SECURITIES - UNREALIZED GAIN (LOSS) ON INVESTMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Available-for-sale debt securities—net unrealized gains (losses)	$ (400)	$ (692)
Available-for-sale debt securities—non-credit related losses	0	0
Held-to-maturity debt securities—non-credit related losses	0	0
Subtotal	(400)	(692)
Tax (expense) benefit	(7)	79
Net unrealized gain (loss) on investment securities in accumulated other comprehensive income (loss)	$ (407)	$ (613)

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, Held-to-maturity, Debt Securities

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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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