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Income taxes (Details 2) - CLP ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Abstract] |  |  |
Income as per deferred tax related to the origin and reversal of temporary differences | $ (500,800) | $ (878,629) | $ (454,933)
Prior year adjustments | 569,212 | 3,838,136 | 3,204,656
Effect of change in tax rates | (50,071) | (856,612) | (1,066,964)
Tax benefits (loss) | 611,282 | (765,292) | 248,559
Total deferred tax expense | 629,623 | 1,337,603 | 1,931,318
Current tax expense | (47,841,130) | (31,285,976) | (48,168,474)
Prior period adjustments | (1,154,469) | (298,010) | (3,877,360)
(Loss) Income from income tax | $ (48,365,976) | $ (30,246,383) | $ (50,114,516)

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