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Provisions (Details)
$ in Thousands, $ in Millions
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2016
CLP ($)
Dec. 31, 2015
CLP ($)
Dec. 31, 2014
CLP ($)
Provisions          
Provisions $ 316,099 $ 194,537 $ 187,568 $ 182,832 $ 185,643
Minimum dividends          
Provisions          
Provisions   172,804 165,675 167,699 177,324
Contingencies          
Provisions          
Provisions   $ 21,733 $ 21,893 $ 15,133 $ 8,319