MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Schedule of Investment in MSRs and MSR Financing Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Mortgage Servicing Rights [Line Items]
Weighted Average Life (Years)	3 years 7 months 6 days
Carrying Value	$ 10,321,671	$ 8,405,938	$ 8,889,403
Residential mortgage loans subject to repurchase	2,745,756	1,782,998	$ 1,219,890
Mortgage Servicing Rights and Mortgage Servicing Rights Financing Receivable
Schedule of Mortgage Servicing Rights [Line Items]
UPB of Underlying Mortgages	$ 590,214,351	$ 528,434,509
Weighted Average Life (Years)	6 years 4 months 24 days	7 years 6 months
Carrying Value	$ 10,321,671	$ 8,405,938
MSRs | Weighted Average
Schedule of Mortgage Servicing Rights [Line Items]
Discount rate	8.90%	8.50%
MSRs | Minimum
Schedule of Mortgage Servicing Rights [Line Items]
Discount rate	8.70%	7.90%
MSRs | Maximum
Schedule of Mortgage Servicing Rights [Line Items]
Discount rate	10.30%	10.80%
GSE | MSRs
Schedule of Mortgage Servicing Rights [Line Items]
UPB of Underlying Mortgages	$ 383,014,320	$ 351,642,337
Weighted Average Life (Years)	6 years 6 months	7 years 8 months 12 days
Carrying Value	$ 6,413,199	$ 5,333,013
non-Agency | MSRs
Schedule of Mortgage Servicing Rights [Line Items]
UPB of Underlying Mortgages	$ 70,022,636	$ 48,928,545
Weighted Average Life (Years)	5 years 4 months 24 days	6 years 9 months 18 days
Carrying Value	$ 836,408	$ 678,913
Ginnie Mae | MSRs
Schedule of Mortgage Servicing Rights [Line Items]
UPB of Underlying Mortgages	$ 137,177,395	$ 127,863,627
Weighted Average Life (Years)	6 years 4 months 24 days	7 years 1 month 6 days
Carrying Value	$ 3,072,064	$ 2,394,012