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NON-CONSOLIDATED VARIABLE INTEREST ENTITIES (VIEs) AND SERVICING ASSETS - Key Economic Assumptions Used in Determining Fair Value at Time of Sale of Loans (Details)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Weighted Average [Member] | Conventional Loan [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 7.10% 6.80%
Discount rate 9.50% 9.50%
Weighted Average [Member] | Conventional Non Conforming Mortgage Loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 5.80% 6.00%
Discount rate 11.70% 11.50%
Weighted Average [Member] | Government-guaranteed mortgage loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 6.80% 6.90%
Discount rate 11.50% 11.50%
Maximum [Member] | Conventional Loan [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 12.80% 15.10%
Discount rate 9.50% 9.50%
Maximum [Member] | Conventional Non Conforming Mortgage Loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 9.00% 7.60%
Discount rate 12.50% 12.50%
Maximum [Member] | Government-guaranteed mortgage loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 16.60% 12.60%
Discount rate 11.50% 11.50%
Minimum [Member] | Conventional Loan [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 2.40% 2.90%
Discount rate 9.50% 9.50%
Minimum [Member] | Conventional Non Conforming Mortgage Loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 2.40% 4.40%
Discount rate 11.00% 11.00%
Minimum [Member] | Government-guaranteed mortgage loans [Member]    
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]    
Constant prepayment rate 3.90% 3.20%
Discount rate 11.50% 11.50%