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		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Loans Held at Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 3,182	$ 7,283	$ 7,283
Gains/(losses) in net income, net	10	57
Net charge-offs	(49)	(51)
Settlements	(675)	(1,177)
Balance at end of period	2,468	6,112	3,182
Guarantee Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	243	235	235
Loans originated	4	11
Gains/(losses) in net income, net	27	36
Settlements	(24)	(21)
Balance at end of period	250	261	243
Equity Warrants
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	756	765	765
Balance at end of period	$ 756	$ 765	$ 756