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SHAREHOLDERS' EQUITY - Income reserves (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Legal Reserve    
SHAREHOLDERS' EQUITY    
Percentage of remaining balance of net income 5.00%  
Percentage of limited balance of share capital 20.00%  
Percentage of limited legal reserve plus capital reserve of share capital 30.00%  
Reserve balance R$ 235,019  
Legal Reserve | Maximum    
SHAREHOLDERS' EQUITY    
Percentage of limited balance of share capital 20.00%  
Reserve for capital increase    
SHAREHOLDERS' EQUITY    
Percentage of limited balance of share capital 80.00%  
Reserve balance R$ 2,513,663 R$ 0
Reserve for capital increase | Maximum    
SHAREHOLDERS' EQUITY    
Percentage of remaining balance of net income 90.00%  
Percentage of limited balance of share capital 80.00%  
Special statutory reserve    
SHAREHOLDERS' EQUITY    
Reserve balance R$ 279,295 0
Special statutory reserve | Maximum    
SHAREHOLDERS' EQUITY    
Percentage of remaining balance of net income 10.00%  
Percentage of limited balance of share capital 20.00%  
Tax incentives    
SHAREHOLDERS' EQUITY    
Reserve balance R$ 812,909 R$ 0
Capital reserves    
SHAREHOLDERS' EQUITY    
Reserve balance R$ 0