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Financial instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Financial instruments [Line Items] |  |  |
Other non-current financial assets | $ 8,778 | $ 17,131 | $ 0
Other current financial assets | 505,490 | 312,721 |
Hedging assets [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other non-current financial assets | 3,918 | 13,425 |
Other current financial assets | 17,270 | 18,238 |
Financial assets at amortised cost, category [member] |  |  |
Financial instruments [Line Items] |  |  |
Other non-current financial assets | 75 | 75 |
Other current financial assets | 485,689 | 291,790 |
Financial assets at fair value through profit or loss, classified as held for trading, category [member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets | 2,531 | 2,693 |
Financial assets measured at fair value through other comprehensive income, category [member] |  |  |
Financial instruments [Line Items] |  |  |
Other non-current financial assets | $ 4,785 | $ 3,631 |

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- Definition The amount of current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets; Current financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_d&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of non-current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_d&doctype=Standard -URIDate 2019-03-27 + Details
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