EXCESS MORTGAGE SERVICING RIGHTS - Summary of Investments in Excess MSRs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Weighted Average Life (Years)	3 years 7 months 6 days
Original and Recaptured Pools
Schedule of Equity Method Investments [Line Items]
Original and Recaptured Pools	$ 10,820	$ (12,712)	$ (1,436)
Corporate Joint Venture | Servicer advance investments
Schedule of Equity Method Investments [Line Items]
UPB	13,316,828	15,499,559
Excess MSRs
Schedule of Equity Method Investments [Line Items]
UPB	$ 53,494,378	$ 42,957,347
Weighted Average Life (Years)	5 years 10 months 24 days	6 years 3 months 18 days
Amortized Cost Basis	$ 321,962	$ 181,721
Carrying Value	$ 369,162	$ 208,385
Excess MSRs | Minimum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	65.00%	32.50%
Excess MSRs | Minimum | Mr. Cooper
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	20.00%	0.00%
Excess MSRs | Minimum | Former Manager
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR		0.00%
Excess MSRs | Maximum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	80.00%	100.00%
Excess MSRs | Maximum | Mr. Cooper
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	35.00%	35.00%
Excess MSRs | Maximum | Former Manager
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR		50.00%
Excess MSRs | Weighted Average
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	69.90%	56.50%
Excess MSRs | Weighted Average | Mr. Cooper
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	30.90%