LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	$ 1,617,562	$ 1,518,249
Interest receivable on loans	4,431	4,133
Total recorded investment in loans	1,621,993	1,522,382
Commercial and Agricultural
Composition of loan portfolio [Abstract]
Total recorded investment in loans	259,308	258,013
Commercial Mortgages
Composition of loan portfolio [Abstract]
Total recorded investment in loans	868,635	804,825
Commercial Mortgages | Construction
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	94,937	82,204
Total recorded investment in loans	95,210	82,435
Commercial Mortgages | Commercial mortgages, other
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	771,201	720,358
Total recorded investment in loans	773,425	722,390
Residential Mortgages
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	276,847	259,334
Total recorded investment in loans	277,567	259,967
Consumer Loans
Composition of loan portfolio [Abstract]
Total recorded investment in loans	216,483	199,577
Consumer Loans | Home equity lines and loans
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	73,770	70,670
Total recorded investment in loans	73,926	70,854
Consumer Loans | Indirect consumer loans
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	132,330	118,569
Total recorded investment in loans	132,601	118,855
Consumer Loans | Direct consumer loans
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	9,914	9,827
Total recorded investment in loans	9,956	9,868
Commercial and industrial | Commercial and Agricultural
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	258,474	256,893
Total recorded investment in loans	259,219	257,618
Agricultural | Commercial and Agricultural
Composition of loan portfolio [Abstract]
Total loans, net of deferred loan fees and costs	89	394
Total recorded investment in loans	$ 89	$ 395