LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Allowance for Loan Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Allowance for loan losses:
Beginning balance			$ 14,651	$ 12,859	$ 12,859
Provision for loan losses	$ 575	$ 650	1,150	1,250	2,250
Loans charged-off			(165)	(317)	(918)
Recoveries			107	98	460
Ending balance	15,743	13,890	15,743	13,890	14,651
Allowance ending balance:
Individually evaluated for impairment	1,147	345	1,147	345	493
Collectively evaluated for impairment	14,596	13,545	14,596	13,545	14,158
Ending balance	15,743	13,890	15,743	13,890	14,651
Loans:
Individually evaluated for impairment	15,702	9,759	15,702	9,759	11,356
Collectively evaluated for impairment	1,678,145	1,583,715	1,678,145	1,583,715	1,648,179
Ending balance	1,693,847	1,593,474	1,693,847	1,593,474	1,659,535
Commercial and industrial
Allowance for loan losses:
Beginning balance			1,751	1,581	1,581
Provision for loan losses			297	210	426
Loans charged-off			(49)	(51)	(367)
Recoveries			12	2	111
Ending balance	2,011	1,742	2,011	1,742	1,751
Allowance ending balance:
Individually evaluated for impairment		209		209	64
Collectively evaluated for impairment	2,011	1,533	2,011	1,533	1,687
Ending balance	2,011	1,742	2,011	1,742	1,751
Loans:
Individually evaluated for impairment	314	1,076	314	1,076	1,022
Collectively evaluated for impairment	285,876	233,320	285,876	233,320	260,757
Ending balance	286,190	234,396	286,190	234,396	261,779
Construction and development
Allowance for loan losses:
Beginning balance			1,920	1,724	1,724
Provision for loan losses			(45)	(82)	196
Ending balance	1,875	1,642	1,875	1,642	1,920
Allowance ending balance:
Individually evaluated for impairment					4
Collectively evaluated for impairment	1,875	1,642	1,875	1,642	1,916
Ending balance	1,875	1,642	1,875	1,642	1,920
Loans:
Individually evaluated for impairment	1,237		1,237		1,250
Collectively evaluated for impairment	229,930	211,745	229,930	211,745	236,253
Ending balance	231,167	211,745	231,167	211,745	237,503
Commercial real estate
Allowance for loan losses:
Beginning balance			6,025	4,585	4,585
Provision for loan losses			747	1,004	1,472
Loans charged-off				(33)	(33)
Recoveries			1		1
Ending balance	6,773	5,556	6,773	5,556	6,025
Allowance ending balance:
Individually evaluated for impairment	1,073	49	1,073	49	341
Collectively evaluated for impairment	5,700	5,507	5,700	5,507	5,684
Ending balance	6,773	5,556	6,773	5,556	6,025
Loans:
Individually evaluated for impairment	12,029	6,530	12,029	6,530	7,153
Collectively evaluated for impairment	580,916	563,918	580,916	563,918	575,366
Ending balance	592,945	570,448	592,945	570,448	582,519
Farmland
Allowance for loan losses:
Beginning balance			643	523	523
Provision for loan losses			15	125	120
Ending balance	658	648	658	648	643
Allowance ending balance:
Individually evaluated for impairment	62	78	62	78	78
Collectively evaluated for impairment	596	570	596	570	565
Ending balance	658	648	658	648	643
Loans:
Individually evaluated for impairment	133	222	133	222	140
Collectively evaluated for impairment	70,876	68,050	70,876	68,050	67,705
Ending balance	71,009	68,272	71,009	68,272	67,845
1-4 family residential
Allowance for loan losses:
Beginning balance			2,868	3,022	3,022
Provision for loan losses			61	(227)	(196)
Loans charged-off			(6)	(13)	(93)
Recoveries			3	50	135
Ending balance	2,926	2,832	2,926	2,832	2,868
Allowance ending balance:
Individually evaluated for impairment	12	9	12	9	6
Collectively evaluated for impairment	2,914	2,823	2,914	2,823	2,862
Ending balance	2,926	2,832	2,926	2,832	2,868
Loans:
Individually evaluated for impairment	1,757	1,438	1,757	1,438	1,383
Collectively evaluated for impairment	390,032	391,502	390,032	391,502	391,684
Ending balance	391,789	392,940	391,789	392,940	393,067
Multi-family residential
Allowance for loan losses:
Beginning balance			631	629	629
Provision for loan losses			45	69	2
Ending balance	676	698	676	698	631
Allowance ending balance:
Collectively evaluated for impairment	676	698	676	698	631
Ending balance	676	698	676	698	631
Loans:
Collectively evaluated for impairment	44,699	39,023	44,699	39,023	38,386
Ending balance	44,699	39,023	44,699	39,023	38,386
Consumer
Allowance for loan losses:
Beginning balance			565	602	602
Provision for loan losses			(410)	37	127
Loans charged-off			(18)	(143)	(254)
Recoveries			67	26	90
Ending balance	204	522	204	522	565
Allowance ending balance:
Collectively evaluated for impairment	204	522	204	522	565
Ending balance	204	522	204	522	565
Loans:
Collectively evaluated for impairment	56,099	52,949	56,099	52,949	54,777
Ending balance	56,099	52,949	56,099	52,949	54,777
Agricultural
Allowance for loan losses:
Beginning balance			238	187	187
Provision for loan losses			375	52	(12)
Loans charged-off				(1)	(2)
Recoveries					65
Ending balance	613	238	613	238	238
Allowance ending balance:
Collectively evaluated for impairment	613	238	613	238	238
Ending balance	613	238	613	238	238
Loans:
Individually evaluated for impairment	232	493	232	493	408
Collectively evaluated for impairment	19,489	22,869	19,489	22,869	22,869
Ending balance	19,721	23,362	19,721	23,362	23,277
Overdrafts
Allowance for loan losses:
Beginning balance			10	6	6
Provision for loan losses			65	62	115
Loans charged-off			(92)	(76)	(169)
Recoveries			24	20	58
Ending balance	7	12	7	12	10
Allowance ending balance:
Collectively evaluated for impairment	7	12	7	12	10
Ending balance	7	12	7	12	10
Loans:
Collectively evaluated for impairment	228	339	228	339	382
Ending balance	$ 228	$ 339	$ 228	$ 339	$ 382