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MINERAL, ROYALTY AND OTHER INTERESTS (Carrying Amount related to Mineral, Royalty and Other Interests) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | $ 613,329 | $ 593,429
Net Additions (disposals) | 1,403 | 19,900
Ending Cost | 614,732 | 613,329
Opening Accumulated Depletion | 210,544 | 179,066
Depletion | 29,580 | 27,654
Depletion in Ending Inventory | 1,344 | 1,317
Impairment of mineral, royalty and other interests | 9,104 | 2,507
Ending Accumulated Depletion | 249,255 | 210,544
Carrying Amount | 365,477 | 402,785
Other Royalties [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 222,097 | 200,906
Net Additions (disposals) | 2,596 | 21,191
Ending Cost | 224,693 | 222,097
Opening Accumulated Depletion | 115,492 | 106,393
Impairment of mineral, royalty and other interests | 9,104 | 2,507
Ending Accumulated Depletion | 130,492 | 115,492
Carrying Amount | 94,201 | 106,605
Other [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 10,725 | 11,339
Net Additions (disposals) | (1,264) | (614)
Ending Cost | 9,461 | 10,725
Opening Accumulated Depletion | 4,540 | 4,471
Depletion in Ending Inventory | 27 |
Ending Accumulated Depletion | 4,670 | 4,540
Carrying Amount | 4,791 | 6,185
CANADA | Bachelor Lake [Member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 23,972 | 22,671
Net Additions (disposals) | 37 | 1,301
Ending Cost | 24,009 | 23,972
Opening Accumulated Depletion | 19,339 | 14,678
Depletion in Ending Inventory | 21 | 250
Ending Accumulated Depletion | 23,183 | 19,339
Carrying Amount | 826 | 4,633
CANADA | Black Fox [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 37,761 | 37,758
Net Additions (disposals) | 30 | 3
Ending Cost | 37,791 | 37,761
Opening Accumulated Depletion | 24,395 | 22,117
Depletion in Ending Inventory | 183 | 267
Ending Accumulated Depletion | 26,831 | 24,395
Carrying Amount | 10,960 | 13,366
CANADA | Diavik [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 53,111 | 53,111
Ending Cost | 53,111 | 53,111
Opening Accumulated Depletion | 11,792 | 6,273
Ending Accumulated Depletion | 17,872 | 11,792
Carrying Amount | 35,239 | 41,319
CANADA | Ming [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 20,068 | 20,068
Net Additions (disposals) | 2 |
Ending Cost | 20,070 | 20,068
Opening Accumulated Depletion | 8,585 | 7,622
Depletion in Ending Inventory | 276 | 171
Ending Accumulated Depletion | 9,046 | 8,585
Carrying Amount | 11,024 | 11,483
BRAZIL | Aurizona [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 11,033 | 11,000
Net Additions (disposals) |  | 33
Ending Cost | 11,033 | 11,033
Opening Accumulated Depletion | 310 | 310
Ending Accumulated Depletion | 310 | 310
Carrying Amount | 10,723 | 10,723
BRAZIL | Chapada Mine [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 69,528 | 69,520
Net Additions (disposals) |  | 8
Ending Cost | 69,528 | 69,528
Opening Accumulated Depletion | 2,737 |
Ending Accumulated Depletion | 6,502 | 2,737
Carrying Amount | 63,026 | 66,791
MONGOLIA | Hugo North Extension and Heruga Gold Stream [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 35,351 | 42,493
Net Additions (disposals) |  | (7,142)
Ending Cost | 35,351 | 35,351
Carrying Amount | 35,351 | 35,351
BURKINA FASO | Karma Gold [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 26,289 | 21,174
Net Additions (disposals) |  | 5,115
Ending Cost | 26,289 | 26,289
Opening Accumulated Depletion | 2,619 |
Depletion in Ending Inventory | 671 | 524
Ending Accumulated Depletion | 6,203 | 2,619
Carrying Amount | 20,086 | 23,670
TURKEY | Hot Maden [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 5,818 | 5,818
Ending Cost | 5,818 | 5,818
Carrying Amount | 5,818 | 5,818
MEXICO | Santa Elena [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 23,342 | 23,342
Ending Cost | 23,342 | 23,342
Opening Accumulated Depletion | 19,308 | 17,202
Depletion in Ending Inventory | 166 | 105
Ending Accumulated Depletion | 20,466 | 19,308
Carrying Amount | 2,876 | 4,034
ARGENTINA | Yamana Silver Stream [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening Cost | 74,234 | 74,229
Net Additions (disposals) | 2 | 5
Ending Cost | 74,236 | 74,234
Opening Accumulated Depletion | 1,427 |
Ending Accumulated Depletion | 3,680 | 1,427
Carrying Amount | 70,556 | 72,807
Current Period Depletion Expense [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 28,263 | 27,654
Current Period Depletion Expense [member] | Other Royalties [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 5,896 | 6,592
Current Period Depletion Expense [member] | Other [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 103 | 69
Current Period Depletion Expense [member] | CANADA | Bachelor Lake [Member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 3,823 | 4,411
Current Period Depletion Expense [member] | CANADA | Black Fox [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 2,253 | 2,011
Current Period Depletion Expense [member] | CANADA | Diavik [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 6,080 | 5,519
Current Period Depletion Expense [member] | CANADA | Ming [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 185 | 792
Current Period Depletion Expense [member] | BRAZIL | Chapada Mine [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 3,765 | 2,737
Current Period Depletion Expense [member] | BURKINA FASO | Karma Gold [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 2,913 | 2,095
Current Period Depletion Expense [member] | MEXICO | Santa Elena [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 992 | 2,001
Current Period Depletion Expense [member] | ARGENTINA | Yamana Silver Stream [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion | 2,253 | 1,427
Current Period Depletion Expense From Prior Period Depletion In Ending Inventory [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Depletion in Ending Inventory |  | 1,317
Mineral Streams Royalties And Other Interests Accounted For Under IFRS6 [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Carrying Amount | 52,300 | 73,800
Property, plant and equipment [member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Carrying Amount | $ 313,200 | $ 329,000

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