MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019	Jan. 31, 2018	Jul. 31, 2017
Schedule of MSRs [Line Items]
Residential mortgage loans subject to repurchase	$ 1,787,314	[1]	$ 1,452,005	[1]	$ 172,336
Residential mortgage loans, held-for-sale	11,347,845		5,215,703
Reserve for non-recovery advances	32,122		22,849		$ 1,680
Mortgage Loans Subserviced
Schedule of MSRs [Line Items]
UPB of Underlying Mortgages	78,800,000		66,900,000
Subservicing revenue	158,500		201,600
Ocwen | New Residential Mortgage LLC | MSRs
Schedule of MSRs [Line Items]
Unpaid Principal Balance of underlying loans transferred	66,700,000
Ocwen | New Residential Mortgage LLC
Schedule of MSRs [Line Items]
UPB of underlying loans, not yet transferred	$ 14,000,000		16,300,000
PHH Mortgage Corporation
Schedule of MSRs [Line Items]
Subservicer percent of UPB	10.40%
Mr. Cooper
Schedule of MSRs [Line Items]
Subservicer percent of UPB	9.40%
LoanCare
Schedule of MSRs [Line Items]
Subservicer percent of UPB	8.10%
Valon
Schedule of MSRs [Line Items]
Subservicer percent of UPB	0.90%
Flagstar
Schedule of MSRs [Line Items]
Subservicer percent of UPB	0.30%
Mortgage Company
Schedule of MSRs [Line Items]
Subservicer percent of UPB	70.90%
Ginnie Mae Loans
Schedule of MSRs [Line Items]
Residential mortgage loans, held-for-sale	$ 1,082,300		$ 810,900
Ocwen
Schedule of MSRs [Line Items]
UPB of Underlying Mortgages						$ 86,800,000	$ 110,000,000

[1] See Note 6 for details.