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Trade and other receivables (Details 3) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Balance at the beginning of year $ (3,837,914) $ (3,936,871)
Impairment estimate for accounts receivable (1,948,264) (1,352,722)
Uncollectible accounts 634,256 219,222
Add back of unused provisions 832,704 1,031,841
Effect of translation into presentation currency 164,466 200,616
Total $ (4,154,752) $ (3,837,914)