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FAIR VALUE - Significant Inputs Utilized in Cash Flow Models (Details) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2024 | Dec. 31, 2023
Fair Value Hierarchy |  |
Servicing rights, valuation technique [Extensible List] | us-gaap:ValuationTechniqueDiscountedCashFlowMember | us-gaap:ValuationTechniqueDiscountedCashFlowMember
SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, valuation technique [Extensible List] | us-gaap:ValuationTechniqueDiscountedCashFlowMember |
Significant Unobservable Inputs (Level 3) | Discount Rate | Minimum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.1275 | 0.1238
Significant Unobservable Inputs (Level 3) | Discount Rate | Minimum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.0674 | 0.0961
Significant Unobservable Inputs (Level 3) | Discount Rate | Maximum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.1525 | 0.1488
Significant Unobservable Inputs (Level 3) | Discount Rate | Maximum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.4255 | 0.4146
Significant Unobservable Inputs (Level 3) | Prepayment Rate |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.2625 |
Significant Unobservable Inputs (Level 3) | Prepayment Rate | Minimum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input |  | 0.2625
Significant Unobservable Inputs (Level 3) | Prepayment Rate | Minimum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.0894 | 0.0885
Significant Unobservable Inputs (Level 3) | Prepayment Rate | Maximum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input |  | 0.3024
Significant Unobservable Inputs (Level 3) | Prepayment Rate | Maximum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 0.3131 | 0.3024
Significant Unobservable Inputs (Level 3) | Weighted Average Life | Minimum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 1 year 6 months 3 days | 1 year 6 months 18 days
Significant Unobservable Inputs (Level 3) | Weighted Average Life | Minimum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 1 year | 1 year 29 days
Significant Unobservable Inputs (Level 3) | Weighted Average Life | Maximum |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 2 years 8 months 19 days | 2 years 9 months 10 days
Significant Unobservable Inputs (Level 3) | Weighted Average Life | Maximum | SBA Loans |  |
Fair Value Hierarchy |  |
Servicing rights, measurement input | 5 years 4 months 2 days | 5 years 8 months 15 days

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- Definition Weighted average life of financial assets and financial liabilities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-2 + Details
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