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COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details)
1 Months Ended
Dec. 31, 2015
claim
Dec. 31, 2021
USD ($)
claim
Aug. 10, 2017
claim
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Loss contingency, new derivative actions filed | claim 2    
Loss contingency, number of pending derivative actions | claim     6
Loss contingency, number of pending derivative actions to be consolidated | claim   4  
Loan Origination Commitments      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, loan origination commitment   $ 2,483,000,000  
Loan Origination Commitments | Sales commitment      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, commitment   50,000,000  
Loan Origination Commitments | Fixed Interest Rate      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, loan origination commitment   $ 137,800,000  
Weighted average fixed interest rate on commitments to extend credit   4.38%  
Loan Origination Commitments | Fixed Interest Rate | Sales commitment      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, commitment   $ 50,000,000  
Loan Origination Commitments | Variable Interest Rate      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, loan origination commitment   2,345,200,000  
Loan Origination Commitments | Variable Interest Rate | Sales commitment      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Off-balance sheet, commitment   $ 0