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v3.19.1

Deferred income tax (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current | $ 16,928 | $ 23,837 | $ 39,444
Deferred | 9,998 | (5,825) | 14,060
Tax expense (income), continuing operations | (26,926) | (18,012) | (53,504)
Income Tax Expense [Member] |  |  |
Current | 12,433 | 18,781 | 32,902
Deferred | 10,069 | (5,984) | 13,808
Tax expense (income), continuing operations | 22,502 | 12,797 | 46,710
Mining Royalties and Special Mining Tax [Member] |  |  |
Current | 4,495 | 5,056 | 6,542
Deferred | (71) | 159 | 252
Tax expense (income), continuing operations | $ 4,424 | $ 5,215 | $ 6,794

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