LOANS, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Allowance for credit losses [Roll Forward]
Beginning balance	$ 11,715	$ 11,499	$ 11,133	$ 10,899	$ 10,899
Provision for loan losses	525	0	1,050	600	600
Charge-offs	(480)	(5)	(486)	(16)	(835)
Recoveries	47	226	110	237	469
Net (charge-offs) recoveries	(433)	221	(376)	221	(366)
Ending balance	11,807	11,720	11,807	11,720	11,133
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	446	1,558	446	1,558	470
Loans collectively evaluated for impairment	11,361	10,162	11,361	10,162	10,663
Ending balance	11,807	11,720	11,807	11,720	11,133
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	7,125	8,920	7,125	8,920	9,001
Loans collectively evaluated for impairment	734,534	676,844	734,534	676,844	740,195
Ending balance	741,659	685,764	741,659	685,764	749,196
Commercial [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	2,549	3,808	2,625	3,571	3,571
Provision for loan losses	654	(869)	569	(634)	(567)
Charge-offs	(475)	0	(475)	0	(681)
Recoveries	36	121	45	123	302
Net (charge-offs) recoveries	(439)	121	(430)	123	(379)
Ending balance	2,764	3,060	2,764	3,060	2,625
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	45	827	45	827	53
Loans collectively evaluated for impairment	2,719	2,233	2,719	2,233	2,572
Ending balance	2,764	3,060	2,764	3,060	2,625
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	2,535	3,541	2,535	3,541	3,660
Loans collectively evaluated for impairment	128,936	119,262	128,936	119,262	131,355
Ending balance	131,471	122,803	131,471	122,803	135,015
Commercial Real Estate [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	5,414	4,723	5,460	3,910	3,910
Provision for loan losses	(30)	160	(76)	973	1,550
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0	0
Ending balance	5,384	4,883	5,384	4,883	5,460
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	35	48	35	48	36
Loans collectively evaluated for impairment	5,349	4,835	5,349	4,835	5,424
Ending balance	5,384	4,883	5,384	4,883	5,460
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	1,922	1,533	1,922	1,533	1,996
Loans collectively evaluated for impairment	390,151	353,527	390,151	353,527	396,350
Ending balance	392,073	355,060	392,073	355,060	398,346
Agriculture [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	1,423	1,287	1,547	1,262	1,262
Provision for loan losses	112	88	(12)	113	285
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0	0
Ending balance	1,535	1,375	1,535	1,375	1,547
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0	0	0	0
Loans collectively evaluated for impairment	1,535	1,375	1,535	1,375	1,547
Ending balance	1,535	1,375	1,535	1,375	1,547
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	0	0	0	0	0
Loans collectively evaluated for impairment	112,457	101,340	112,457	101,340	113,555
Ending balance	112,457	101,340	112,457	101,340	113,555
Residential Mortgage [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	643	701	628	660	660
Provision for loan losses	(28)	(114)	(29)	(73)	(7)
Charge-offs	0	0	0	0	(121)
Recoveries	4	90	20	90	96
Net (charge-offs) recoveries	4	90	20	90	(25)
Ending balance	619	677	619	677	628
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	304	571	304	571	302
Loans collectively evaluated for impairment	315	106	315	106	326
Ending balance	619	677	619	677	628
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	1,585	2,450	1,585	2,450	2,277
Loans collectively evaluated for impairment	44,182	38,897	44,182	38,897	39,804
Ending balance	45,767	41,347	45,767	41,347	42,081
Residential Construction [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	348	454	360	440	440
Provision for loan losses	12	22	(1)	35	(85)
Charge-offs	0	0	0	0	0
Recoveries	1	1	2	2	5
Net (charge-offs) recoveries	1	1	2	2	5
Ending balance	361	477	361	477	360
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	58	87	58	87	76
Loans collectively evaluated for impairment	303	390	303	390	284
Ending balance	361	477	361	477	360
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	637	805	637	805	650
Loans collectively evaluated for impairment	22,057	23,997	22,057	23,997	20,649
Ending balance	22,694	24,802	22,694	24,802	21,299
Consumer [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	305	381	342	498	498
Provision for loan losses	0	(12)	(68)	(126)	(189)
Charge-offs	(5)	(5)	(11)	(16)	(33)
Recoveries	6	14	43	22	66
Net (charge-offs) recoveries	1	9	32	6	33
Ending balance	306	378	306	378	342
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	4	25	4	25	3
Loans collectively evaluated for impairment	302	353	302	353	339
Ending balance	306	378	306	378	342
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	446	591	446	591	418
Loans collectively evaluated for impairment	36,751	39,821	36,751	39,821	38,482
Ending balance	37,197	40,412	37,197	40,412	38,900
Unallocated [Member]
Allowance for credit losses [Roll Forward]
Beginning balance	1,033	145	171	558	558
Provision for loan losses	(195)	725	667	312	(387)
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0	0
Ending balance	838	870	838	870	171
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0	0	0	0
Loans collectively evaluated for impairment	838	870	838	870	171
Ending balance	$ 838	$ 870	$ 838	$ 870	$ 171