LOANS - Summary Information Pertaining to Non-accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Non-accrual loans
Non-accrual loans	$ 5,303	$ 6,496
Business Activities Loans
Non-accrual loans
Non-accrual loans	4,601	6,496
Acquired Loans
Non-accrual loans
Non-accrual loans	702	0
Commercial Real Estate:
Non-accrual loans
Non-accrual loans	2,091	2,564
Commercial Real Estate: | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,894	2,564
Commercial Real Estate: | Acquired Loans
Non-accrual loans
Non-accrual loans	197	0
Commercial Real Estate: | Construction and land development
Non-accrual loans
Non-accrual loans	637	0
Commercial Real Estate: | Construction and land development | Business Activities Loans
Non-accrual loans
Non-accrual loans	637	0
Commercial Real Estate: | Construction and land development | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Commercial Real Estate: | Other commercial real estate
Non-accrual loans
Non-accrual loans	1,454	2,564
Commercial Real Estate: | Other commercial real estate | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,257	2,564
Commercial Real Estate: | Other commercial real estate | Acquired Loans
Non-accrual loans
Non-accrual loans	197	0
Commercial and Industrial:
Non-accrual loans
Non-accrual loans	270	315
Commercial and Industrial: | Business Activities Loans
Non-accrual loans
Non-accrual loans	237	315
Commercial and Industrial: | Acquired Loans
Non-accrual loans
Non-accrual loans	33	0
Commercial and Industrial: | Other Commercial
Non-accrual loans
Non-accrual loans	224	284
Commercial and Industrial: | Other Commercial | Business Activities Loans
Non-accrual loans
Non-accrual loans	191	284
Commercial and Industrial: | Other Commercial | Acquired Loans
Non-accrual loans
Non-accrual loans	33	0
Commercial and Industrial: | Agricultural and other loans to farmers
Non-accrual loans
Non-accrual loans	46	31
Commercial and Industrial: | Agricultural and other loans to farmers | Business Activities Loans
Non-accrual loans
Non-accrual loans	46	31
Commercial and Industrial: | Agricultural and other loans to farmers | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Commercial and Industrial: | Tax exempt
Non-accrual loans
Non-accrual loans	0	0
Commercial and Industrial: | Tax exempt | Business Activities Loans
Non-accrual loans
Non-accrual loans	0	0
Commercial and Industrial: | Tax exempt | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Total Commercial Loans:
Non-accrual loans
Non-accrual loans	2,361	2,879
Total Commercial Loans: | Business Activities Loans
Non-accrual loans
Non-accrual loans	2,131	2,879
Total Commercial Loans: | Acquired Loans
Non-accrual loans
Non-accrual loans	230	0
Residential Real Estate:
Non-accrual loans
Non-accrual loans	2,782	3,419
Residential Real Estate: | Business Activities Loans
Non-accrual loans
Non-accrual loans	2,313	3,419
Residential Real Estate: | Acquired Loans
Non-accrual loans
Non-accrual loans	469	0
Residential Real Estate: | Residential mortgages
Non-accrual loans
Non-accrual loans	2,782	3,419
Residential Real Estate: | Residential mortgages | Business Activities Loans
Non-accrual loans
Non-accrual loans	2,313	3,419
Residential Real Estate: | Residential mortgages | Acquired Loans
Non-accrual loans
Non-accrual loans	469	0
Consumer:
Non-accrual loans
Non-accrual loans	160	198
Consumer: | Business Activities Loans
Non-accrual loans
Non-accrual loans	157	198
Consumer: | Acquired Loans
Non-accrual loans
Non-accrual loans	3	0
Consumer: | Home equity
Non-accrual loans
Non-accrual loans	65	90
Consumer: | Home equity | Business Activities Loans
Non-accrual loans
Non-accrual loans	65	90
Consumer: | Home equity | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Consumer: | Other consumer
Non-accrual loans
Non-accrual loans	95	108
Consumer: | Other consumer | Business Activities Loans
Non-accrual loans
Non-accrual loans	92	108
Consumer: | Other consumer | Acquired Loans
Non-accrual loans
Non-accrual loans	$ 3	$ 0