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Administrative Expenses (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2016
CLP ($)
Dec. 31, 2015
CLP ($)
Administrative Expenses        
General administrative expenses   $ 211,611 $ 209,304 $ 194,159
Outsources services   51,949 46,923 47,932
Marketing expenses   30,698 32,781 32,509
Taxes, payroll taxes and contributions   14,242 14,161 12,513
Board expenses   2,955 3,175 2,861
Total $ 506,077 $ 311,455 $ 306,344 $ 289,974