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FAIR VALUE - Significant Inputs Utilized in Cash Flow Models (Details)	3 Months Ended	12 Months Ended
	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

X

- Definition

Value of input used to measure servicing asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Indicates valuation technique for measuring servicing asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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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

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