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MORTGAGE BANKING OPERATIONS - Sensitivity Analysis (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
USD ($)
Dec. 31, 2022
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Fair value of single family MSR $ 75,701  
Expected weighted-average life (in years) 8 years 4 months 24 days  
Constant Prepayment Rate [Abstract]    
Impact on fair value of 25 basis points adverse change in interest rates $ (941)  
Impact on fair value of 50 basis points adverse change in interest rates (2,148)  
Discount Rate [Abstract]    
Impact on fair value of 100 basis points increase (2,000)  
Impact on fair value of 200 basis points increase $ (4,984)  
Low | CPRs    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.0634 0.0601
Low | Discount rate    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.0933 0.0974
High | CPRs    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.3001 0.1110
High | Discount rate    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.1495 0.1688
Weighted Average | CPRs    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.0669 0.0819
Weighted Average | Discount rate    
Key economic assumptions and the sensitivity of the current fair value for single family MSRs    
Measurement input (as a percent) 0.1007 0.1066