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BORROWINGS (Maturity of borrowings) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | $ 1,722,893 | $ 2,188,674
Fixed Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 129,949 | 165,623
Floating Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 1,592,944 | $ 2,023,051
2021 |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 395,604 |
2021 | Fixed Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 129,949 |
2021 | Floating Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 265,655 |
2022 |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 659,942 |
2022 | Fixed Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 0 |
2022 | Floating Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 659,942 |
2023 and thereafter |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 667,347 |
2023 and thereafter | Fixed Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | 0 |
2023 and thereafter | Floating Rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings | $ 667,347 |

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