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Employee Benefits (Details 4) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Employee benefits [Abstract]      
Current cost of service $ 1,942,099 $ 1,650,484 $ 1,023,969
Past service cost 604,337 342,039 131,204
Accrued paid benefit 6,023,869 7,851,201 4,377,570
Other 269,377 1,114,112 646,502
Total expense recognized in Consolidated Statement of Income $ 8,839,682 $ 10,957,836 $ 6,179,245