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Leases - Future minimum payments (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating lease liabilities under Topic 842 |  |
Operating leases - 2021 | $ 34,322 |
Operating leases - 2022 | 25,062 |
Operating leases - 2023 | 22,900 |
Operating leases - 2024 | 21,778 |
Operating leases - 2025 | 18,870 |
Operating leases - later years | 51,807 |
Operating leases - Total | 174,739 |
Less: Imputed interest | (22,151) |
Operating lease liabilities | 152,588 | $ 165,139
Finance lease liabilities under Topic 842 |  |
Finance leases - 2021 | 3,897 |
Finance leases - 2022 | 3,402 |
Finance leases - 2023 | 3,492 |
Finance leases - 2024 | 3,589 |
Finance leases - 2025 | 3,701 |
Finance leases - later years | 8,850 |
Finance leases - Total | 26,931 |
Less: imputed interest | (4,359) |
Finance lease liabilities | $ 22,572 | $ 19,810

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