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Provisions and other non-financial liabilities (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | $ 145,255 | $ 138,019 | $ 93,446
Changes in provisions: |  |  |
Additional provisions | 154,581 | 154,425 | 184,064
Provision used | (127,624) | (151,581) | (139,506)
Increase(decrease) in foreign currency exchange | (2,482) | (24) | 0
Others | (2,947) | 4,416 | 15
Total Increase (decreases) | 21,528 | 7,236 | 44,573
Total provisions, final balance | 166,783 | 145,255 | 138,019
Legal proceedings provision [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 14,924 | 14,862 | 19,419
Changes in provisions: |  |  |
Additional provisions | 62,922 | 4,111 | 1,000
Provision used | (67,685) | (4,049) | (5,557)
Increase(decrease) in foreign currency exchange | 4 | 0 | 0
Others | 0 | 0 | 0
Total Increase (decreases) | (4,759) | 62 | (4,557)
Total provisions, final balance | 10,165 | 14,924 | 14,862
Provision for decommissioning, restoration and rehabilitation costs [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 33,238 | 28,822 | 26,954
Changes in provisions: |  |  |
Additional provisions | 30,974 | 0 | 1,820
Provision used | 0 | 0 | 0
Increase(decrease) in foreign currency exchange | 0 | 0 | 0
Others | (2,947) | 4,416 | 48
Total Increase (decreases) | 28,027 | 4,416 | 1,868
Total provisions, final balance | 61,265 | 33,238 | 28,822
Miscellaneous other provisions [member] |  |  |
Disclosure of Provisions and other non-financial liabilities [Line Items] |  |  |
Total provisions, initial balance | 97,093 | 94,335 | 47,073
Changes in provisions: |  |  |
Additional provisions | 60,685 | 150,314 | 181,244
Provision used | (59,939) | (147,532) | (133,949)
Increase(decrease) in foreign currency exchange | (2,486) | (24) | 0
Others | 0 | 0 | (33)
Total Increase (decreases) | (1,740) | 2,758 | 47,262
Total provisions, final balance | $ 95,353 | $ 97,093 | $ 94,335

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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 2020-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84&doctype=Standard -URIDate 2020-01-01 + Details
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