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Financial instruments (Details 3) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial instruments [Line Items] |  |
Assets before allowances | $ 396,099 | $ 422,236
Allowance for doubtful trade receivables | (19,728) | (21,384)
Assets for trade receivables, net | 376,371 | 400,852
Receivables related to credit operations, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 327,586 | 383,775
Allowance for doubtful trade receivables | (14,321) | (16,192)
Assets for trade receivables, net | 313,265 | 367,583
Trade receivables, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 327,586 | 383,775
Allowance for doubtful trade receivables | (14,321) | (16,192)
Assets for trade receivables, net | 313,265 | 367,583
Prepayments, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 20,684 | 21,092
Allowance for doubtful trade receivables | (784) | (783)
Assets for trade receivables, net | 19,900 | 20,309
Other receivables, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 36,664 | 15,659
Allowance for doubtful trade receivables | (4,623) | (4,409)
Assets for trade receivables, net | 32,041 | 11,250
Current trade and other receivables [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 57,348 | 36,751
Allowance for doubtful trade receivables | (5,407) | (5,192)
Assets for trade receivables, net | 51,941 | 31,559
Other receivables, non-current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 11,165 | 1,710
Allowance for doubtful trade receivables | 0 | 0
Assets for trade receivables, net | 11,165 | 1,710
Non-current receivables [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 11,165 | 1,710
Allowance for doubtful trade receivables | 0 | 0
Assets for trade receivables, net | $ 11,165 | $ 1,710

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- Definition The amount of trade receivables and other receivables. [Refer: Trade receivables; Other receivables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_h&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_b&doctype=Standard -URIDate 2020-01-01 + Details
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