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FINANCIAL RISK MANAGEMENT (Liquidity risk) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Lease liabilities | $ 394,473 | $ 457,727
Net debt | 371,000 |
2021 |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Lease liabilities | 56,929 | 55,670
Thereafter |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Lease liabilities | 161,145 | $ 204,101
Liquidity risk |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Net debt | 371,500 |
Liquidity risk | 2021 |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Borrowings | 396,000 |
Interest to be accrued | 26,000 |
Trade payables and other liabilities | 1,024,000 |
Lease liabilities | 42,000 |
Total | 1,488,000 |
Liquidity risk | 2022 |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Borrowings | 660,000 |
Interest to be accrued | 17,000 |
Trade payables and other liabilities | 13,000 |
Lease liabilities | 42,000 |
Total | 732,000 |
Liquidity risk | 2023 |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Borrowings | 137,000 |
Interest to be accrued | 9,000 |
Trade payables and other liabilities | 8,000 |
Lease liabilities | 42,000 |
Total | 196,000 |
Liquidity risk | 2024 |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Borrowings | 521,000 |
Interest to be accrued | 4,000 |
Trade payables and other liabilities | 7,000 |
Lease liabilities | 28,000 |
Total | 560,000 |
Liquidity risk | Thereafter |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Borrowings | 9,000 |
Interest to be accrued | 0 |
Trade payables and other liabilities | 38,000 |
Lease liabilities | 140,000 |
Total | $ 187,000 |

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