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Other Operating Expenses (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CLP ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2016
CLP ($)
May 24, 2018
CLP ($)
Other Operating Expenses          
Total $ 42,656 $ 29,586 $ 25,868 $ 26,936  
Write-offs for operating risks   11,378 6,360 5,475  
Operations expenses leasing   4,501 10,152 1,893  
Card administration   2,640 2,890 3,921  
Provisions for contingencies   3   6,880  
Other   $ (11,064) $ (6,466) $ (8,767)  
Net write-off recognized for external fraud committed against the Bank         $ 6,002