LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Unpaid Principal Balance
Total	$ 7,374		$ 7,374		$ 18,205
Recorded Investment
Total	7,349		7,349		11,647
Allowance for Loan Losses Allocated	1,326		1,326		3,030
Average Recorded Investment
Average recorded investment, total	8,875	$ 11,525	9,798	$ 11,213
Interest Income Recognized
Total	22	35	69	67
Residential Mortgages
Unpaid Principal Balance
With no related allowance recorded	934		934		951
Recorded Investment
With no related allowance recorded	924		924		938
Average Recorded Investment
With no related allowance recorded	927	959	931	1,063
Interest Income Recognized
With no related allowance recorded	11	10	22	18
Construction | Commercial Mortgages
Unpaid Principal Balance
With no related allowance recorded	96		96		129
Recorded Investment
With no related allowance recorded	97		97		130
Average Recorded Investment
With no related allowance recorded	105	168	113	175
Interest Income Recognized
With no related allowance recorded	1	2	2	3
Commercial mortgages, other | Commercial Mortgages
Unpaid Principal Balance
With no related allowance recorded	4,071		4,071		6,940
With an allowance recorded	44		44		3,550
Recorded Investment
With no related allowance recorded	4,069		4,069		4,278
With an allowance recorded	44		44		3,559
Allowance for Loan Losses Allocated	44		44		1,571
Average Recorded Investment
With no related allowance recorded	4,088	4,780	4,151	4,774
With an allowance recorded	1,326	1,946	2,071	1,353
Interest Income Recognized
With no related allowance recorded	7	8	14	15
With an allowance recorded	0	0	21	0
Home equity lines and loans | Consumer Loans
Unpaid Principal Balance
With no related allowance recorded	169		169		185
With an allowance recorded	136		136		146
Recorded Investment
With no related allowance recorded	154		154		169
With an allowance recorded	136		136		146
Allowance for Loan Losses Allocated	43		43		65
Average Recorded Investment
With no related allowance recorded	157	193	161	339
With an allowance recorded	139	158	141	162
Interest Income Recognized
With no related allowance recorded	0	2	2	3
With an allowance recorded	0	0	0	0
Commercial and industrial | Commercial and Agricultural
Unpaid Principal Balance
With no related allowance recorded	603		603		954
With an allowance recorded	1,321		1,321		5,350
Recorded Investment
With no related allowance recorded	602		602		948
With an allowance recorded	1,323		1,323		1,479
Allowance for Loan Losses Allocated	1,239		1,239		$ 1,394
Average Recorded Investment
With no related allowance recorded	764	1,823	825	1,869
With an allowance recorded	1,369	1,498	1,405	1,478
Interest Income Recognized
With no related allowance recorded	0	13	3	26
With an allowance recorded	$ 3	$ 0	$ 5	$ 2