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LEGAL CLAIMS AND OTHER MATTERS (Details) - ARS ($)
$ in Thousands
 12 Months Ended 24 Months Ended
Oct. 09, 2008
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2011
Mar. 31, 2017
May 24, 2013
LEGAL CLAIMS AND OTHER MATTERS [Abstract]            
Provision amount on turnover tax   $ 764,300 $ 701,300      
Validity period of precautionary measure   6 months        
Extended Validity Period of Precautionary Measure   6 months        
Remaining term of validity period of precautionary measure   2 months 9 days        
Increase in tariff percentage 20.00%          
Receivables from income taxes and value added tax           $ 102,500
Account receivables booked, recovery action   $ 0 0      
Claim amount for the omission as agent of withholding and collection of turnover tax       $ 4,900    
Canceled partial debt claim amount         $ 2,900  
Provision amount on turnover tax withholding   0 0      
Provision amount on environmental matters   22,000        
Provision for other matters   $ 74,400 $ 100,800