FAIR VALUE - Summary of assets measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Guarantee asset
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net income available for common shareholders	Net income available for common shareholders	Net income available for common shareholders	Net income available for common shareholders
Corporate bonds
Guarantee asset
Transfer to held-to-maturity		$ (6,215)		$ (6,215)
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Corporate bonds
Guarantee asset
Balance at beginning of period	$ 0	6,215	$ 0	2,113
Loans acquired				4,000
Balance at end of period	0	0	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Loans Held at Fair Value
Guarantee asset
Balance at beginning of period	20,807	6,380	23,321
Loans acquired		17,869	1,162	24,249
Gains/(losses) in net income, net	(507)	328	(657)	328
Settlements	(2,777)	(3,100)	(6,303)	(3,100)
Balance at end of period	17,523	21,477	17,523	21,477
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Forward commitments and FSC
Guarantee asset
Balance at beginning of period			0	(9)
Loans acquired			0	9
Balance at end of period	0	0	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Guarantee Asset
Guarantee asset
Balance at beginning of period	235	206	143	237
Loans transferred from held for investment	9		14
Gains/(losses) in net income, net	(78)	(32)	9	(63)
Balance at end of period	166	174	166	174
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| IRLC, net
Guarantee asset
Balance at beginning of period	723	990	229	1,473
Loans acquired	454	1,083	1,340	2,697
Loans transferred from held for investment	692	2,063	2,178	3,417
Gains/(losses) in net income, net	(32)	826	1,062	83
Balance at end of period	453	836	453	836
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Equity Warrants
Guarantee asset
Balance at beginning of period	825	402	825	160
Loans acquired				242
Gains/(losses) in net income, net		323		323
Balance at end of period	$ 825	$ 725	$ 825	$ 725

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Unrealized Gains, Net

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

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

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- Definition

Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Indicates line item in statement in which net income is reported that includes gain (loss) from asset measured at fair value using unobservable input (level 3).

+ References

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