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REGULATORY FRAMEWORK, Expansion of the Natural Gas Transportation System (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 ARS ($) Installment | Dec. 31, 2016 ARS ($)
Expansion of the natural gas transportation system [Abstract] |  |
Other financial assets at amortized cost | $ 14,473 | $ 21,584
Debt Securities [Member] |  |
Expansion of the natural gas transportation system [Abstract] |  |
Number of equal installments | Installment | 85 |
CER interest rate | 8.00% |
Other financial assets at amortized cost | $ 21,584 |

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