineral interests - (Details) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Mineral interests
As at beginning	$ 1,773,053
As at ending	1,634,047	$ 1,773,053
Depletable mineral interest	1,035,000	1,168,000
Non-depletable mineral interest	599,000	605,000
Agbaou Royalty
Mineral interests
Consideration to acquire royalty		15,500
Cost
Mineral interests
As at beginning	2,193,414	1,567,111
Additions	3,766	629,303
Disposals	(366)	(3,000)
As at ending	2,196,814	2,193,414
Accumulated depletion and impairments
Mineral interests
As at beginning	(420,361)	(338,940)
Depletion	(35,360)	(66,137)
Impairment charges	(107,046)	(15,284)
As at ending	(562,767)	(420,361)
Mineral interests
Mineral interests
Additions	0	166,000
Disposals		0
Impairment charges	0
Non-depletable mineral interest	300,000	300,000
Mineral Streams
Mineral interests
As at beginning	1,020,664
As at ending	895,536	1,020,664
Mineral Streams \| Cost
Mineral interests
As at beginning	1,357,954	1,281,254
Additions	0	76,700
Disposals	0	0
As at ending	1,357,954	1,357,954
Mineral Streams \| Accumulated depletion and impairments
Mineral interests
As at beginning	(337,290)	(284,095)
Depletion	(22,520)	(44,747)
Impairment charges	(102,608)	(8,448)
As at ending	(462,418)	(337,290)
Royalties
Mineral interests
As at beginning	752,389
As at ending	738,511	752,389
Royalties \| Cost
Mineral interests
As at beginning	835,460	285,857
Additions	3,766	552,603
Disposals	(366)	(3,000)
As at ending	838,860	835,460
Impairment amount	4,400
Royalties \| Accumulated depletion and impairments
Mineral interests
As at beginning	(83,071)	(54,845)
Depletion	(12,840)	(21,390)
Impairment charges	(4,438)	(6,836)
As at ending	(100,349)	(83,071)
Nevada Copper \| Cost
Mineral interests
Impairment amount	83,900
Moss \| Cost
Mineral interests
Impairment amount	18,700
Stawell
Mineral interests
Consideration to acquire royalty		16,600
Prieska
Mineral interests
Consideration to acquire royalty	$ 3,400	3,500
Nueva Recuperada
Mineral interests
Consideration to acquire royalty		2,200
Johnson Camp Mine Royalty
Mineral interests
Consideration to acquire royalty		5,500
Renard \| Mineral interest
Mineral interests
Impairment amount		8,500
Beaufor royalty \| Mineral interest
Mineral interests
Impairment amount		$ 6,800

The amount of assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 6
-IssueDate 2023-01-01
-Paragraph 24
-Subparagraph b
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-URIDate 2023-03-23

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The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2023-01-01
-Paragraph 130
-Subparagraph d
-Clause ii
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-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2023-01-01
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The amount of additions to exploration and evaluation assets.

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The amount of consideration to acquire royalty

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The amount of depletable assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource.

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The amount of depletion of exploration and evaluation assets.

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The amount of decrease in exploration and evaluation assets resulting from disposals.

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The amount of non-depletable assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource.

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