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COMMITMENTS AND CONTINGENT LIABILITIES - Additional information (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 31, 2020
Jun. 30, 2019
COMMITMENTS AND CONTINGENT LIABILITIES    
Adjustable rate mortgages annual rate increase 2.00%  
Adjustable rate residential mortgage loans amount $ 46.4  
Adjustable rate mortgage loans had conversion options 3.6  
Loans held for sale 0.0 $ 0.0
Loan commitments with borrowers with rate lock agreements which are intended to be held for sale 0.0 0.0
Amount of commitments to sell loans to unrelated investors $ 0.0 $ 0.0
Minimum    
COMMITMENTS AND CONTINGENT LIABILITIES    
Adjustable rate mortgages lifetime rate increase 5.00%  
Maximum    
COMMITMENTS AND CONTINGENT LIABILITIES    
Adjustable rate mortgages lifetime rate increase 6.00%