LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowances by Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Allowance for credit losses
Individually analyzed	$ 1,687	$ 1,955
Collectively analyzed	18,784	20,562
Total ending allowance balance	20,471	22,517	$ 20,075	$ 19,659
Amortized cost basis of loans:
Individually analyzed	5,711	8,035
Collectively analyzed	1,997,899	1,964,629
Total loans, net of deferred loan fees and costs	2,003,610	1,972,664
Collateral Pledged
Allowance for credit losses
Total ending allowance balance	225	267
Amortized cost basis of loans:
Individually analyzed	4,248	6,347
Commercial and Agricultural
Allowance for credit losses
Individually analyzed	1,663	1,928
Collectively analyzed	2,853	3,127
Total ending allowance balance	4,516	5,055	4,053	3,373
Amortized cost basis of loans:
Individually analyzed	1,746	2,067
Collectively analyzed	277,889	262,329
Total loans, net of deferred loan fees and costs	279,635	264,396
Commercial Mortgages
Allowance for credit losses
Individually analyzed	24	27
Collectively analyzed	10,343	11,999
Total ending allowance balance	10,367	12,026	10,983	11,576
Amortized cost basis of loans:
Individually analyzed	3,965	5,968
Collectively analyzed	1,141,837	1,116,957
Total loans, net of deferred loan fees and costs	1,145,802	1,122,925
Residential Mortgages
Allowance for credit losses
Individually analyzed	0	0
Collectively analyzed	2,062	2,194
Total ending allowance balance	2,062	2,194	1,892	1,845
Amortized cost basis of loans:
Individually analyzed	0	0
Collectively analyzed	277,246	277,992
Total loans, net of deferred loan fees and costs	277,246	277,992
Consumer Loans
Allowance for credit losses
Individually analyzed	0	0
Collectively analyzed	3,526	3,242
Total ending allowance balance	3,526	3,242	$ 3,147	$ 2,865
Amortized cost basis of loans:
Individually analyzed	0	0
Collectively analyzed	300,927	307,351
Total loans, net of deferred loan fees and costs	$ 300,927	$ 307,351