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Provisions and other non-financial liabilities (Details 4) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | $ 50,846 | $ 40,402 | $ 36,637
Changes in provisions: |  |  |
Additional provisions | 60,923 | 57,110 | 39,560
Provision used | (18,338) | (47,261) | (35,438)
Increase(decrease) in foreign currency exchange | 9 | 128 | (357)
others | 6 | 467 |
Total provisions, final balance | 93,446 | 50,846 | 40,402
Restructuring provision [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance |  | 0 | 0
Changes in provisions: |  |  |
Additional provisions |  |  | 16,327
Provision used |  |  | (16,327)
Increase(decrease) in foreign currency exchange |  |  | 0
Total provisions, final balance |  |  | 0
Legal proceedings provision [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 23,867 | 21,067 | 22,567
Changes in provisions: |  |  |
Additional provisions | 6,352 | 2,800 | 8,500
Provision used | (10,800) | 0 | (10,000)
Increase(decrease) in foreign currency exchange | 0 | 0 | 0
others | 0 | 0 |
Total provisions, final balance | 19,419 | 23,867 | 21,067
Provision for decommissioning, restoration and rehabilitation costs [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 5,890 | 5,890 | 5,890
Changes in provisions: |  |  |
Additional provisions | 21,064 | 0 | 0
Provision used | 0 | 0 | 0
Increase(decrease) in foreign currency exchange | 0 | 0 | 0
others | 0 | 0 |
Total provisions, final balance | 26,954 | 5,890 | 5,890
Miscellaneous other provisions [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 21,089 | 13,445 | 8,180
Changes in provisions: |  |  |
Additional provisions | 33,507 | 54,310 | 14,733
Provision used | (7,538) | (47,261) | (9,111)
Increase(decrease) in foreign currency exchange | 9 | 128 | (357)
others | 6 | 467 |
Total provisions, final balance | $ 47,073 | $ 21,089 | $ 13,445

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_a&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_c&doctype=Standard -URIDate 2017-03-09 + Details
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