SECURITIES - UNREALIZED GAIN (LOSS) ON INVESTMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Available-for-sale debt securities—net unrealized gains (losses)	$ 4,198	$ (432)
Available-for-sale debt securities—non-credit related losses	(845)	(845)
Subtotal	3,353	(1,277)
Tax benefit (expense)	(1,060)	340
Net unrealized gain (loss) on investment securities in accumulated other comprehensive income (loss)	$ 2,293	$ (937)

Accumulated Other Comprehensive Income (Loss), Investment Securities, Before Tax

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Accumulated Other Comprehensive Income (Loss), Investment Securities, Net of Tax

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Accumulated Other Comprehensive Income (Loss), Investment Securities, Tax Expense (Benefit)

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Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Available-for-sale, Debt Securities, Net Unrealized Gains

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Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Before Tax, Available-for-Sale, Debt Securities

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