LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 12,903	$ 12,232
Loans Past Due 90 Days or More and Still Accruing	12	18
Aging of the recorded investment in loans past due [Abstract]
Past Due	18,621	18,479
Loans Not Past Due	1,199,019	1,150,929
Total ending loans balance	1,219,478	1,171,503
30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	4,601	9,793
60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	7,076	1,012
90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	6,944	7,674
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,838	2,095
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	1,838	2,095
Commercial and Agricultural [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	184,348	193,700
Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Commercial Mortgages [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	577,118	507,700
Commercial Mortgages [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	1,743	1,825
Commercial Mortgages [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	20	63
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Loans Not Past Due	35,134	41,231
Total ending loans balance	35,134	41,231
Commercial Mortgages [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Commercial Mortgages [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Commercial Mortgages [Member] | Construction [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Commercial Mortgages [Member] | Construction [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Commercial Mortgages [Member] | Commercial Mortgages Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	6,577	7,203
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	9,677	9,635
Loans Not Past Due	530,564	455,009
Total ending loans balance	541,984	466,469
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	848	4,197
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	5,513	199
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	3,316	5,239
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,743	1,825
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	1,743	1,825
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	4,225	3,610
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	4,785	5,411
Loans Not Past Due	193,262	190,555
Total ending loans balance	198,142	196,236
Residential Mortgages [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	1,697	2,983
Residential Mortgages [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	928	725
Residential Mortgages [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	2,160	1,703
Residential Mortgages [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	95	270
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	95	270
Consumer Loans [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	259,870	273,867
Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Consumer Loans [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Loans Past Due 90 Days or More and Still Accruing	11	15
Aging of the recorded investment in loans past due [Abstract]
Past Due	28	49
Loans Not Past Due	1,324	1,433
Total ending loans balance	1,352	1,482
Consumer Loans [Member] | Credit Cards [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	11	30
Consumer Loans [Member] | Credit Cards [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	6	4
Consumer Loans [Member] | Credit Cards [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	11	15
Consumer Loans [Member] | Credit Cards [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Consumer Loans [Member] | Home Equity Lines and Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,653	758
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	1,636	549
Loans Not Past Due	96,993	101,428
Total ending loans balance	98,629	101,977
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	272	233
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	190	77
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	1,174	239
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Consumer Loans [Member] | Indirect Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	298	542
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	2,251	2,195
Loans Not Past Due	139,566	149,531
Total ending loans balance	141,817	151,726
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	1,651	1,744
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	416	4
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	184	447
Consumer Loans [Member] | Indirect Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Consumer Loans [Member] | Direct Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	120	43
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	210	227
Loans Not Past Due	17,862	18,455
Total ending loans balance	18,072	18,682
Consumer Loans [Member] | Direct Consumer Loans [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	90	208
Consumer Loans [Member] | Direct Consumer Loans [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	22	0
Consumer Loans [Member] | Direct Consumer Loans [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	98	19
Consumer Loans [Member] | Direct Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	10	13
Loans Past Due 90 Days or More and Still Accruing	1	3
Aging of the recorded investment in loans past due [Abstract]
Past Due	34	413
Loans Not Past Due	183,907	192,248
Total ending loans balance	183,941	192,661
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	32	398
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	1	3
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	1	12
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	0	0
Agricultural Sector [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Loans Past Due 90 Days or More and Still Accruing	0	0
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Loans Not Past Due	407	1,039
Total ending loans balance	407	1,039
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 30 to 59 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 60 to 89 Days Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 90 Days or More Past Due [Member]
Aging of the recorded investment in loans past due [Abstract]
Past Due	0	0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	0	0
Aging of the recorded investment in loans past due [Abstract]
Total ending loans balance	$ 0	$ 0