EXCESS MORTGAGE SERVICING RIGHTS - Schedule of Investments in Excess MSRs and Changes in Fair Value of Excess MSR Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Weighted Average Life (Years)			4 years
MSRs Pool 1
Schedule of Equity Method Investments [Line Items]
Original and Recaptured Pools	$ 21,352	$ (599)	$ 19,430	$ (10,417)
Excess MSRs
Schedule of Equity Method Investments [Line Items]
Weighted Average Life (Years)			6 years
Amortized Cost Basis	339,048		$ 339,048
Carrying value	$ 395,606		$ 395,606		$ 208,385
Excess MSRs | Minimum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	65.00%		65.00%
Excess MSRs | Maximum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	80.00%		80.00%
Excess MSRs | Weighted Average
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	69.90%		69.90%
Excess MSRs | Mr. Cooper | Minimum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	20.00%		20.00%
Excess MSRs | Mr. Cooper | Maximum
Schedule of Equity Method Investments [Line Items]
Interest in Excess MSR	35.00%		35.00%
Servicer Advances | Servicer advance investments
Schedule of Equity Method Investments [Line Items]
Unpaid principal balance of underlying loans	$ 14,000,000		$ 14,000,000