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BORROWINGS (Advances from the FHLB) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Federal Home Loan Bank, Advances [Line Items]    
Federal Home Loan Bank of New York advances $ 0 $ 144,000
Maturing in 2020, fixed rate at rates from 1.86% to 2.09%, weighted averaging 2.02%    
Federal Home Loan Bank, Advances [Line Items]    
Federal Home Loan Bank of New York advances   $ 144,000