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v3.19.1

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | $ 17,248 | $ 13,861
Deferred tax liabilities |  |  | (48,692) | (42,518)
Net deferred tax liabilities |  |  | (31,444) | (28,657)
Net deferred tax liabilities | $ (28,657) | $ (24,874) | (31,444) | (28,657)
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |  |  |
Beginning balance | 28,657 | 24,874 |  |
Deferred income tax expense through income statement | 2,787 | 3,783 |  |
Ending balance | $ 31,444 | $ 28,657 |  |
Reclamation and closure cost obligation [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | 4,594 | 3,996
Carried forward tax loss [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | 3,386 | 1,079
Accounts payable and accrued liability [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | 5,642 | 4,235
Deductibility of resource taxes [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | 3,436 | 3,597
Other deferred tax assets [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax assets |  |  | 190 | 954
Mineral Properties [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax liabilities |  |  | (34,541) | (30,413)
Mining and foreign withholding taxes [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax liabilities |  |  | (8,412) | (6,973)
Equipment and Building [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax liabilities |  |  | (4,413) | (4,658)
Other deferred tax liabilities [member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Deferred tax liabilities |  |  | $ (1,326) | $ (474)

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