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19. LEASING TRANSACTIONS (Details)
 12 Months Ended
Dec. 31, 2020
Up to two years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 7.96%
Monthly rate 0.64%
Three to five years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 10.64%
Monthly rate 0.85%
Six to twenty years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 13.17%
Monthly rate 1.04%
Up to three years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 6.87%
Monthly rate 0.56%
Three to four years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 7.33%
Monthly rate 0.59%
Four to twenty years [member]  
LeasingTransactionsLineItems [Line Items]  
Annual rate 8.08%
Monthly rate 0.65%