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Financial instruments (Details 25) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | $ 195,214 | $ 194,422
Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 186,835 | 187,103
31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 3,334 | 4,969
61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 139 | 128
91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 788 | 116
121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 91 | 2,106
366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 4,027 | 0
Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 117,456 | 133,495
Goods [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 111,323 | 126,577
Goods [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 1,947 | 4,655
Goods [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 123 | 128
Goods [Member] | 91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 31 | 116
Goods [Member] | 121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 5 | 2,019
Goods [Member] | 366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 4,027 | 0
Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 48,426 | 52,040
Services [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 46,187 | 51,785
Services [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 1,380 | 168
Services [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 16 | 0
Services [Member] | 91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 757 | 0
Services [Member] | 121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 86 | 87
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 | 29,332 | 8,887
Others [Member] | Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 29,325 | 8,741
Others [Member] | 31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 7 | 146
Others [Member] | 61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Current Period | 0 | 0
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 | 0 |
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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