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Accounts and transactions with related parties (Details 3) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Directors [Member]      
Statement [Line Items]      
Audit's Committee $ 47,386 $ 29,185 $ 23,222
Directors Committee 47,154 35,179 23,470
Attendance meetings fee 1,266,892 952,490 962,074
Dividend Participation 6,038,934 2,270,840 2,137,753
Chief Executive [Member]      
Statement [Line Items]      
Directors Committee 13,650 16,457 14,195
Attendance meetings fee 190,080 178,913 177,927
Dividend Participation $ 18,541 $ 22,144 $ 32,692