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BASIS OF PREPARATION OF CONSOLIDATED FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair value hierarchy (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
CLP ($)
BASIS OF PREPARATION OF CONSOLIDATED FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  
Transfers into out of Level 1 assets and liabilities $ 0
Transfers into out of level 2 assets and liabilities 0
Transfers into Level 3 of fair value hierarchy, assets 0
Transfers out of Level 3 of fair value hierarchy, assets 0
Transfers into Level 3 of fair value hierarchy, liabilities 0
Transfers out of Level 3 of fair value hierarchy, liabilities $ 0