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Disclosures on equity (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Disclosure of Disclosures on equity [Line Items] |  |  |  |
Net Financial Debt |  | $ (217,190) | $ (421,120) | $ (471,921)
Liquidity |  | 3.29 | 4.02 |
Net Debt / Capitalization |  | 0.10 | 0.17 |
Return on equity |  | 19.1 | 12.25 |
EBITDA |  | $ 894,588 | $ 796,134 |
ROA |  | 21.4 | 16.0 |
Indebtedness |  | 0.91 | 0.83 |
Description Net Financial Debt | [1] | Financial Debt– Financial Resources |  |
Description Liquidity | [1] | Current Asset divided by Current Liability |  |
Description Net Debt / Capitalization | [1] | Net Financial Debt divided by ,tal Equity |  |
Description ROE | [1] | Income divided by ,tal Equity |  |
Description EBITDA | [1] | EBITDA |  |
Description ROA | [1] | EBITDA– Depreciation divided by Net Total Assets of financial resources less related parties’ investments |  |
Description Indebtedness | [1] | Total Liability on Equity |  |
Calculation Net Financial Debt | [1] | Other current Financial Liabilities + Other Non-Current Financial Liabilities– Cash and Cash Equivalents– Other Current Financial Assets– Hedging Assets, non-current |  |
Calculation Liquidity | [1] | Total Current Assets / Total Current Liabilities |  |
Calculation Net Debt / Capitalization | [1] | Net financial debt / ( Net financial debt + Total Equity) |  |
Calculation ROE | [1] | Total Income / Equity (UH 12 months) |  |
Calculation EBITDA | [1] | Gross Profit-Administrative Expenses + Adjustments for depreciation and amortization expenses. |  |
Calculation ROA | [1] | (Gross Income– Administrative Expenses)/ (Total Assets– Cash and Cash Equivalents– Other Current Financial Assets– Other Non-Current Financial Assets– Equity-accounted Investees) (UH 12 months) |  |
Calculation Indebtedness | [1] | Total Liabilities / Total Equity |  |
[1] | Assumes the absolute value of the accounting records

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