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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Cash $ 2,270 $ 1,494
Asset Pledged as Collateral [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Cash $ 200,000 $ 0