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Financial Expenses (Details) - USD ($) | 12 Months Ended | 36 Months Ended | 60 Months Ended | 72 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2013 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2011
Disclosure Of Financial Expenses [Line Items] |  |  |  |  |  |  |  |  |  |
Interest on mining royalties (a) | $ 370,159,000 | $ 144,815,000 | $ 0 |  |  |  |  |  |  |
Interest on senior unsecured credit facility (Note 11(a)) | 49,551,000 | 44,678,000 | 51,155,000 |  |  |  |  |  |  |
Other financial expenses (b) | 6,492,000 | 10,934,000 | 1,880,000 |  |  |  |  |  |  |
Interest on shareholder loans (Note 11(b)) | 0 | 7,992,000 | 19,836,000 |  |  |  |  |  |  |
Extinguishment debt - debt issuance cost | 1,902,000 | 6,266,000 | 0 |  |  |  |  |  |  |
Amortisation of debt issuance costs | 2,419,000 | 4,479,000 | 8,901,000 |  |  |  |  |  |  |
Capitalized Interest | (3,790,000) | (2,252,000) | (1,334,000) |  |  |  |  |  |  |
Finance costs | 38,456,000 | 34,623,000 | $ 31,580,000 |  |  |  |  |  |  |
Interest on royalty penalties for december two thousand six through two thousand eight | 6.1 | 141,700,000 |  |  |  |  |  |  |  |
Interest on Net Asset Tax |  | 3,100,000 |  |  |  |  |  |  |  |
Interest On Royalty Penalties For December Two Thousand Nine Through Two Thousand Thirteen |  |  |  |  |  |  |  |  | $ 218,700,000 |
Interest On SMTs For December Two Thousand Eleven Through Two Thousand Thirteen |  |  |  |  |  |  |  | $ 51,000 |  |
Net asset tax relating to royalties |  | $ 33,600,000 |  | $ 12,100,000 | $ 12,100,000 | $ 12,100,000 | $ 12,100,000 |  |  |
Deferred Interest On Royalty Installment Program For January Two Thousand Nine Through September Two Thousand Eleven | $ 5,300,000 |  |  |  |  |  |  |  |  |
Interest On Tax Credit |  |  |  | $ 1,300,000 |  |  |  |  |  |
Income Tax Related to Disputed Mining |  |  |  |  |  |  |  |  |  | $ 75,700,000

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