FAIR VALUE - Summary of assets measured at level 3 fair value on recurring basis (Details) - Significant Unobservable Inputs (Level 3) - Fair Value, Recurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Loans Held at Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 5,099	$ 10,190	$ 7,283	$ 13,726
Gains/(losses) in net income, net	25	66	114	166
Net charge-offs	7	299	64	1,016
Settlements	(909)	(1,311)	(3,125)	(4,230)
Balance at end of period	4,208	8,646	4,208	8,646
Guarantee Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	244	228	235	189
Originations	(9)	(21)	(29)	(68)
Gains/(losses) in net income, net	37	39	69	50
Settlements	(24)	(18)	(67)	(37)
Balance at end of period	266	270	266	270
Equity Warrants
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	765	795	765	795
Balance at end of period	$ 765	$ 795	$ 765	$ 795