Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MORTGAGE SERVICING RIGHTS FINANCING RECEIVABLES - Schedule of Activity Related to the Carrying Value of Investments in MSRs (Details)

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INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MORTGAGE SERVICING RIGHTS FINANCING RECEIVABLES - Schedule of Activity Related to the Carrying Value of Investments in MSRs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]    
Beginning Balance $ 1,644,504  
Ending Balance 1,717,872  
MSRs    
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]    
Purchases 155,747  
Amortization of servicing rights (72,675) $ (55,127)
Mortgage Servicing Rights Financing Receivable | MSRs    
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]    
Ending Balance 1,717,872  
Mortgage Servicing Rights Financing Receivable | New Residential Mortgage LLC | MSRs    
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]    
Beginning Balance 1,644,504  
Purchases 116,660  
Proceeds from sales (6,913)  
Amortization of servicing rights (42,876) (48,703)
Change in valuation inputs and assumptions 6,938 319,779
(Gain)/loss on sales (441) $ 0
Ending Balance $ 1,717,872