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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details)	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
CPRs | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.0677	0.0660
CPRs | Single family | Low
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.0580	0.0600
CPRs | Single family | High
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1400	0.1350
CPRs | Single family | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1796		0.1930
Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1027	0.1100
Discount rate | Single family | Low
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1000	0.1000
Discount rate | Single family | High
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1600	0.1700
Discount rate | Single family | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Servicing Asset, Measurement Input	0.1014		0.1018

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