FAIR VALUE OF ASSETS AND LIABILITIES - Impaired Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Assets and liabilities measured on non-recurring basis
Total Losses	$ 92	$ 5,132	$ 840	$ 7,972
Collateral-dependent impaired loans
Assets and liabilities measured on non-recurring basis
Total Losses	$ 92	$ 5,132	$ 840	7,948
Other real estate owned and repossessed assets
Assets and liabilities measured on non-recurring basis
Total Losses				$ 24
Level 3 | Discount | Minimum | Residential loans
Assets and liabilities measured on non-recurring basis
Measurement input	0		0
Level 3 | Discount | Minimum | Commercial real estate
Assets and liabilities measured on non-recurring basis
Measurement input	0		0
Level 3 | Discount | Minimum | Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0		0
Level 3 | Discount | Maximum | Residential loans
Assets and liabilities measured on non-recurring basis
Measurement input	0.20		0.20
Level 3 | Discount | Maximum | Commercial real estate
Assets and liabilities measured on non-recurring basis
Measurement input	0.50		0.50
Level 3 | Discount | Maximum | Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0.90		0.90
Non-recurring | Level 3
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 9,070		$ 9,070		$ 21,668
Non-recurring | Level 3 | Residential loans
Assets and liabilities measured on non-recurring basis
Assets, Fair value	8,996		8,996		21,615
Non-recurring | Level 3 | Collateral-dependent impaired loans | Sales Comparison Approach
Assets and liabilities measured on non-recurring basis
Assets, Fair value	5,862		5,862		21,615
Non-recurring | Level 3 | Other real estate owned and repossessed assets
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 74		$ 74		$ 53