Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS - Summary of Excess MSRs Made Through Equity Method Investees (Details)

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INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS - Summary of Excess MSRs Made Through Equity Method Investees (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Weighted Average Life (Years) 1 year 3 months 21 days  
Excess MSRs Investees    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Unpaid Principal Balance $ 47,430,395  
New Residential Interest in Investees 50.00% 50.00%
Amortized Cost Basis $ 218,708  
Carrying Value $ 297,022  
Weighted Average Life (Years) 6 years 3 months 14 days  
Excess MSRs Investees | Agency    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
New Residential Interest in Investees 50.00%  
Excess MSRs Investees | Agency | Original and Recaptured Pools    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Unpaid Principal Balance $ 47,430,395  
Investee Interest in Excess MSR 66.70%  
New Residential Interest in Investees 50.00%  
Amortized Cost Basis $ 197,193  
Carrying Value $ 253,967  
Weighted Average Life (Years) 5 years 7 months  
Excess MSRs Investees | Agency | Recapture Agreements    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Unpaid Principal Balance $ 0  
Investee Interest in Excess MSR 66.70%  
New Residential Interest in Investees 50.00%  
Amortized Cost Basis $ 21,515  
Carrying Value $ 43,055  
Weighted Average Life (Years) 12 years 8 months 30 days