FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Inputs Used in Valuing Residential Mortgage Loans (Footnote) (Details)	1 Months Ended	12 Months Ended
Feb. 28, 2013	Dec. 31, 2015
Reverse Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Interest in reverse mortgage loans	70.00%	70.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_MortgageLoansOnRealEstateLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration