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Disclosures on equity (Details 1) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 05, 2018 | Dec. 31, 2016
Disclosure of Disclosures on equity [Line Items] |  |  |  |
Number of current shares | 7,138,685 |  |  |
Number of shares owned by the entity or its subsidiaries or associates |  |  | 62,556,568 |
Capital amount in shares | $ 477,386 | $ 477,386 |  |
Amount of reserves | $ (14,999) | $ (14,349) |  | $ (12,888)
Series A preferred shares [Member] |  |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |  |
Number of authorized shares | 142,819,552 | 142,819,552 |  |
Number of fully subscribed and paid shares | 142,819,552 | 142,819,552 |  |
Number of subscribed, partially paid shares | 0 | 0 |  |
Par value of shares in ThUS$ | $ 943.5 | $ 943.5 |  |
Increase (decrease) in the number of current shares | 0 | 0 |  |
Number of current shares | 142,819,552 | 142,819,552 |  |
Number of shares owned by the entity or its subsidiaries or associates | 0 | 0 |  |
Number of shares whose issuance is reserved due to the existence of options or agreements to dispose shares | 0 | 0 |  |
Capital amount in shares | $ 134,750 | $ 134,750 |  |
Amount of premium issuance | 0 | 0 |  |
Amount of reserves | $ 0 | $ 0 |  |
Total number of subscribed shares, total | 142,819,552 | 142,819,552 |  |
Series B preferred shares [Member] |  |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |  |
Number of authorized shares | 120,376,972 | 120,376,972 |  |
Number of fully subscribed and paid shares | 120,376,972 | 120,376,972 |  |
Number of subscribed, partially paid shares | 0 | 0 |  |
Par value of shares in ThUS$ | $ 2,846.4 | $ 2,846.4 |  |
Increase (decrease) in the number of current shares | 0 | 0 |  |
Number of current shares | 120,376,972 | 120,376,972 |  |
Number of shares owned by the entity or its subsidiaries or associates | 0 | 0 |  |
Number of shares whose issuance is reserved due to the existence of options or agreements to dispose shares | 0 | 0 |  |
Capital amount in shares | $ 342,636 | $ 342,636 |  |
Amount of premium issuance | 0 | 0 |  |
Amount of reserves | $ 0 | $ 0 |  |
Total number of subscribed shares, total | 120,376,972 | 120,376,972 |  |

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- Definition The increase (decrease) in the number of shares outstanding. [Refer: Number of shares outstanding] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_iv&doctype=Standard -URIDate 2018-03-16 + Details
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