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STREAM AND ROYALTY INTERESTS, NET - Impairments (Details) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 11, 2016 oz | Dec. 22, 2014 USD ($) | Mar. 31, 2016 USD ($) item | Sep. 30, 2014 USD ($) item | Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2017 USD ($) | Dec. 20, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Impairments of stream and royalty interests |  |  |  |  | $ 96,118 | $ 28,339 |  |  |  |
Impairment of stream and royalty interests and royalty receivables |  |  |  |  | 98,588 | 31,335 |  |  |  |
Value of stream and royalty interests, net |  |  |  |  | 2,848,087 |  | $ 2,892,256 |  |  |
Royalty receivables |  |  |  |  | 17,990 |  | $ 23,461 |  |  |
Return of advance payment |  |  |  |  |  | 10,000 |  |  |  |
Phoenix Gold |  |  |  |  |  |  |  |  |  |
Impairments of stream and royalty interests |  |  |  |  | 75,702 |  |  |  |  |
Value of stream and royalty interests, net |  |  | $ 0 |  |  |  |  | $ 0 |  |
Inata |  |  |  |  |  |  |  |  |  |
Impairments of stream and royalty interests |  |  |  |  | 11,982 |  |  |  |  |
Allowance for royalty receivables |  |  |  |  | 2,855 |  |  |  |  |
Royalty interests acquired (as a percent) |  |  |  |  |  |  | 2.50% |  |  |
Value of stream and royalty interests, net |  |  | 0 |  |  |  |  |  | $ 12,000 |
Royalty receivables |  |  |  |  |  |  | $ 2,800 |  |  |
Wolverine |  |  |  |  |  |  |  |  |  |
Impairments of stream and royalty interests |  |  |  |  | 5,307 | 25,967 |  |  |  |
Allowance for royalty receivables |  |  |  |  | (385) | 2,996 |  |  |  |
Value of stream and royalty interests, net |  |  | 0 |  |  | 5,300 |  |  |  |
Royalty receivables |  |  |  |  |  | 3,000 |  |  |  |
Other |  |  |  |  |  |  |  |  |  |
Impairments of stream and royalty interests |  |  | 3,100 | $ 1,800 | 3,127 | $ 2,372 |  |  |  |
Value of stream and royalty interests, net |  |  | $ 0 | $ 0 |  |  |  |  |  |
Tulsequah |  |  |  |  |  |  |  |  |  |
Value of stream and royalty interests, net |  | $ 10,000 |  |  |  |  |  |  |  | $ 0
Return of advance payment |  | 10,000 |  |  |  |  |  |  |  |
Direct transaction costs |  | $ 600 |  |  |  |  |  |  |  |
Initial Royalty | Phoenix Gold |  |  |  |  |  |  |  |  |  |
Royalty interests acquired (as a percent) | 6.30% |  |  |  |  |  |  |  |  |
Gold delivered (in ounces) | oz | 135,000 |  |  |  |  |  |  |  |  |
Subsequent Royalty | Phoenix Gold |  |  |  |  |  |  |  |  |  |
Royalty interests acquired (as a percent) | 3.15% |  |  |  |  |  |  |  |  |
Production stage royalty interests |  |  |  |  |  |  |  |  |  |
Value of stream and royalty interests, net |  |  |  |  | 378,115 |  | 355,380 |  |  |
Production stage royalty interests | Other |  |  |  |  |  |  |  |  |  |
Value of stream and royalty interests, net |  |  |  |  | 170,670 |  | 145,685 |  |  |
Number of properties | item |  |  | 1 | 1 |  |  |  |  |  |
Exploration stage royalty interests |  |  |  |  |  |  |  |  |  |
Value of stream and royalty interests, net |  |  |  |  | $ 154,186 |  | $ 152,746 |  |  |
Exploration stage royalty interests | Other |  |  |  |  |  |  |  |  |  |
Number of properties | item |  |  | 3 | 1 |  |  |  |  |  |
Minimum | Wolverine |  |  |  |  |  |  |  |  |  |
Royalty interests acquired (as a percent) |  |  |  |  |  |  | 0.00% |  |  |
Maximum | Wolverine |  |  |  |  |  |  |  |  |  |
Royalty interests acquired (as a percent) |  |  |  |  |  |  | 9.445% |  |  |

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