INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Schedule of Residential Mortgage Loans Outstanding by Loan Type, Excluding REO (Footnote) (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Feb. 28, 2013	Jun. 30, 2015
Mortgage Loans on Real Estate [Line Items]
Threshold period past due		60 days
Net unamortized discounts and premiums		$ 1.6
Reverse Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Interest in reverse mortgage loans	70.00%	70.00%
Total unpaid principal balance		$ 0.3
Percentage of loans that have reached a termination event		74.00%
Upper Range [Member] | Performing Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Threshold period past due		30 days
GNMA EBO [Member] | Non-Performing Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Unpaid Principal Balance		$ 293.2