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BASIS OF PREPARATION OF CONSOLIDATED FINANCIAL STATEMENTS AND APPLICATION OF ACCOUNTING CRITERIA - Functional currency and presentation currency (Details)
$ in Thousands
 12 Months Ended
Jan. 01, 2018
CLP ($)
Dec. 31, 2019
$ / $
Dec. 31, 2018
$ / $
Dec. 31, 2019
$ /
Dec. 31, 2019
$ / R$
Dec. 31, 2019
$ / $
Dec. 31, 2018
$ /
Dec. 31, 2018
$ / R$
Dec. 31, 2018
$ / $
Dec. 31, 2017
$ / $
Dec. 31, 2017
$ /
Dec. 31, 2017
$ / R$
Dec. 31, 2017
$ / $
BASIS OF PREPARATION OF CONSOLIDATED FINANCIAL STATEMENTS AND APPLICATION OF ACCOUNTING CRITERIA                          
Minimum accumulated inflation rate for three year stands out   100.00%                      
Inflation rate (as a percent)   54.85% 47.60%                    
Adjustment in accumulated results upon adoption of IAS 29 $ 79,499,736                        
Exchange rates and value of the UF at the close   748.74 694.77 0.116 185.76 12.50 0.117 179.30 18.43 614.75 0.110 185.84 32.96