FAIR VALUE - Summary of assets measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
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
Derivative Asset	$ 1,441		$ 1,441		$ 763
Fair Value, Recurring | Forward commitments and FSC
Guarantee asset
Derivative Asset	85		85		7
Fair Value, Recurring | IRLC, net
Guarantee asset
Derivative Asset	1,078		1,078		345
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Loans Held at Fair Value
Guarantee asset
Balance at beginning of period	10,190	$ 17,523	13,726	$ 23,321
Loans acquired				1,162
Gains/(losses) in net income, net	66	110	166	(547)
Settlements	(1,311)	(1,806)	(4,230)	(7,101)
Balance at end of period	8,646	15,464	8,646	15,464
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Net Charge Off	(299)	(363)	(1,016)	(1,371)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Forward commitments and FSC
Guarantee asset
Derivative Asset	0		0		0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Guarantee Asset
Guarantee asset
Balance at beginning of period	228	166	189	143
Loans transferred from held for investment	21	6	68	20
Gains/(losses) in net income, net	39	(8)	50	11
Settlements	(18)	(6)	(37)	(16)
Balance at end of period	270	158	270	158
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | IRLC, net
Guarantee asset
Balance at beginning of period	912	453	345	229
Loans acquired	1,078	312	2,803	1,652
Loans transferred from held for investment	1,345	606	3,458	2,784
Gains/(losses) in net income, net	433	160	1,388	1,222
Balance at end of period	1,078	319	1,078	319
Derivative Asset	1,078		1,078		345
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Equity Warrants
Guarantee asset
Balance at beginning of period	795	825	795	825
Balance at end of period	795	$ 825	795	$ 825
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Forward commitments and FSC
Guarantee asset
Derivative Asset	0		0		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | IRLC, net
Guarantee asset
Derivative Asset	0		0		0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Forward commitments and FSC
Guarantee asset
Derivative Asset	85		85		7
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | IRLC, net
Guarantee asset
Derivative Asset	$ 0		$ 0		$ 0