MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Jan. 31, 2018	Jul. 31, 2017
Schedule of MSRs [Line Items]
Residential mortgage loan repurchase liability	[1]	$ 1,758,509		$ 1,787,314
Residential mortgage loans, held-for-sale		5,410,989		11,347,845
Reserve for non-recovery advances		32,454		$ 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		$ 13,000,000
PHH Mortgage Corporation
Schedule of MSRs [Line Items]
Subservicer percent of UPB		9.50%
Mr. Cooper
Schedule of MSRs [Line Items]
Subservicer percent of UPB		8.40%
LoanCare
Schedule of MSRs [Line Items]
Subservicer percent of UPB		7.10%
Valon
Schedule of MSRs [Line Items]
Subservicer percent of UPB		1.50%
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		73.20%
Ginnie Mae Loans
Schedule of MSRs [Line Items]
Residential mortgage loans, held-for-sale		$ 900,000
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		87,200,000	$ 76,400,000
Subservicing revenue		$ 66,100	$ 84,200

[1] See Note 5 for details.