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CURRENT AND NON-CURRENT EMPLOYEE BENEFITS - Personnel expenses (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
CLP ($)
employee
Dec. 31, 2016
CLP ($)
employee
Dec. 31, 2015
CLP ($)
employee
Personnel expenses      
Wages and salaries $ 215,715,214 $ 218,944,639 $ 230,854,998
Employee benefits 50,127,117 50,174,153 48,977,105
Severance and post-employment benefits 7,410,936 8,252,502 6,217,204
Other personnel expenses 14,205,259 10,921,843 10,561,935
Total $ 287,458,526 $ 288,293,137 $ 296,611,242
Number of Employees (unaudited)      
Number of employees | employee 15,924 16,296 16,525
Number of average employees | employee 15,784 16,009 15,504