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Rights to MSRs - UPB of Loans Serviced on behalf of NRZ (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Servicing Assets at Fair Value [Line Items]  
UPB of loans serviced on behalf of NRZ $ 67,100,000
NRZ  
Servicing Assets at Fair Value [Line Items]  
UPB of loans serviced on behalf of NRZ 67,111,388
Outstanding servicing advances 575,900
NRZ | Mortgage Servicing Rights Title Retained  
Servicing Assets at Fair Value [Line Items]  
UPB of loans serviced on behalf of NRZ 14,114,602
NRZ | Mortgage Servicing Rights Title Transferred  
Servicing Assets at Fair Value [Line Items]  
UPB of loans serviced on behalf of NRZ 49,866,082
NRZ | Subservicing Assets  
Servicing Assets at Fair Value [Line Items]  
UPB of loans serviced on behalf of NRZ $ 3,130,704