FAIR VALUE - INPUTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Collateralized Debt Obligations | Discounted cash flows
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Probability of actual and forecasted defaults	16.50%
Percentage of actual defaults		15.40%
Description of variable rate basis	U.S. Treasury
Collateralized Debt Obligations | Discounted cash flows | Significant Unobservable Inputs (Level 3)
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Percent increase in discount rate	1.00%
Effect on net income before tax from one percentage point increase in discount rate	$ 808
Percent decrease in discount rate	1.00%
Effect on net income before tax from one percentage point decrease in discount rate	$ 934
Collateralized Debt Obligations | Discounted cash flows | Significant Unobservable Inputs (Level 3) | Weighted Average
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Basis spread on variable rate	5.00%
HTM Securities Non-Agency RMBS | Significant Unobservable Inputs (Level 3)
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Description of variable rate basis	LIBOR
Unemployment rate	4.70%
HTM Securities Non-Agency RMBS | Discounted cash flows | Minimum
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Basis spread on variable rate	2.45%
HTM Securities Non-Agency RMBS | Discounted cash flows | Maximum
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Basis spread on variable rate	8.20%
HTM Securities Non-Agency RMBS | Discounted cash flows | Significant Unobservable Inputs (Level 3) | Minimum
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Probability of actual and forecasted defaults	1.50%
Loss severity rates	40.00%
HTM Securities Non-Agency RMBS | Discounted cash flows | Significant Unobservable Inputs (Level 3) | Maximum
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Probability of actual and forecasted defaults	17.80%
Loss severity rates	68.80%