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OTHER EXPENSES (Details) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
OTHER EXPENSES      
Contingencies and Non-operating fees $ 10,192,495 $ 5,377,190 $ 9,959,181
Tax on bank debits 4,653,929 7,669,234 7,006,261
Disposal and write-off of Property, plant and equipment 262,366 3,025,497 4,800,278
Others 948,973 629,550 999,447
Total other expenses $ 16,057,763 $ 16,701,471 $ 22,765,167