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Financial instruments (Details 3) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financial instruments [Line Items] |  |
Assets before allowances | $ 422,236 | $ 488,798
Allowance for doubtful trade receivables | (21,384) | (19,904)
Assets for trade receivables, net | 400,852 | 468,894
Receivables related to credit operations, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 383,775 | 445,670
Allowance for doubtful trade receivables | (16,192) | (14,756)
Assets for trade receivables, net | 367,583 | 430,914
Trade receivables, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 383,775 | 445,670
Allowance for doubtful trade receivables | (16,192) | (14,756)
Assets for trade receivables, net | 367,583 | 430,914
Prepayments, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 21,092 | 16,990
Allowance for doubtful trade receivables | (783) | (843)
Assets for trade receivables, net | 20,309 | 16,147
Other receivables, current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 15,659 | 23,863
Allowance for doubtful trade receivables | (4,409) | (4,305)
Assets for trade receivables, net | 11,250 | 19,558
Current trade and other receivables [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 36,751 | 40,853
Allowance for doubtful trade receivables | (5,192) | (5,148)
Assets for trade receivables, net | 31,559 | 35,705
Other receivables, non-current [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 1,710 | 2,275
Allowance for doubtful trade receivables | 0 | 0
Assets for trade receivables, net | 1,710 | 2,275
Non-current receivables [Member] |  |
Financial instruments [Line Items] |  |
Assets before allowances | 1,710 | 2,275
Allowance for doubtful trade receivables | 0 | 0
Assets for trade receivables, net | $ 1,710 | $ 2,275

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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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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 2019-01-01 -Paragraph 54 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_h&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_b&doctype=Standard -URIDate 2019-03-27 + Details
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