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Depreciation, Amortization and Impairment (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CLP ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2016
CLP ($)
Depreciation and amortization        
Depreciation of property and equipment (Note No.16a and Note No. 17)   $ 27,185 $ 26,176 $ 24,694
Amortization of intangibles assets (Note No.15a)   10,496 11,360 10,881
Total $ 54,326 37,681 37,536 35,575
Impairment loss        
(Gain) loss on debt instruments at fair value through OCI   (1,552)    
Impairment loss on property and equipment (Note No.16a)   334 166 274
Total   $ (1,218) $ 166 $ 274