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FAIR VALUE MEASUREMENTS - Schedule of Quantitative Information about the Significant Unobservable Inputs within Level 3 (Details)
$ in Thousands
Sep. 30, 2024
USD ($)
uSDPerLoan
Dec. 31, 2023
USD ($)
uSDPerLoan
Quantitative information about the significant unobservable inputs within Level 3    
Trading Securities $ 5,560 $ 6,142
Securities available for sale, at fair value 661,740 1,022,285
Level 3    
Quantitative information about the significant unobservable inputs within Level 3    
Securities available for sale, at fair value 3,892 3,923
Level 3 | Recurring    
Quantitative information about the significant unobservable inputs within Level 3    
Trading Securities 5,560 6,142
Securities available for sale, at fair value 3,892 3,923
Loans held for investment 294 374
Total 11,349 12,020
Level 3 | Recurring | Commitments to lend    
Quantitative information about the significant unobservable inputs within Level 3    
Derivative asset 165 34
Level 3 | Recurring | Forward commitments    
Quantitative information about the significant unobservable inputs within Level 3    
Derivative asset 52 21
Level 3 | Recurring | Capitalized servicing rights    
Quantitative information about the significant unobservable inputs within Level 3    
Capitalized servicing rights $ 1,386 $ 1,526
Level 3 | Recurring | Discount Rate | Discounted Cash Flow    
Quantitative information about the significant unobservable inputs within Level 3    
Trading security, significant unobservable input value 0.0324 0.0419
Loan held for investment, significant unobservable input value 0.2500 0.2500
Level 3 | Recurring | Discount Rate | Discounted Cash Flow | Capitalized servicing rights    
Quantitative information about the significant unobservable inputs within Level 3    
Capitalized servicing rights, significant unobservable input value 0.1009 0.1108
Level 3 | Recurring | Price | Indication from Market Maker    
Quantitative information about the significant unobservable inputs within Level 3    
AFS Securities, significant unobservable input value 0.9729 0.9807
Level 3 | Recurring | Collateral Value | Discounted Cash Flow | Minimum    
Quantitative information about the significant unobservable inputs within Level 3    
Loan held for investment, significant unobservable input value 0.0 0.0
Level 3 | Recurring | Collateral Value | Discounted Cash Flow | Maximum    
Quantitative information about the significant unobservable inputs within Level 3    
Loan held for investment, significant unobservable input value 17,500,000 18,300,000
Level 3 | Recurring | Closing Ratio | Historical Trend | Commitments to lend    
Quantitative information about the significant unobservable inputs within Level 3    
Commitments, significant unobservable input value 0.8571 0.8429
Level 3 | Recurring | Closing Ratio | Historical Trend | Forward commitments    
Quantitative information about the significant unobservable inputs within Level 3    
Commitments, significant unobservable input value 0.8571 0.8429
Level 3 | Recurring | Origination Costs, per loan | Pricing Model | Commitments to lend    
Quantitative information about the significant unobservable inputs within Level 3    
Commitments, significant unobservable input value | uSDPerLoan 3,000 3,000
Level 3 | Recurring | Origination Costs, per loan | Pricing Model | Forward commitments    
Quantitative information about the significant unobservable inputs within Level 3    
Commitments, significant unobservable input value | uSDPerLoan 3,000 3,000
Level 3 | Recurring | Constant Prepayment Rate (CPR) | Discounted Cash Flow | Capitalized servicing rights    
Quantitative information about the significant unobservable inputs within Level 3    
Capitalized servicing rights, significant unobservable input value 0.0726 0.0763