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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