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SUBORDINATED NOTES (Details) - USD ($)
$ in Thousands
Oct. 14, 2020
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Subordinated notes   $ 19,496 $ 19,526
Fixed 4.75% to Floating Rate Notes, Due 2030      
Debt Instrument [Line Items]      
Subordinated notes $ 20,000    
Interest rate, stated percentage 4.75%    
Fixed 4.75% to Floating Rate Notes, Due 2030 | Minimum      
Debt Instrument [Line Items]      
Debt issuance costs $ 600    
Fixed 4.75% to Floating Rate Notes, Due 2030 | Federal Home Loan Bank of New York      
Debt Instrument [Line Items]      
Basis spread on variable rate 4.58%