MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Jan. 31, 2018	Jul. 31, 2017
Schedule of MSRs [Line Items]
Residential mortgage loan repurchase liability	[1]	$ 1,296,097		$ 1,219,890
Residential mortgage loans, held-for-sale		3,092,667		3,398,298
Reserve for non-recovery advances		$ 92,881		$ 65,428
Reserve for non-recovery advances, percent		3.70%		2.30%
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		$ 11,900,000
PHH Mortgage Corporation
Schedule of MSRs [Line Items]
Subservicer percent of UPB		8.80%
Mr. Cooper
Schedule of MSRs [Line Items]
Subservicer percent of UPB		7.60%
LoanCare
Schedule of MSRs [Line Items]
Subservicer percent of UPB		5.50%
Valon
Schedule of MSRs [Line Items]
Subservicer percent of UPB		2.60%
Flagstar Bank
Schedule of MSRs [Line Items]
Subservicer percent of UPB		0.10%
Newrez and Caliber
Schedule of MSRs [Line Items]
Subservicer percent of UPB		75.40%
Ginnie Mae Loans
Schedule of MSRs [Line Items]
Residential mortgage loans, held-for-sale		$ 500,000
Ocwen
Schedule of MSRs [Line Items]
Residential mortgage loan UPB and other collateral					$ 86,800,000	$ 110,000,000
Mortgage Loans Serviced
Schedule of MSRs [Line Items]
Residential mortgage loan UPB and other collateral		95,600,000	$ 87,200,000
Subservicing revenue		$ 69,100	$ 66,100

[1] See Note 5 for details.