LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Impairment - (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Loans individually evaluated for impairment and average balance of impaired loans
Performing troubled debt restructurings excluded as allowed	$ 1,954		$ 1,954		$ 2,760
Unpaid Principal Balance
With an allowance recorded	5,922		5,922		4,146
With no related allowance recorded	17,094		17,094		15,230
Total impaired loans	23,016		23,016		19,376
Recorded Investment
With an allowance recorded	5,747		5,747		3,981
With no related allowance recorded	12,711		12,711		12,248
Total impaired loans	18,458		18,458		16,229
Allowance for Loan Losses Allocated
With an allowance recorded	1,252		1,252		1,429
Total impaired loans	1,252		1,252		1,429
Average recorded investment
Average Balance	19,177	$ 18,592	17,300	$ 20,938
Interest Income Recognized
Total impaired loans - interest income recognized	71	107	269	276
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	71	107	269	276
Commercial
Allowance for Loan Losses Allocated
With an allowance recorded	454		454		92
Commercial | Commercial and industrial
Unpaid Principal Balance
With an allowance recorded	371		371		150
With no related allowance recorded	1,078		1,078		676
Recorded Investment
With an allowance recorded	344		344		150
With no related allowance recorded	352		352		655
Allowance for Loan Losses Allocated
With an allowance recorded	85		85		92
Average recorded investment
Average Balance	725	1,677	753	1,256
Interest Income Recognized
Total impaired loans - interest income recognized	12	6	43	12
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	12	6	43	12
Commercial | Agricultural
Unpaid Principal Balance
With an allowance recorded	1,450		1,450
With no related allowance recorded	183		183		7
Recorded Investment
With an allowance recorded	1,450		1,450
With no related allowance recorded	183		183		7
Allowance for Loan Losses Allocated
With an allowance recorded	369		369
Average recorded investment
Average Balance	1,640		824	38
Commercial | Farm
Unpaid Principal Balance
With an allowance recorded	1,106		1,106
With no related allowance recorded	501		501
Recorded Investment
With an allowance recorded	1,105		1,105
With no related allowance recorded	246		246
Allowance for Loan Losses Allocated
With an allowance recorded	282		282
Commercial | Hotel
Unpaid Principal Balance
With no related allowance recorded	64		64
Recorded Investment
With no related allowance recorded	64		64
Commercial | Construction and development
Unpaid Principal Balance
With no related allowance recorded	158		158
Recorded Investment
With no related allowance recorded	84		84
Commercial | Other
Unpaid Principal Balance
With an allowance recorded	1,788		1,788
With no related allowance recorded	3,872		3,872
Recorded Investment
With an allowance recorded	1,682		1,682
With no related allowance recorded	2,736		2,736
Allowance for Loan Losses Allocated
With an allowance recorded	368		368
Commercial Real Estate
Allowance for Loan Losses Allocated
With an allowance recorded	650		650		1,166
Commercial Real Estate | Farm
Unpaid Principal Balance
With no related allowance recorded					496
Recorded Investment
With no related allowance recorded					309
Average recorded investment
Average Balance	1,357	405	830	424
Interest Income Recognized
Total impaired loans - interest income recognized				4
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized				4
Commercial Real Estate | Hotel
Average recorded investment
Average Balance	32		16	3,563
Commercial Real Estate | Construction and development
Unpaid Principal Balance
With no related allowance recorded					189
Recorded Investment
With no related allowance recorded					186
Average recorded investment
Average Balance	124		155	20
Interest Income Recognized
Total impaired loans - interest income recognized				47
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized				47
Commercial Real Estate | Other
Unpaid Principal Balance
With an allowance recorded					2,480
With no related allowance recorded					4,429
Recorded Investment
With an allowance recorded					2,363
With no related allowance recorded					3,291
Allowance for Loan Losses Allocated
With an allowance recorded					1,166
Average recorded investment
Average Balance	4,791	6,298	4,898	5,753
Interest Income Recognized
Total impaired loans - interest income recognized	35	86	152	141
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	35	86	152	141
Residential
Allowance for Loan Losses Allocated
With an allowance recorded	148		148		171
Residential | 1-4 family
Unpaid Principal Balance
With an allowance recorded	1,100		1,100		1,357
With no related allowance recorded	8,984		8,984		6,718
Recorded Investment
With an allowance recorded	1,059		1,059		1,309
With no related allowance recorded	7,040		7,040		5,391
Allowance for Loan Losses Allocated
With an allowance recorded	147		147		167
Average recorded investment
Average Balance	8,299	7,343	7,433	7,527
Interest Income Recognized
Total impaired loans - interest income recognized	17	8	44	43
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	17	8	44	43
Residential | Home equity
Unpaid Principal Balance
With an allowance recorded	107		107		159
With no related allowance recorded	2,127		2,127		2,589
Recorded Investment
With an allowance recorded	107		107		159
With no related allowance recorded	1,886		1,886		2,296
Allowance for Loan Losses Allocated
With an allowance recorded	1		1		4
Average recorded investment
Average Balance	2,083	2,707	2,270	2,221
Interest Income Recognized
Total impaired loans - interest income recognized	4	2	20	10
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	4	2	20	10
Residential | Direct
Unpaid Principal Balance
With no related allowance recorded	127		127
Recorded Investment
With no related allowance recorded	120		120
Consumer | Direct
Unpaid Principal Balance
With no related allowance recorded					126
Recorded Investment
With no related allowance recorded					$ 113
Average recorded investment
Average Balance	126	162	121	134
Interest Income Recognized
Total impaired loans - interest income recognized	3	4	9	14
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized	$ 3	4	9	14
Consumer | Indirect
Average recorded investment
Average Balance				2
Interest Income Recognized
Total impaired loans - interest income recognized		1	1	5
Cash Basis Income Recognized
Total impaired loans - cash basis income recognized		$ 1	$ 1	$ 5