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INVESTMENTS - Summarized Exchange Rate Translation from MXN to USD (Details) - Grupo Vasconia S.A.B. - $ / $
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]        
Average daily exchange rate for period (MXN per USD) 23.31 19.11    
Minimum        
Schedule of Equity Method Investments [Line Items]        
Average daily exchange rate for period (MXN per USD)     19.91 19.11
Maximum        
Schedule of Equity Method Investments [Line Items]        
Average daily exchange rate for period (MXN per USD)     23.31 19.24