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Fee and Commission Expense (Tables)
 12 Months Ended
Dec. 31, 2020
Fee and commission expense [abstract]  
Fee and Commission Expense
   
2020
   
2019
   
2018
 
For credit and debit cards
   8,524,712    8,266,906    7,191,092 
For promotions
   1,746,686    2,623,670    2,724,585 
For foreign trade transactions
   278,455    485,530    328,438 
Linked to transactions with securities
   4,534    4,000    3,902 
Other commission expenses
   868,847    1,461,741    1,273,686 
   
 
 
   
 
 
   
 
 
 
TOTAL
  
 
  11,423,234
 
  
 
  12,841,847
 
  
 
  11,521,703