FAIR VALUE - Quantitative information measured at fair value on non-nonrecurring basis (Details) - Nonrecurring - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Multi-family \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value		$ 378
Commercial real estate \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value		991
Commercial real estate \| Other real estate
FAIR VALUE
Assets measured at fair value		650
Commercial and industrial \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value		6,084
Income approach \| Multi-family \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value	$ 378	$ 378
Income approach \| Multi-family \| Collateral-dependent loans \| Minimum
FAIR VALUE
Percentage of weighted average	4.00%	4.00%
Income approach \| Multi-family \| Collateral-dependent loans \| Maximum
FAIR VALUE
Percentage of weighted average	9.40%	9.40%
Income approach \| Multi-family \| Collateral-dependent loans \| Weighted Average
FAIR VALUE
Percentage of weighted average	8.50%	8.50%
Income approach \| Commercial real estate \| Other real estate
FAIR VALUE
Assets measured at fair value	$ 650	$ 650
Income approach \| Commercial real estate \| Other real estate \| Minimum
FAIR VALUE
Percentage of weighted average	5.50%	5.50%
Income approach \| Commercial real estate \| Other real estate \| Maximum
FAIR VALUE
Percentage of weighted average	12.00%	12.00%
Income approach \| Commercial real estate \| Other real estate \| Weighted Average
FAIR VALUE
Percentage of weighted average	9.00%	9.00%
Income approach \| Commercial and industrial \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value		$ 6,084
Income approach \| Commercial and industrial \| Collateral-dependent loans \| Minimum
FAIR VALUE
Percentage of weighted average	5.00%	5.00%
Income approach \| Commercial and industrial \| Collateral-dependent loans \| Maximum
FAIR VALUE
Percentage of weighted average	9.50%	9.50%
Income approach \| Commercial and industrial \| Collateral-dependent loans \| Weighted Average
FAIR VALUE
Percentage of weighted average		8.50%
Sales comparison approach \| Commercial real estate \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value		$ 991
Sales comparison approach \| Commercial real estate \| Collateral-dependent loans \| Minimum
FAIR VALUE
Percentage of weighted average		5.00%
Sales comparison approach \| Commercial real estate \| Collateral-dependent loans \| Maximum
FAIR VALUE
Percentage of weighted average		20.00%
Sales comparison approach \| Commercial real estate \| Collateral-dependent loans \| Weighted Average
FAIR VALUE
Percentage of weighted average		10.00%
Sales comparison approach \| Commercial and industrial \| Collateral-dependent loans
FAIR VALUE
Assets measured at fair value	$ 5,678
Sales comparison approach \| Commercial and industrial \| Collateral-dependent loans \| Weighted Average
FAIR VALUE
Percentage of weighted average	8.50%