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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]        
Beginning Balance     $ 1,644,504  
Ending Balance $ 1,941,139   1,941,139  
MSRs        
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]        
Purchases, net     400,909  
Amortization of servicing rights (105,321) $ (65,439) (177,996) $ (120,566)
Mortgage Servicing Rights Financing Receivable | MSRs        
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]        
Ending Balance 1,941,139   1,941,139  
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, net     397,538  
Proceeds from sales     (9,113)  
Amortization of servicing rights (40,201) (56,840) (83,077) (105,543)
Change in valuation inputs and assumptions (14,850) (62,263) (7,912) 257,516
(Gain)/loss on sales (360) $ 0 (801) $ 0
Ending Balance $ 1,941,139   $ 1,941,139