Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
MSR UPB	$ 205,591,547	$ 154,235,693
Servicing Asset at Fair Value, Amount	2,250,147	1,294,817	$ 1,486,395	$ 1,457,149
UPB of loans transferred	31,864,769	18,062,856
NRZ
Servicing Assets at Fair Value [Line Items]
MSR UPB	12,100,000
UPB of loans transferred	41,500,000
MAV
Servicing Assets at Fair Value [Line Items]
UPB of loans transferred	24,900,000
Owned Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	127,919,800	90,174,495
Servicing Asset at Fair Value, Amount	1,422,546	727,865
NRZ Transferred Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	53,652,843	64,061,198
NRZ Transferred Mortgage Servicing Rights \| NRZ
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Amount	558,940	566,952
MAV Transferred Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	24,018,904	0
Servicing Asset at Fair Value, Amount	$ 268,661	$ 0