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ALLOWANCE FOR LOAN LOSSES - Average recorded investment in impaired loans (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Recorded Investment with No Specific Valuation Allowance $ 534  
Recorded Investment with Specific Valuation Allowance 95  
Total Recorded Investment 629  
Unpaid Principal Balance 731  
Related Specific Valuation Allowance 6  
Recorded Investment with No Specific Valuation Allowance   $ 481
Recorded Investment with Specific Valuation Allowance   236
Total Recorded Investment   717
Unpaid Principal Balance   924
Related Specific Valuation Allowance   8
Commercial Real Estate Portfolio Segment | Commercial Business    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Recorded Investment with No Specific Valuation Allowance 79  
Total Recorded Investment 79  
Unpaid Principal Balance 127  
Recorded Investment with No Specific Valuation Allowance   100
Total Recorded Investment   100
Unpaid Principal Balance   143
Commercial Real Estate Portfolio Segment | Commercial Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Recorded Investment with No Specific Valuation Allowance 100  
Total Recorded Investment 100  
Unpaid Principal Balance 162  
Recorded Investment with No Specific Valuation Allowance   122
Total Recorded Investment   122
Unpaid Principal Balance   178
Consumer    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Recorded Investment with No Specific Valuation Allowance 355  
Recorded Investment with Specific Valuation Allowance 95  
Total Recorded Investment 450  
Unpaid Principal Balance 442  
Related Specific Valuation Allowance $ 6  
Recorded Investment with No Specific Valuation Allowance   259
Recorded Investment with Specific Valuation Allowance   236
Total Recorded Investment   495
Unpaid Principal Balance   603
Related Specific Valuation Allowance   $ 8