SERVICER ADVANCE INVESTMENTS - Summary of Investments in Servicer Advances - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items]
Outstanding Servicer Advances	$ 339,646	$ 376,881
Face Amount of Secured Notes and Bonds Payable	31,501,279
Servicer Advance Investments | Servicer advance investments
Investments in and Advances to Affiliates [Line Items]
Residential mortgage loan UPB and other collateral	13,316,828	15,499,559
Outstanding Servicer Advances	$ 298,945	$ 320,630
Servicer Advances to UPB of Underlying Residential Mortgage Loans	2.20%	2.10%
Face Amount of Secured Notes and Bonds Payable	$ 258,183	$ 278,845
Gross Loan-to-Value	85.00%	84.10%
Net Loan-to-Value	82.90%	81.90%
Gross Cost of Funds	6.30%	7.50%
Net Cost of Funds	5.90%	6.90%