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MORTGAGE BANKING OPERATIONS - Sensitivity Analysis (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Single family mortgage servicing rights $ 76,617    
Expected weighted-average life (in years) 7 years 9 months 7 days    
Constant Prepayment Rate [Abstract]      
Impact on fair value of 25 basis points adverse change in interest rates $ (447)    
Impact on fair value of 50 basis points adverse change in interest rates (1,045)    
Discount Rate [Abstract]      
Impact on fair value of 100 basis points increase (3,150)    
Impact on fair value of 200 basis points increase $ (6,062)    
CPRs      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 10.91% 8.84% 11.37%
CPRs | Minimum      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 6.01% 7.90%  
CPRs | Maximum      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 11.10% 17.35%  
CPRs | Weighted Average      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 8.19% 10.35%  
Discount Rates      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 9.35% 8.23% 7.82%
Discount Rates | Minimum      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 9.74% 6.94%  
Discount Rates | Maximum      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 16.88% 13.96%  
Discount Rates | Weighted Average      
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs      
Measurement input 10.66% 7.97%