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Financial instruments (Details 10) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial instruments [Line Items] |  |
Current | $ 68,955 | $ 291,128
Non-current | 1,899,513 | 1,488,723
Total | 1,968,468 | 1,779,851
Bank borrowings [Member] | Financial liabilities at amortised cost, category [member] |  |
Financial instruments [Line Items] |  |
Current | 82 | 199
Non-current | 69,376 | 69,138
Total | 69,458 | 69,337
Obligations With The Public [Member] |  |
Financial instruments [Line Items] |  |
Current | 36,781 | 280,578
Non-current | 1,816,626 | 1,403,108
Total | 1,853,407 | 1,683,686
For hedging [Member] | Financial assets at fair value through profit or loss, classified as held for trading, category [member] |  |
Financial instruments [Line Items] |  |
Current | 26,699 | 7,183
Non-current | 13,511 | 16,477
Total | 40,210 | 23,660
Non-hedging liabilities [Member] | Financial assets at fair value through profit or loss, classified as held for trading, category [member] |  |
Financial instruments [Line Items] |  |
Current | 5,393 | 3,168
Total | $ 5,393 | $ 3,168

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