NON-CONSOLIDATED VARIABLE INTEREST ENTITIES (VIEs) AND SERVICING ASSETS - Key Economic Assumptions Used in Determining Fair Value at Time of Sale of Loans (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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	6.80%	7.30%	7.40%
Discount rate	9.50%	9.50%	9.70%
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	6.20%	6.00%	6.00%
Discount rate	11.40%	12.60%	12.50%
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	6.70%	6.60%	6.70%
Discount rate	11.50%	11.50%	11.70%
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	20.60%	16.90%	18.40%
Discount rate	9.50%	10.00%	10.00%
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	8.00%	9.00%	21.90%
Discount rate	12.50%	14.00%	14.50%
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	17.10%	18.00%	18.30%
Discount rate	11.50%	11.50%	12.00%
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	2.10%	2.40%	3.40%
Discount rate	9.50%	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	2.80%	2.10%	3.60%
Discount rate	11.00%	11.00%	11.50%
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	3.00%	3.80%	4.80%
Discount rate	11.50%	11.50%	11.50%