LOANS AND ALLOWANCE FOR CREDIT LOSSES - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Total					$ 7,548
Impaired Financing Receivable, Recorded Investment [Abstract]
Total					7,522
Allowance for Loan Losses Allocated					1,147
Average Amortized Cost Basis
Average recorded investment, total	$ 6,386	$ 8,856	$ 6,751	$ 9,754
Interest Income Recognized
Total	13	22	21	69
Residential Mortgages
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
With no related allowance recorded					767
Impaired Financing Receivable, Recorded Investment [Abstract]
With no related allowance recorded					760
Average Amortized Cost Basis
With no related allowance recorded	358	909	479	895
Interest Income Recognized
With no related allowance recorded	0	11	0	22
Construction | Commercial Mortgages
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
With no related allowance recorded					5
Impaired Financing Receivable, Recorded Investment [Abstract]
With no related allowance recorded					5
Average Amortized Cost Basis
With no related allowance recorded	0	105	2	113
Interest Income Recognized
With no related allowance recorded	0	1	0	2
Commercial mortgages, other | Commercial Mortgages
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
With no related allowance recorded					4,346
With an allowance recorded					38
Impaired Financing Receivable, Recorded Investment [Abstract]
With no related allowance recorded					4,341
With an allowance recorded					38
Allowance for Loan Losses Allocated					38
Average Amortized Cost Basis
With no related allowance recorded	3,992	4,086	4,138	4,149
With an allowance recorded	34	1,326	35	2,065
Interest Income Recognized
With no related allowance recorded	8	7	14	14
With an allowance recorded	0	0	0	21
Home equity lines & loans | Consumer Loans
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
With no related allowance recorded					154
With an allowance recorded					126
Impaired Financing Receivable, Recorded Investment [Abstract]
With no related allowance recorded					138
With an allowance recorded					127
Allowance for Loan Losses Allocated					31
Average Amortized Cost Basis
With no related allowance recorded	178	157	165	161
With an allowance recorded	78	139	63	141
Interest Income Recognized
With no related allowance recorded	0	0	0	2
With an allowance recorded	3	0	3	0
Commercial and industrial | Commercial and Agricultural
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
With no related allowance recorded					1,026
With an allowance recorded					1,086
Impaired Financing Receivable, Recorded Investment [Abstract]
With no related allowance recorded					1,025
With an allowance recorded					1,088
Allowance for Loan Losses Allocated					$ 1,078
Average Amortized Cost Basis
With no related allowance recorded	516	765	686	825
With an allowance recorded	1,230	1,369	1,183	1,405
Interest Income Recognized
With no related allowance recorded	0	0	0	3
With an allowance recorded	$ 2	$ 3	$ 4	$ 5