LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finance receivable by credit quality indicator [Abstract]
Loans	$ 1,310,320	$ 1,315,609
Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	425,394	444,641
Pass
Finance receivable by credit quality indicator [Abstract]
Loans	832,180	819,733
Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	15,226	21,282
Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	31,402	26,847
Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	6,118	3,106
Commercial and agricultural
Finance receivable by credit quality indicator [Abstract]
Loans	227,725	203,412
Commercial Mortgages
Finance receivable by credit quality indicator [Abstract]
Loans	653,405	662,988
Commercial Mortgages | Construction
Finance receivable by credit quality indicator [Abstract]
Loans	48,769	54,626
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	48,682	54,517
Commercial Mortgages | Construction | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Commercial Mortgages | Construction | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	87	109
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	604,636	608,362
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	572,663	574,221
Commercial Mortgages | Commercial mortgages | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	10,976	16,830
Commercial Mortgages | Commercial mortgages | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	16,522	15,948
Commercial Mortgages | Commercial mortgages | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	4,475	1,363
Residential mortgages
Finance receivable by credit quality indicator [Abstract]
Loans	184,569	183,225
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	184,569	183,225
Residential mortgages | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	182,114	180,570
Residential mortgages | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	2,455	2,655
Residential mortgages | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	182,114	180,570
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	2,455	2,655
Residential mortgages | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	0	0
Consumer Loans
Finance receivable by credit quality indicator [Abstract]
Loans	244,621	265,984
Consumer Loans | Credit cards
Finance receivable by credit quality indicator [Abstract]
Loans		1,450
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	0	1,450
Consumer Loans | Credit cards | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	0	1,450
Consumer Loans | Credit cards | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	0	0
Consumer Loans | Credit cards | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans		1,450
Consumer Loans | Credit cards | Pass
Finance receivable by credit quality indicator [Abstract]
Loans		0
Consumer Loans | Credit cards | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans		0
Consumer Loans | Credit cards | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans		0
Consumer Loans | Credit cards | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans		0
Consumer Loans | Home equity lines and loans
Finance receivable by credit quality indicator [Abstract]
Loans	92,752	98,466
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	92,752	98,466
Consumer Loans | Home equity lines and loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	92,030	97,283
Consumer Loans | Home equity lines and loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	722	1,183
Consumer Loans | Home equity lines and loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	92,030	97,283
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	722	1,183
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	136,840	149,806
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	136,840	149,806
Consumer Loans | Indirect consumer loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	136,227	149,113
Consumer Loans | Indirect consumer loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	613	693
Consumer Loans | Indirect consumer loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	136,227	149,113
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	613	693
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	15,029	16,262
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	15,029	16,262
Consumer Loans | Direct consumer loans | Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	15,023	16,225
Consumer Loans | Direct consumer loans | Non-Performing
Residential and consumer finance receivable [Abstract]
Residential and consumer loans receivable	6	37
Consumer Loans | Direct consumer loans | Not Rated
Finance receivable by credit quality indicator [Abstract]
Loans	15,023	16,225
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	6	37
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	227,510	203,083
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	210,620	190,666
Commercial and industrial | Commercial and agricultural | Special Mention
Finance receivable by credit quality indicator [Abstract]
Loans	4,250	4,452
Commercial and industrial | Commercial and agricultural | Substandard
Finance receivable by credit quality indicator [Abstract]
Loans	10,997	6,222
Commercial and industrial | Commercial and agricultural | Doubtful
Finance receivable by credit quality indicator [Abstract]
Loans	1,643	1,743
Agricultural | Commercial and agricultural
Finance receivable by credit quality indicator [Abstract]
Loans	215	329
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	215	329
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