FAIR VALUE OF ASSETS AND LIABILITIES - Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Collateral-dependent impaired loans
Assets and liabilities measured on non-recurring basis
Total Losses	$ 29	$ 848
Level 3 | Discount | Minimum | Residential loans
Assets and liabilities measured on non-recurring basis
Measurement input	0
Level 3 | Discount | Minimum | Commercial real estate
Assets and liabilities measured on non-recurring basis
Measurement input	0
Level 3 | Discount | Minimum | Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0
Level 3 | Discount | Maximum | Residential loans
Assets and liabilities measured on non-recurring basis
Measurement input	0.20
Level 3 | Discount | Maximum | Commercial real estate
Assets and liabilities measured on non-recurring basis
Measurement input	0.50
Level 3 | Discount | Maximum | Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0.90
Non-recurring | Level 3
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 108		$ 349
Non-recurring | Level 3 | Residential loans
Assets and liabilities measured on non-recurring basis
Assets, Fair value	108		$ 349
Non-recurring | Level 3 | Collateral-dependent impaired loans | Sales Comparison Approach
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 108	$ 5,717