INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2013	Dec. 31, 2016	Dec. 31, 2015
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		$ 55.3
Nationstar [Member]
Mortgage Loans on Real Estate [Line Items]
Interest in reverse mortgage loans	30.00%
Reverse Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Interest in reverse mortgage loans	70.00%	70.00%
Unpaid principal balance		$ 0.5	$ 0.4
Residential Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance		$ 447.0