TRANSACTIONS WITH AFFILIATES AND AFFILIATED ENTITIES - Narrative (Details) - USD ($) $ in Millions	6 Months Ended	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	May. 15, 2013
Nationstar [Member] | Credit Concentration Risk [Member] | Investment Interest Income - Excess MSRs [Member]
Related Party Transaction [Line Items]
Percentage of UPB of loans underlying investments		62.90%
Nationstar [Member] | Credit Concentration Risk [Member] | Investment Interest Income - Servicer Advances [Member]
Related Party Transaction [Line Items]
Percentage of UPB of loans underlying investments		35.30%
FIG LLC [Member]
Related Party Transaction [Line Items]
Management fee rate (percent)			1.50%
Incentive compensation percentage			25.00%
Interest rate for incentive compensation			10.00%
Increase in incentive compensation to affiliate	$ 3.3
Nationstar [Member]
Related Party Transaction [Line Items]
Unpaid Principal Balance		$ 82,200.0
Nationstar [Member] | Residential Mortgage [Member]
Related Party Transaction [Line Items]
Unpaid Principal Balance		510.4
Nationstar [Member] | Real Estate Owned [Member]
Related Party Transaction [Line Items]
Unpaid Balance of Real Estate Owned		23.5
Nationstar [Member] | Non-Agency RMBS [Member]
Related Party Transaction [Line Items]
Face amount of investment		1,900.0
Unpaid Principal Balance		8,400.0
Nationstar [Member] | Agency RMBS [Member]
Related Party Transaction [Line Items]
Face amount of investment		$ 27.2