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Accounts and transactions with related parties (Details 3) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Directors [Member]      
Statement [Line Items]      
Audit's Committee $ 63,120 $ 47,386 $ 29,185
Directors Committee 64,837 47,154 35,179
Attendance meetings fee 1,380,976 1,266,892 952,490
Dividend Participation 2,097,276 6,038,934 2,270,840
Chief Executive [Member]      
Statement [Line Items]      
Directors Committee 16,655 13,650 16,457
Attendance meetings fee 199,798 190,080 178,913
Dividend Participation $ 27,773 $ 18,541 $ 22,144