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Income tax and deferred taxes (Details 1) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Current tax liabilities, current | $ 75,402 | $ 75,872
First Category income tax [Member] |  |
Current tax liabilities, current | 45,479 | 50,174
Foreign company income tax [Member] |  |
Current tax liabilities, current | 28,996 | 25,276
Article 21 single tax [Member] |  |
Current tax liabilities, current | $ 927 | $ 422

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- Definition The current amount of current tax liabilities. [Refer: Current tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph n -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_n&doctype=Standard -URIDate 2017-03-09 + Details
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