TRANSACTIONS WITH AFFILIATES AND AFFILIATED ENTITIES - Narrative (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	May 15, 2013
Related Party Transaction [Line Items]
Management agreement, renewal term (in years)			1 year
Majority vote, percent			66.67%
Decrease in incentive compensation		$ 5.5
Payments or accruals for MSR Fund Payments			$ 0.5	$ 4.4
Amount transferred to funds			$ 0.1
Nationstar [Member] | UPB - Excess MSRs [Member] | Customer Concentration Risk [Member]
Related Party Transaction [Line Items]
Percentage of UPB of loans underlying investments			63.60%
Nationstar [Member] | UPB - Servicer Advances [Member] | Customer Concentration Risk [Member]
Related Party Transaction [Line Items]
Percentage of UPB of loans underlying investments			33.60%
FIG LLC [Member]
Related Party Transaction [Line Items]
Management fee rate					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 fee			0.75%
Nationstar [Member] | Residential Mortgage Loans [Member]
Related Party Transaction [Line Items]
Unpaid Principal Balance			$ 591.1
Nationstar [Member] | Real Estate Owned [Member]
Related Party Transaction [Line Items]
Unpaid balance of real estate owned			20.8
Nationstar [Member] | Non-Agency RMBS [Member]
Related Party Transaction [Line Items]
Face amount			4,300.0
Unpaid Principal Balance			14,800.0
Nationstar [Member] | Agency RMBS [Member]
Related Party Transaction [Line Items]
Face amount			$ 32.6