LOANS, ALLOWANCES FOR CREDIT LOSSES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Balance, beginning of year	$ 3,575	$ 3,129	$ 3,121
Provision charged to expenses	215	913	1,366
Losses charged off	(915)	(750)	(1,730)
Recoveries	528	283	372
Balance, end of year	3,403	3,575	3,129
Individually evaluated for impairment				$ 191	$ 177	$ 363
Collectively evaluated for impairment				3,212	3,106	2,766
Acquired credit impaired loans				0	292
Balance, end of year	3,575	3,129	3,121	3,403	3,575	3,129
Loans:
Individually evaluated for impairment				13,167	14,821
Collectively evaluated for impairment				828,411	795,636
Acquired credit impaired loans				7,482	9,346
Total loans				849,060	819,803
Commercial & industrial
Allowance for loan losses:
Balance, beginning of year	350	244	129
Provision charged to expenses	(71)	314	208
Losses charged off	0	(234)	(100)
Recoveries	99	26	7
Balance, end of year	378	350	244
Individually evaluated for impairment				8	9	9
Collectively evaluated for impairment				370	341	235
Acquired credit impaired loans				0	0
Balance, end of year	350	244	129	378	350	244
Loans:
Individually evaluated for impairment				303	337
Collectively evaluated for impairment				34,792	41,466
Total loans				36,103	41,901
Commercial, secured by real estate
Allowance for loan losses:
Balance, beginning of year	2,179	1,908	1,990
Provision charged to expenses	348	358	955
Losses charged off	(462)	(185)	(1,133)
Recoveries	113	98	96
Balance, end of year	2,178	2,179	1,908
Individually evaluated for impairment				146	55	306
Collectively evaluated for impairment				2,032	1,832	1,602
Acquired credit impaired loans				0	292
Balance, end of year	2,179	1,908	1,990	2,178	2,179	1,908
Loans:
Individually evaluated for impairment				11,289	12,580
Collectively evaluated for impairment				512,259	458,059
Total loans				527,596	476,944
Residential real estate
Allowance for loan losses:
Balance, beginning of year	885	854	926
Provision charged to expenses	(83)	106	125
Losses charged off	(225)	(127)	(304)
Recoveries	140	52	107
Balance, end of year	717	885	854
Individually evaluated for impairment				29	100	48
Collectively evaluated for impairment				688	785	806
Acquired credit impaired loans				0	0
Balance, end of year	885	854	926	717	885	854
Loans:
Individually evaluated for impairment				1,351	1,518
Collectively evaluated for impairment				248,674	262,266
Total loans				252,049	266,255
Consumer
Allowance for loan losses:
Balance, beginning of year	96	54	63
Provision charged to expenses	(44)	74	(17)
Losses charged off	(90)	(85)	(52)
Recoveries	114	53	60
Balance, end of year	76	96	54
Individually evaluated for impairment				8	13	0
Collectively evaluated for impairment				68	83	54
Acquired credit impaired loans				0	0
Balance, end of year	96	54	63	76	96	54
Loans:
Individually evaluated for impairment				47	52
Collectively evaluated for impairment				17,516	19,192
Total loans				17,563	19,261
Agricultural
Allowance for loan losses:
Balance, beginning of year	60	66	11
Provision charged to expenses	(7)	(6)	55
Losses charged off	0	0	(67)
Recoveries	0	0	67
Balance, end of year	53	60	66
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				53	60	66
Acquired credit impaired loans				0	0
Balance, end of year	60	66	11	53	60	66
Loans:
Individually evaluated for impairment				177	334
Collectively evaluated for impairment				15,033	14,475
Total loans				15,210	14,809
Other
Allowance for loan losses:
Balance, beginning of year	5	3	2
Provision charged to expenses	72	67	40
Losses charged off	(138)	(119)	(74)
Recoveries	62	54	35
Balance, end of year	1	5	3
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				1	5	3
Acquired credit impaired loans				0	0
Balance, end of year	$ 5	$ 3	$ 2	1	5	3
Loans:
Individually evaluated for impairment				0	0
Collectively evaluated for impairment				137	178
Total loans				539	633
Financial Receivable Acquired Credit Impaired
Loans:
Acquired credit impaired loans				7,482	9,346	$ 0
Financial Receivable Acquired Credit Impaired | Commercial & industrial
Loans:
Acquired credit impaired loans				1,008	98
Financial Receivable Acquired Credit Impaired | Commercial, secured by real estate
Loans:
Acquired credit impaired loans				4,048	6,305
Financial Receivable Acquired Credit Impaired | Residential real estate
Loans:
Acquired credit impaired loans				2,024	2,471
Financial Receivable Acquired Credit Impaired | Consumer
Loans:
Acquired credit impaired loans				0	17
Financial Receivable Acquired Credit Impaired | Agricultural
Loans:
Acquired credit impaired loans				0	0
Financial Receivable Acquired Credit Impaired | Other
Loans:
Acquired credit impaired loans				$ 402	$ 455