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Financial instruments (Details 25) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | $ 194,422 | $ 145,275
Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 187,103 | 141,323
31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 4,969 | 2,394
61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 128 | 1,089
91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 116 | 132
121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 2,106 | 337
366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 0
Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 133,495 | 52,105
Goods [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 126,577 | 48,969
Goods [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 4,655 | 1,919
Goods [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 128 | 912
Goods [Member] | 91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 116 | 25
Goods [Member] | 121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 2,019 | 280
Goods [Member] | 366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 0
Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 52,040 | 38,008
Services [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 51,785 | 37,376
Services [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 168 | 314
Services [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 157
Services [Member] | 91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 107
Services [Member] | 121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 87 | 54
Services [Member] | 366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 0
Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 8,887 | 55,162
Others [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 8,741 | 54,978
Others [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 146 | 161
Others [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 20
Others [Member] | 91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 0
Others [Member] | 121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period |  | 3
Others [Member] | 366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | $ 0 | $ 0

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