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Employee benefits (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Current |  |
Profit sharing and bonuses | $ 7,770 | $ 0
Performance bonds and operational targets | 1,326 | 16,387
Total | 9,096 | 16,387
Non-current |  |
Profit sharing and bonuses | 0 | 8,026
Severance indemnity payments | 32,199 | 27,814
Total | $ 32,199 | $ 35,840

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