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FINANCIAL RISK MANAGEMENT - Credit Risk (Details) - Credit risk - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | $ 980,879 | $ 597,191
Cash and cash equivalents |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 860,637 | 503,647
Trade receivables |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 38,456 | 54,164
Value Added Tax (VAT) Receivable [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 30,279 | 21,416
Restricted cash |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 35,288 | 2,339
Other current and non-current financial assets |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | $ 16,219 | $ 15,625

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 35K -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 36 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_a&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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