MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Schedule of MSRs and MSR Financing Receivables by Type (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Servicing Asset at Amortized Cost [Line Items]
Weighted Average Life (Years)	4 years
Carrying value	$ 9,693,331	$ 8,405,938
Residential mortgage loans subject to repurchase	1,905,625	$ 1,782,998	$ 1,296,097
Mortgage Servicing Rights and Mortgage Servicing Rights Financing Receivable
Servicing Asset at Amortized Cost [Line Items]
UPB of Underlying Residential Mortgage Loans	$ 587,043,388
Weighted Average Life (Years)	6 years 4 months 24 days
Carrying value	$ 9,693,331
MSRs | Weighted Average
Servicing Asset at Amortized Cost [Line Items]
Discount rate	8.90%
MSRs | Minimum
Servicing Asset at Amortized Cost [Line Items]
Discount rate	8.70%
MSRs | Maximum
Servicing Asset at Amortized Cost [Line Items]
Discount rate	10.30%
Agency | MSRs
Servicing Asset at Amortized Cost [Line Items]
UPB of Underlying Residential Mortgage Loans	$ 381,516,738
Weighted Average Life (Years)	6 years 7 months 6 days
Carrying value	$ 6,079,335
Non-Agency | MSRs
Servicing Asset at Amortized Cost [Line Items]
UPB of Underlying Residential Mortgage Loans	$ 72,106,898
Weighted Average Life (Years)	5 years 4 months 24 days
Carrying value	$ 885,053
Ginnie Mae | MSRs
Servicing Asset at Amortized Cost [Line Items]
UPB of Underlying Residential Mortgage Loans	$ 133,419,752
Weighted Average Life (Years)	6 years 3 months 18 days
Carrying value	$ 2,728,943