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Equity - Net financial debt (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of classes of share capital [line items] |  |  |  |
Consolidated equity | $ 884,372 | $ 937,758 | $ 892,042 | $ 1,294,973
Gross financial debt | 645,389 | 571,337 | 514,587 |
Cash and cash equivalents | (216,647) | (184,472) | (196,931) |
Net financial debt | $ 428,742 | $ 386,865 | 317,656 |
Net financial debt, including discontinued operations |  |  | $ 404,564 |
Net financial debt/Consolidated equity | 48.48% | 41.25% | 35.61% |
Net financial debt/Consolidated equity, including discontinued operations |  |  | 45.4 |
Spanish energy business classified as held for sale |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Gross financial debt |  |  | $ 86,959 |
Cash and cash equivalents |  | $ (51) |  |

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