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Basis of presentation for the consolidated financial statements (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Expenses |  |  |
Other expenses by function |  | $ 8,038 | $ 7,198
Net gains on reversal (losses) on impairment of financial assets | $ (2,967) | 8,038 | 7,198
Sub total | $ (1,638,557) | (1,549,593) | (1,499,254)
Originally reported [Member] |  |  |
Expenses |  |  |
Other expenses by function |  | (61,638) | (89,731)
Net gains on reversal (losses) on impairment of financial assets |  | 0 | 0
Sub total |  | (61,638) | (89,731)
Reclassification balances [Member] |  |  |
Expenses |  |  |
Other expenses by function |  | (53,600) | (82,533)
Net gains on reversal (losses) on impairment of financial assets |  | (8,038) | (7,198)
Sub total |  | $ (61,638) | $ (89,731)

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- Definition The amount of expenses aggregated according to their nature (for example, depreciation, purchases of materials, transport costs, employee benefits and advertising costs), and not reallocated among functions within the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_99&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_ba&doctype=Standard -URIDate 2018-03-16 + Details
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