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LOANS PAYABLE - Additional Information (Detail) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Short Term Debt [Line Items]    
Loans Pledged as Collateral $ 2,500,000,000 $ 1,800,000,000
FederalReserveBankAdvancesMember    
Short Term Debt [Line Items]    
ShortTermBorrowings 0  
Loans Pledged as Collateral 1,600,000,000  
FED Discount Window funds availability $ 960,000,000