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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details)
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Fair Value Measurement Inputs and Valuation Techniques      
Expected weighted-average life (in years) 8 years 2 months 26 days    
Weighted Average | Discount rate      
Fair Value Measurement Inputs and Valuation Techniques      
Measurement input (as a percent) 0.0913 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