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LOANS RECEIVABLE - Additional information (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Net deferred loan fees $ 4.1 $ 4.0
Discount on Loans receivable 1.1 1.5
Premiums On Loans Receivable $ 1.5 $ 1.8
Percentage of loans and extensions of credit outstanding 15.00%  
Loans pledged as collateral $ 525.6  
Raw Land Loans [Member] | Commercial Real Estate Portfolio Segment    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum loan-to-value ratio 65.00%  
Commercial Real Estate | Commercial Real Estate Portfolio Segment | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum loan-to-value ratio 65.00%  
Commercial Real Estate | Commercial Real Estate Portfolio Segment | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum loan-to-value ratio 80.00%  
Real estate one-to-four family | Consumer    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum loan-to-value ratio 80.00%  
Real estate one-to-four family | Consumer | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Terms of maturity 15 years  
Real estate one-to-four family | Consumer | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Terms of maturity 30 years  
Land and Land Improvements [Member] | Commercial Real Estate Portfolio Segment    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum loan-to-value ratio 75.00%