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Trust Activities - Additional Information (Detail) - ARS ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of trust activities [line items]    
Debt securities and certificates of participation in financial trusts $ 568,961 $ 2,637,016
Assets transferred by the Bank 6,641 12,462
Assets managed by the Bank 2,061,643 1,397,282
Bank Trust [member]    
Disclosure of trust activities [line items]    
Assets managed by the Bank $ 9,286,164 $ 8,609,425