Commitments and Contingencies - Contract Liability (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Revenue Recognized	$ 55,562	$ 25,468	$ 15,887
Franco-Nevada
Business Acquisition [Line Items]
Opening Balance	6,942	7,411	8,150
Revenue Recognized	(560)	(469)	(739)
Closing Balance	6,382	6,942	7,411
Kensington
Business Acquisition [Line Items]
Opening Balance	55,082	25,016
Additions	170,000	130,066	36,020
Revenue Recognized	(182,918)	(100,000)	(26,020)
Closing Balance	42,164	55,082	$ 25,016
Kensington \| December 2023 Prepayment
Business Acquisition [Line Items]
Closing Balance	25,000
Wharf \| September 2023 Prepayment
Business Acquisition [Line Items]
Opening Balance	12,500
Closing Balance		12,500
Rochester \| September 2023 Prepayment
Business Acquisition [Line Items]
Opening Balance	$ 17,500
Closing Balance		$ 17,500

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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