SECURITIES - UNREALIZED GAIN (LOSS) ON INVESTMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale debt securities—net unrealized gains	$ 1,616	$ 3,877
Available-for-sale debt securities—non-credit related losses	(259)	(271)
Held-to-maturity debt securities—non-credit related losses	(15,100)	(18,597)
Subtotal	(13,743)	(14,991)
Tax benefit	4,700	5,592
Net unrealized loss on investment securities in accumulated other comprehensive loss	$ (9,043)	$ (9,399)