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SECURITIES - NARRATIVE (Details)
$ in Thousands
 12 Months Ended
Jun. 30, 2022
USD ($)
security
Jun. 30, 2021
USD ($)
security
Marketable Securities [Line Items]    
Available-for-sale | $ $ 262,518 $ 187,335
Number of securities in a continuous loss position for a period of more than 12 months 14 7
Number of securities in a continuous loss position for a period of less than 12 months 25 7
Number of trading securities sold 0 0
Number of available-for-sale securities sold 0 0
Investment resolution, no realized gain or loss | $   $ 70,800
Asset Pledged as Collateral    
Marketable Securities [Line Items]    
Debt securities available-for-sale and held-to-maturity pledged to secure borrowings | $ $ 1,200 1,400
Securities – Non-agency MBS    
Marketable Securities [Line Items]    
Available-for-sale | $ $ 186,814 $ 67,615
RMBS, Super Senior Securities    
Marketable Securities [Line Items]    
Available-for-sale, number of securities 17