DEBT OBLIGATIONS - Schedule of Borrowing Capacity (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Residential mortgage loans, mortgage loans receivable, SFR and commercial notes receivable | Secured Financing Agreements
Debt Instrument [Line Items]
Borrowing Capacity	$ 6,367,565
Balance Outstanding	2,430,849
Available financing	3,936,716
Loan originations | Secured Financing Agreements
Debt Instrument [Line Items]
Borrowing Capacity	5,227,000
Balance Outstanding	2,464,912
Available financing	2,762,088
CLOs | Secured Financing Agreements
Debt Instrument [Line Items]
Borrowing Capacity	315,790
Balance Outstanding	179,858
Available financing	135,932
Excess MSRs | Secured Notes and Bonds Payable
Debt Instrument [Line Items]
Borrowing Capacity	286,380
Balance Outstanding	169,603
Available financing	116,778
MSRs | Secured Notes and Bonds Payable
Debt Instrument [Line Items]
Borrowing Capacity	5,938,911
Balance Outstanding	4,458,873
Available financing	1,480,038
Servicer advances | Secured Notes and Bonds Payable
Debt Instrument [Line Items]
Borrowing Capacity	3,805,000
Balance Outstanding	2,424,724
Available financing	1,380,276
SFR | Secured Notes and Bonds Payable
Debt Instrument [Line Items]
Borrowing Capacity	296,639
Balance Outstanding	194,997
Available financing	101,642
Consolidated funds | Liabilities of Consolidated Funds
Debt Instrument [Line Items]
Borrowing Capacity	52,500
Balance Outstanding	0
Available financing	52,500
Debt Excess Borrowing Capacity
Debt Instrument [Line Items]
Borrowing Capacity	22,289,785
Balance Outstanding	12,323,816
Available financing	$ 9,965,970