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EXPENSES | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of expenses [Abstract] |
Disclosure of expenses [text block] | 6. Expenses (a) Operating expenses by nature
| Year ended December 31
(in millions of U.S. dollars) |  |  | 2017 | 2016
Operating expenses by nature |  |  |  |
Raw materials and consumables |  |  | 143.0 | 127.6
Salaries and employee benefits |  |  | 93.3 | 84.9
Contractors |  |  | 43.6 | 35.0
Repairs and maintenance |  |  | 23.9 | 21.1
General and administrative |  |  | 20.2 | 14.8
Operating leases |  |  | 2.9 | 7.7
Royalties |  |  | 8.4 | 6.3
Drilling and analytical |  |  | 1.3 | 1.3
Other |  |  | 3.3 | 4.3
Total production expenses |  |  | 339.9 | 303.0
Less: Production expenses capitalized |  |  | (23.0) | (39.7)
Less: Change in inventories and work-in-progress |  |  | 4.1 | 12.2
Total operating expenses |  |  | 321.0 | 275.5
(b) Finance costs and income
| Year ended December 31
(in millions of U.S. dollars) |  |  | 2017 | 2016
Finance costs |  |  |  |
Interest on senior unsecured notes |  |  | 54.4 | 54.0
Interest on Credit Facility |  |  | 5.9 | 0.6
Accretion expense on decommissioning obligations (Note 18) |  |  | 1.3 | 1.4
Gain on modification of long-term debt (Note 12) |  |  | (3.3) | -
Other finance costs |  |  | 6.2 | 3.3
|  |  | 64.5 | 59.3
Less: amounts included in cost of qualifying assets |  |  | (51.3) | (49.4)
Total finance costs |  |  | 13.2 | 9.9
Finance income |  |  |  |
Interest income |  |  | 1.1 | 1.4
(c) Other gains (losses)
| Year ended December 31
(in millions of U.S. dollars) |  |  | 2017 | 2016
Other GAINS (losses) |  |  |  |
Unrealized gain on share purchase warrants |  |  | 1.2 | 0.2
Gain on foreign exchange |  |  | 43.8 | 12.0
Gain on disposal of El Morro stream |  |  | 33.0 | -
Other gain on disposal of assets |  |  | 0.3 | 0.1
(Loss) gain on revaluation of investments |  |  | (0.2) | 0.5
Unrealized loss on revaluation of gold stream obligation (Note 13) |  |  | (21.8) | (31.1)
Settlement and (loss) gain on revaluation of gold price option contracts |  |  | (13.9) | 10.5
Loss on revaluation of copper forward contracts and copper price option contracts |  |  | (4.4) | 0.3
Other |  |  | 1.2 | (0.2)
Total other gains (losses) |  |  | 39.2 | (7.7)

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