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FAIR VALUE DISCLOSURES, Quantitative Information about Recurring and Non-Recurring Level 3 Fair Value Measurements (Details)
$ in Thousands
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Mortgage servicing rights $ 26,843 $ 26,569 $ 25,795 $ 27,474
Non-recurring [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Loans held for investment 228 1,482    
Non-recurring [Member] | Third Party Appraisals or Inspections [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Loans held for investment $ 228 $ 1,482    
Non-recurring [Member] | Third Party Appraisals or Inspections [Member] | Collateral Discounts and Selling Costs [Member] | Minimum [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Loans held for investment, measurement input 0.20 0.20    
Non-recurring [Member] | Third Party Appraisals or Inspections [Member] | Collateral Discounts and Selling Costs [Member] | Maximum [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Loans held for investment, measurement input 0.25 1    
Recurring [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Mortgage servicing rights $ 26,843 $ 26,569    
Recurring [Member] | Discounted Cash Flows [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Mortgage servicing rights $ 26,843 $ 26,569    
Recurring [Member] | Discounted Cash Flows [Member] | Constant Prepayment Rate [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Mortgage servicing rights, measurement input 0.0738 0.0746    
Recurring [Member] | Discounted Cash Flows [Member] | Discount Rate [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Abstract]        
Mortgage servicing rights, measurement input 0.1016 0.1066