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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 (Detail)
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
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% 7.40%
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 6.20% 5.90%
Discount rate 11.50% 12.90%
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% 6.70%
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 15.90% 16.00%
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 7.60% 9.00%
Discount rate 12.50% 14.00%
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% 11.60%
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 2.90% 3.80%
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 4.40% 2.10%
Discount rate 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 3.20% 4.80%
Discount rate 11.50% 11.50%