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Finance costs and finance revenues (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of business combination [Line Items] |  |  |
Beginning balance | $ 19,343 | $ 16,994 | $ 23,026
Variation of the fair value in results | (1,773) | 2,349 | (6,032)
Final balance | $ 17,570 | $ 19,343 | $ 16,994

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- Definition The amount of contingent liabilities recognised in a business combination. [Refer: Contingent liabilities [member]; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B67 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B67_c&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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