INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS, EQUITY METHOD INVESTEES - Summary of the Financial Results of Excess MSR Joint Ventures, Accounted for as Equity Method Investees - Roll Forward (Footnote) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Change in fair value, prior period adjustment	$ 38,643	$ 41,615	$ 53,332
Excess MSRs Investees [Member] | Prior Period Adjustment [Member]
Schedule of Equity Method Investments [Line Items]
Change in fair value, prior period adjustment	$ 2,700