FAIR VALUE OF FINANCIAL INSTRUMENTS - Summary of Certain Information Regarding Inputs used in Valuing Excess MSRs Owned Directly and through Equity Method Investees (Details)	12 Months Ended
	Dec. 31, 2014
Held Directly (Note 4):
Prepayment Speed	12.20%	[1],[2]
Delinquency	6.30%	[2],[3]
Recapture Rate	22.60%	[2],[4]
Excess Mortgage Servicing Amount (bps)	17.47	[2],[5]
Directly Held [Member]
Held Directly (Note 4):
Prepayment Speed	11.50%	[1],[2]
Delinquency	5.50%	[2],[3]
Recapture Rate	20.00%	[2],[4]
Excess Mortgage Servicing Amount (bps)	18.23	[2],[5]
Held through Equity Method Investees [Member]
Held Directly (Note 4):
Prepayment Speed	12.50%	[1],[2]
Delinquency	6.40%	[2],[3]
Recapture Rate	24.10%	[2],[4]
Excess Mortgage Servicing Amount (bps)	17.04	[2],[5]
Agency [Member] | Directly Held [Member]
Held Directly (Note 4):
Prepayment Speed	10.70%	[1],[2]
Delinquency	5.50%	[2],[3]
Recapture Rate	30.40%	[2],[4]
Excess Mortgage Servicing Amount (bps)	21.53	[2],[5]
Agency [Member] | Directly Held [Member] | Original and Recaptured Pools [Member]
Held Directly (Note 4):
Prepayment Speed	10.90%	[1],[2]
Delinquency	5.50%	[2],[3]
Recapture Rate	31.10%	[2],[4]
Excess Mortgage Servicing Amount (bps)	21.55	[2],[5]
Agency [Member] | Directly Held [Member] | Recapture Agreements [Member]
Held Directly (Note 4):
Prepayment Speed	8.00%	[1],[2]
Delinquency	5.00%	[2],[3]
Recapture Rate	19.80%	[2],[4]
Excess Mortgage Servicing Amount (bps)	21.20	[2],[5]
Agency [Member] | Held through Equity Method Investees [Member]
Held Directly (Note 4):
Prepayment Speed	12.30%	[1],[2]
Delinquency	6.40%	[2],[3]
Recapture Rate	30.90%	[2],[4]
Excess Mortgage Servicing Amount (bps)	19.50	[2],[5]
Agency [Member] | Held through Equity Method Investees [Member] | Original and Recaptured Pools [Member]
Held Directly (Note 4):
Prepayment Speed	13.20%	[1],[2]
Delinquency	6.70%	[2],[3]
Recapture Rate	33.30%	[2],[4]
Excess Mortgage Servicing Amount (bps)	18.72	[2],[5]
Agency [Member] | Held through Equity Method Investees [Member] | Recapture Agreements [Member]
Held Directly (Note 4):
Prepayment Speed	8.00%	[1],[2]
Delinquency	5.00%	[2],[3]
Recapture Rate	20.00%	[2],[4]
Excess Mortgage Servicing Amount (bps)	22.97	[2],[5]
Non-Agency [Member] | Directly Held [Member]
Held Directly (Note 4):
Prepayment Speed	12.20%	[1],[2],[6]
Recapture Rate	10.70%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	15.26	[2],[5],[6]
Non-Agency [Member] | Directly Held [Member] | Original and Recaptured Pools [Member]
Held Directly (Note 4):
Prepayment Speed	12.50%	[1],[2],[6]
Recapture Rate	10.00%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	14.92	[2],[5],[6]
Non-Agency [Member] | Directly Held [Member] | Recapture Agreements [Member]
Held Directly (Note 4):
Prepayment Speed	8.00%	[1],[2],[6]
Recapture Rate	20.00%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	19.91	[2],[5],[6]
Non-Agency [Member] | Held through Equity Method Investees [Member]
Held Directly (Note 4):
Prepayment Speed	13.10%	[1],[2],[6]
Recapture Rate	10.70%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	12.21	[2],[5],[6]
Non-Agency [Member] | Held through Equity Method Investees [Member] | Original and Recaptured Pools [Member]
Held Directly (Note 4):
Prepayment Speed	13.40%	[1],[2],[6]
Recapture Rate	10.00%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	11.66	[2],[5],[6]
Non-Agency [Member] | Held through Equity Method Investees [Member] | Recapture Agreements [Member]
Held Directly (Note 4):
Prepayment Speed	8.00%	[1],[2],[6]
Recapture Rate	20.00%	[2],[4],[6]
Excess Mortgage Servicing Amount (bps)	20.00	[2],[5],[6]

[1] Projected annualized weighted average lifetime voluntary and involuntary prepayment rate using a prepayment vector.

[2] Weighted by amortized cost basis of the mortgage loan portfolio.

[3] Projected percentage of mortgage loans in the pool that will miss their mortgage payments.

[4] Percentage of voluntarily prepaid loans that are expected to be refinanced by Nationstar.

[5] Weighted average total mortgage servicing amount in excess of the basic fee.

[6] For certain pools, the Excess MSR will be paid on the total UPB of the mortgage portfolio (including both performing and delinquent loans until REO). For these pools, no delinquency assumption is used.