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Acquisitions and Other Transactions (Details) $ / shares in Units, $ in Millions |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
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Jul. 26, 2023 USD ($) shares | Jul. 26, 2023 CAD ($) shares | Jul. 06, 2023 USD ($) | Jul. 05, 2023 USD ($) shares | Jul. 05, 2023 CAD ($) $ / shares shares | Jul. 01, 2023 USD ($) | Jun. 29, 2023 USD ($) | Jun. 27, 2023 USD ($) | Jun. 15, 2023 USD ($) item | Jun. 08, 2023 USD ($) | Apr. 14, 2023 USD ($) | Mar. 08, 2023 USD ($) | Feb. 22, 2023 USD ($) item | Jul. 18, 2022 USD ($) | Feb. 19, 2019 USD ($) | Feb. 19, 2019 CAD ($) | Apr. 30, 2022 | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Feb. 21, 2019 USD ($) | Feb. 21, 2019 CAD ($)
New Royalties with EMX Royalty Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint acquisition agreement term |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of contribution in joint acquisition |  |  |  |  |  |  |  | 55.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions made |  |  |  |  |  |  |  | $ 5,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Resulting royalty interests |  |  |  |  |  |  |  | 0.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New Royalties with EMX Royalty Corporation | EMX Royalty Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of contribution in joint acquisition |  |  |  |  |  |  |  | 45.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions made |  |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Resulting royalty interests |  |  |  |  |  |  |  | 0.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Pascua-Lama Mine - Chile |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gold price per ounce |  |  |  |  |  | 800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NSR (gold) on such property held |  |  |  |  |  | 2.70% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NSR (copper) on such property held |  |  |  |  |  | 0.54% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Pascua-Lama Mine - Chile | Major Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Black Horse Chromite Deposit in the Ring of Fire - Ontario, Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR under option to buy-down |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Volcan Gold Project - Chile |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 15,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
G Mining Ventures, Tocantinzinho Gold Project, Brazil |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount disbursed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 93,100,000 |  | $ 93,100,000 |  |  |
Amount of total commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 183,800,000 |  | 183,800,000 |  |  |
Remaining stream commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 66,200,000 |  | 66,200,000 |  |  |
Secured term loan receivable |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000.0 |  |  |  |  |  |  |  |  |
Amount of funding |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000.0 |  |  |  |  |  | $ 0 |  |  |
Caserones Royalty, Chile |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  | $ 7,300,000 |  |  |  |  | $ 2,100,000 |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.4582% |  |  | 0.5702% |  |  |
Additional NSR acquired |  |  |  |  |  |  | 0.086% |  |  |  |  | 0.026% |  |  |  |  |  |  |  | 0.112% |  |  |
Exploration Properties - Nevada and Arizona, U.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of royalties acquired | item |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gold Royalties Interest Acquisition, Rebecca Gold Project | Major Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,600,000 |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |
Contingent consideration recognised as of acquisition date |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |
Cash transferred |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,300,000 |  |  |  |  |  |  |  |  |  |
Number of royalties acquired | item |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Marathon Gold Corporation, Valentine Gold Project Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  | $ 45,000,000.0 |  |  |  |  |  |  |  |  |  |  |  | $ 13,700,000 | $ 18.0
Percentage of NSR |  |  |  |  |  |  |  |  |  | 1.50% |  |  | 2.00% |  |  |  |  |  |  | 3.00% |  |  |
Additional NSR acquired |  |  |  | 1.50% | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR before buy-back |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of buy-back of NSR |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Cash inflow from sale of interests in gold mining project |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000,000.0 |  |  |  |  |  |  |  |  |  |
Option to buy back of NSR (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |
Number of shares acquired | shares |  |  |  | 6,578,947 | 6,578,947 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per share | $ / shares |  |  |  |  | $ 0.76 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share subscription |  |  |  | $ 3,800,000 | $ 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marathon Gold Corporation, Valentine Gold Project Acquisition | Major Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000,000.0 |  |  |  |  |  |  |  |  |  |
Percentage of NSR |  |  | 1.50% |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |
Percentage of holding interest in properties |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |
Cash inflow from sale of interests in gold mining project |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,700,000 | $ 18.0 |  |  |  |  |  |  |
Option to buy back of NSR (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |
Share subscription |  |  |  | $ 3,800,000 | $ 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Kerr-Addison Property and Share Subscription with Gold Candle Ltd. - Ontario, Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price | $ 1.10 |  |  |  |  |  |  |  |  |  | $ 10,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of NSR | 1.00% | 1.00% |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of shares acquired | shares | 5,454,546 | 5,454,546 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share subscription | $ 4,600,000 | $ 6.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty on Kerr-Addison Property and Share Subscription with Gold Candle Ltd. - Ontario, Canada | Major Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share subscription | $ 4,600,000 | $ 6.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mineral Rights With Continental Resources Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total contributions made |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,500,000 | $ 1,800,000 | $ 5,900,000 | $ 3,600,000 |  |
Cumulative investment in royalty acquisition venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 446,500,000 |  | 446,500,000 |  |  |
Mineral Rights With Continental Resources Inc | Top |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total cumulative investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 73,500,000 |  | $ 73,500,000 |  |  |

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