LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Quality Indicator (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finance receivable by credit quality indicator [Abstract]
Loans	$ 1,502,746	$ 1,312,903
Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	429,154	428,037
Pass
Finance receivable by credit quality indicator [Abstract]
Loans	1,023,167	826,396
Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	19,306	18,534
Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	23,556	29,701
Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	7,563	10,235
Commercial and agricultural
Finance receivable by credit quality indicator [Abstract]
Loans	396,698	230,922
Commercial Mortgages
Finance receivable by credit quality indicator [Abstract]
Loans	672,540	650,570
Commercial Mortgages | Construction
Finance receivable by credit quality indicator [Abstract]
Loans	47,329	44,082
Commercial Mortgages | Construction | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial Mortgages | Construction | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	43,235	40,304
Commercial Mortgages | Construction | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	546	168
Commercial Mortgages | Construction | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	3,548	3,610
Commercial Mortgages | Construction | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial Mortgages | Commercial mortgages
Finance receivable by credit quality indicator [Abstract]
Loans	625,211	606,488
Commercial Mortgages | Commercial mortgages | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial Mortgages | Commercial mortgages | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	596,641	577,266
Commercial Mortgages | Commercial mortgages | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	14,436	12,451
Commercial Mortgages | Commercial mortgages | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	11,868	12,356
Commercial Mortgages | Commercial mortgages | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	2,266	4,415
Residential mortgages
Finance receivable by credit quality indicator [Abstract]
Loans	208,693	188,874
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	208,693	188,874
Residential mortgages | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	206,156	186,719
Residential mortgages | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	2,537	2,155
Residential mortgages | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	206,156	186,719
Residential mortgages | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Residential mortgages | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Residential mortgages | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	2,537	2,155
Residential mortgages | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans
Finance receivable by credit quality indicator [Abstract]
Loans	224,815	242,537
Consumer Loans | Home equity lines and loans
Finance receivable by credit quality indicator [Abstract]
Loans	86,184	92,065
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	86,184	92,065
Consumer Loans | Home equity lines and loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	85,123	91,424
Consumer Loans | Home equity lines and loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	1,061	641
Consumer Loans | Home equity lines and loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	85,123	91,424
Consumer Loans | Home equity lines and loans | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Home equity lines and loans | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Home equity lines and loans | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	1,061	641
Consumer Loans | Home equity lines and loans | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Indirect consumer loans
Finance receivable by credit quality indicator [Abstract]
Loans	125,318	135,366
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	125,318	135,366
Consumer Loans | Indirect consumer loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	124,563	134,795
Consumer Loans | Indirect consumer loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	755	571
Consumer Loans | Indirect consumer loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	124,563	134,795
Consumer Loans | Indirect consumer loans | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Indirect consumer loans | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Indirect consumer loans | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	755	571
Consumer Loans | Indirect consumer loans | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Direct consumer loans
Finance receivable by credit quality indicator [Abstract]
Loans	13,313	15,106
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	13,313	15,106
Consumer Loans | Direct consumer loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	13,312	15,099
Consumer Loans | Direct consumer loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	1	7
Consumer Loans | Direct consumer loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	13,312	15,099
Consumer Loans | Direct consumer loans | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Direct consumer loans | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans | Direct consumer loans | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	1	7
Consumer Loans | Direct consumer loans | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial and industrial | Commercial and agricultural
Finance receivable by credit quality indicator [Abstract]
Loans	396,280	230,648
Commercial and industrial | Commercial and agricultural | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial and industrial | Commercial and agricultural | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	382,873	208,552
Commercial and industrial | Commercial and agricultural | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	4,324	5,915
Commercial and industrial | Commercial and agricultural | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	3,786	10,361
Commercial and industrial | Commercial and agricultural | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	5,297	5,820
Agricultural | Commercial and agricultural
Finance receivable by credit quality indicator [Abstract]
Loans	418	274
Agricultural | Commercial and agricultural | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Agricultural | Commercial and agricultural | Pass
Finance receivable by credit quality indicator [Abstract]
Loans	418	274
Agricultural | Commercial and agricultural | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Agricultural | Commercial and agricultural | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Agricultural | Commercial and agricultural | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	$ 0	$ 0