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Investment Property - Additional Information (Detail) - CLP ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about investment property [Line Items]      
Investment property $ 7,421,940 $ 6,795,155 $ 7,557,356
Level 3 [Member]      
Disclosure of detailed information about investment property [Line Items]      
Investment property 8,484,901    
At fair value [member]      
Disclosure of detailed information about investment property [Line Items]      
Investment property $ 8,484,901 $ 7,880,432