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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details)	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques
Expected weighted-average life (in years)	8 years 3 months 21 days
Weighted Average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1027	0.1100
Weighted Average | Multifamily | Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1310	0.1310	0.1300
High | Multifamily | Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1500	0.1500
Low | Multifamily | Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1300	0.1300

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