MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Jan. 31, 2018	Jul. 31, 2017
Schedule of MSRs [Line Items]
Residential mortgage loan repurchase liability	[1]	$ 1,897,142		$ 1,787,314
Residential mortgage loans, held-for-sale		4,037,411		11,347,845
Reserve for non-recovery advances		44,300		$ 32,122
Ocwen | Rithm Capital
Schedule of MSRs [Line Items]
Unpaid principal balance of underlying loans, transferred		66,700,000
Unpaid principal balance of underlying loans, not yet transferred		$ 12,700,000
PHH Mortgage Corporation
Schedule of MSRs [Line Items]
Subservicer percent of UPB		9.30%
Mr. Cooper
Schedule of MSRs [Line Items]
Subservicer percent of UPB		8.20%
LoanCare
Schedule of MSRs [Line Items]
Subservicer percent of UPB		6.20%
Valon
Schedule of MSRs [Line Items]
Subservicer percent of UPB		2.00%
Flagstar Bank
Schedule of MSRs [Line Items]
Subservicer percent of UPB		0.30%
Newrez And Caliber
Schedule of MSRs [Line Items]
Subservicer percent of UPB		74.00%
Ginnie Mae Loans
Schedule of MSRs [Line Items]
Residential mortgage loans, held-for-sale		$ 800,000
Ocwen
Schedule of MSRs [Line Items]
Residential mortgage loan UPB and other collateral					$ 86,800,000	$ 110,000,000
Mortgage Loans Subserviced
Schedule of MSRs [Line Items]
Residential mortgage loan UPB and other collateral		91,800,000	$ 75,800,000
Subservicing revenue		$ 100,400	$ 123,700

[1] See Note 5 for details.