MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Schedule of Geographic Distribution of the Underlying Residential Mortgage Loans of the MSRs and MSR Financing Receivables (Details) - MSRs - Mortgage Loans	Jun. 30, 2024	Dec. 31, 2023
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	100.00%	100.00%
California
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	16.70%	17.10%
Florida
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	8.40%	8.60%
Texas
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	6.50%	6.20%
New York
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	5.80%	6.00%
Washington
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	5.30%	5.80%
New Jersey
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	4.10%	4.30%
Virginia
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	3.60%	3.60%
Maryland
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	3.40%	3.40%
Illinois
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	3.30%	3.30%
Georgia
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	3.10%	3.00%
Other US
Schedule of MSRs [Line Items]
Percentage of Total Outstanding Unpaid Principal Amount	39.80%	38.70%