LOANS AND ASSET QUALITY - Current, past due, and non-accrual loans by categories of loans and restructured loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 265,864	$ 259,529
90 Days or More and Still Accruing	57	36
Non-accrual	3,527	3,751	$ 3,751	$ 3,779
Total	272,031	266,106
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,583	2,790
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,690	4,679
90 Days or More and Still Accruing
Non-accrual
Total	3,739	4,679
Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	49
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	65,015	68,775
90 Days or More and Still Accruing
Non-accrual	640	647	647	300
Total	65,655	69,422
Commercial real estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Consumer and indirect
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	94,343	82,134
90 Days or More and Still Accruing
Non-accrual	331	456
Total	95,509	83,582
Consumer and indirect | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	835	992
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	102,816	103,941
90 Days or More and Still Accruing	57	36
Non-accrual	2,556	2,648	$ 2,648	$ 2,883
Total	107,128	108,423
Residential real estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 1,699	$ 1,798