INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Mortgage Loans on Real Estate [Line Items]
Threshold period past due (in days)	60 days
Government Guaranteed Mortgage Loans upon Foreclosure Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Claims receivable	$ 63.2
Reverse Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Interest in reverse mortgage loans	70.00%
Unpaid principal balance	$ 0.4
Residential Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 368.2