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ADVANCES FROM THE FEDERAL HOME LOAN BANK (FHLB) - Summary of Advances from FHLB (Parenthetical) (Detail)
Sep. 30, 2020
Dec. 31, 2019
short term debt [member]    
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]    
Weighted average interest rate 2.24% 1.83%
long term debt [member]    
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]    
Weighted average interest rate   2.21%
Interest rate type Fixed Fixed