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Basis of presentation for the consolidated financial statements (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items] |  |  |
Property, plant and equipment, (net) | $ 1,737,319 | $ 1,569,906 | $ 1,454,823
Right-of-use assets | 30,024 | 37,164 | $ 0
Other current financial liabilities | 68,955 | 291,128 |
Lease liabilities, current | 5,528 | 7,694 |
Other non-current financial liabilities | 1,899,513 | 1,488,723 |
Lease liabilities, non-current | $ 25,546 | 30,203 |
Balances originally reported [Member] |  |  |
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items] |  |  |
Property, plant and equipment, (net) |  | 1,607,070 |
Right-of-use assets |  | 0 |
Other current financial liabilities |  | 298,822 |
Lease liabilities, current |  | 0 |
Other non-current financial liabilities |  | 1,518,926 |
Lease liabilities, non-current |  | 0 |
Reclassification balances [Member] |  |  |
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items] |  |  |
Property, plant and equipment, (net) |  | (37,164) |
Right-of-use assets |  | 37,164 |
Other current financial liabilities |  | (7,694) |
Lease liabilities, current |  | 7,694 |
Other non-current financial liabilities |  | (30,203) |
Lease liabilities, non-current |  | 30,203 |
Reclassified balances [member] |  |  |
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items] |  |  |
Property, plant and equipment, (net) |  | 1,569,906 |
Right-of-use assets |  | 37,164 |
Other current financial liabilities |  | 291,128 |
Lease liabilities, current |  | 7,694 |
Other non-current financial liabilities |  | 1,488,723 |
Lease liabilities, non-current |  | $ 30,203 |

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- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of non-current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of current financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities; Current financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B13 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B13_b&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_m&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of non-current financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B13 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B13_c&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_m&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_a&doctype=Standard -URIDate 2020-01-01 + Details
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