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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details) - Discount rates	Mar. 31, 2026	Dec. 31, 2025
Multifamily
Fair Value Measurement Inputs and Valuation Techniques
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Minimum | Multifamily
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1300	0.1300
Maximum | Multifamily
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1500	0.1500
Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.0911	0.0897
Weighted Average | Multifamily
Fair Value Measurement Inputs and Valuation Techniques
Measurement input (as a percent)	0.1307	0.1307

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