INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS, EQUITY METHOD INVESTEES - Narrative (Details) - Excess MSRs Investees [Member] - Investment	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
MSRs [Member]
Schedule of Equity Method Investments [Line Items]
Number of investments	2
Weighted average discount rate, used to value investments in excess MSRs		9.80%	9.60%
EMSRs [Member]
Schedule of Equity Method Investments [Line Items]
Weighted average discount rate, used to value investments in excess MSRs		9.60%	9.60%