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Depreciation, Amortization and Impairment (Details) $ in Thousands, $ in Millions | 12 Months Ended
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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

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