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Loans and borrowings - Summary of Maturities of Loans and borrowings (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | $ 1,163,900 | $ 1,060,765
2021 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | 127,946 |
2022 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | 116,767 |
2023 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | 96,132 |
2024 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | 158,459 |
2025 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | 375,385 |
Thereafter [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Loans and borrowings maturity | $ 289,211 |

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