MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details) - Single family	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	22.61%	15.13%	19.87%	14.20%
CPRs | Low
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.0617		0.0617		0.0680
CPRs | High
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1310		0.1310		0.3250
CPRs | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.0747		0.0747		0.0700
Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	9.88%	11.70%	10.17%	10.83%
Discount rate | Low
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.0963		0.0963		0.1000
Discount rate | High
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1509		0.1509		0.1700
Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1012		0.1012		0.1000