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FINANCIAL RISK MANAGEMENT (Investments in financial assets - credit risk) (Details) - Credit risk - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Cash and cash equivalents |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | $ 537,882 | $ 519,965
Other Investments - Current and Non-Current |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 816,157 | 215,273
Fixed Income (time-deposit, zero-coupon bonds, commercial papers) |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 579,917 | 176,470
Deposit certificates |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 451,857 | 160,933
Commercial papers |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 128,060 | 15,537
Bonds and other fixed income |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 233,611 | 38,803
Non - U.S. government securities |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 135,671 | 914
Corporate securities |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | 97,940 | 37,889
Other notes |  |
Disclosure of credit risk exposure [line items] |  |
Maximum exposure to credit risk | $ 2,629 | $ 0

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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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