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INVESTMENTS - Summary of Proportionate Share of Vasconia's Net Income translated from MXN to USD (Details) - Grupo Vasconia S.A.B. - $ / $ | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |
Average daily exchange rate for period (MXN per USD) | 19.42 | 18.94 |  |
Minimum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Average daily exchange rate for period (MXN per USD) |  |  | 19.11 | 18.71
Maximum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Average daily exchange rate for period (MXN per USD) |  |  | 19.42 | 19.38

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