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LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Allowance for Loan Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Allowance for loan losses:
Beginning balance			$ 12,859	$ 11,484	$ 11,484
Provision for loan losses	$ 500	$ 800	1,750	2,250	2,850
Loans charged-off			(411)	(1,479)	(2,458)
Recoveries			243	273	983
Ending balance	14,441	12,528	14,441	12,528	12,859
Allowance ending balance:
Individually evaluated for impairment						$ 454	$ 134	$ 520
Collectively evaluated for impairment						13,987	12,725	12,008
Ending balance	14,441	12,528	12,859	11,484	11,484	14,441	12,859	12,528
Loans:
Individually evaluated for impairment						11,826	6,340	6,680
Collectively evaluated for impairment						1,640,037	1,353,204	1,300,695
Ending balance						1,651,863	1,359,544	1,307,375
Commercial and industrial
Allowance for loan losses:
Beginning balance			1,581	1,592	1,592
Provision for loan losses			138	602	272
Loans charged-off			(66)	(737)	(1,080)
Recoveries			54	116	797
Ending balance	1,707	1,573	1,707	1,573	1,581
Allowance ending balance:
Individually evaluated for impairment						315	17	19
Collectively evaluated for impairment						1,392	1,564	1,554
Ending balance	1,707	1,573	1,581	1,592	1,592	1,707	1,581	1,573
Loans:
Individually evaluated for impairment						1,584	463	354
Collectively evaluated for impairment						247,174	197,045	192,309
Ending balance						248,758	197,508	192,663
Construction and development
Allowance for loan losses:
Beginning balance			1,724	1,161	1,161
Provision for loan losses			119	762	563
Loans charged-off			0	0	0
Recoveries			0	0	0
Ending balance	1,843	1,923	1,843	1,923	1,724
Allowance ending balance:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						1,843	1,724	1,923
Ending balance	1,843	1,923	1,724	1,161	1,161	1,843	1,724	1,923
Loans:
Individually evaluated for impairment						1,684	0	0
Collectively evaluated for impairment						227,623	196,774	201,067
Ending balance						229,307	196,774	201,067
Commercial real estate
Allowance for loan losses:
Beginning balance			4,585	3,264	3,264
Provision for loan losses			1,329	1,019	1,405
Loans charged-off			(32)	(84)	(84)
Recoveries			0	0	0
Ending balance	5,882	4,199	5,882	4,199	4,585
Allowance ending balance:
Individually evaluated for impairment						61	27	31
Collectively evaluated for impairment						5,821	4,558	4,168
Ending balance	5,882	4,199	4,585	3,264	3,264	5,882	4,585	4,199
Loans:
Individually evaluated for impairment						6,360	4,258	4,029
Collectively evaluated for impairment						592,793	413,879	389,285
Ending balance						599,153	418,137	393,314
Farmland
Allowance for loan losses:
Beginning balance			523	482	482
Provision for loan losses			100	(24)	41
Loans charged-off			0	0	0
Recoveries			0	0	0
Ending balance	623	458	623	458	523
Allowance ending balance:
Individually evaluated for impairment						74	85	85
Collectively evaluated for impairment						549	438	373
Ending balance	623	458	523	482	482	623	523	458
Loans:
Individually evaluated for impairment						218	163	276
Collectively evaluated for impairment						64,991	58,860	54,073
Ending balance						65,209	59,023	54,349
1-4 family residential
Allowance for loan losses:
Beginning balance			3,022	3,960	3,960
Provision for loan losses			(161)	(585)	(418)
Loans charged-off			(19)	(307)	(543)
Recoveries			49	21	23
Ending balance	2,891	3,089	2,891	3,089	3,022
Allowance ending balance:
Individually evaluated for impairment						4	5	145
Collectively evaluated for impairment						2,887	3,017	2,944
Ending balance	2,891	3,089	3,022	3,960	3,960	2,891	3,022	3,089
Loans:
Individually evaluated for impairment						1,571	842	1,097
Collectively evaluated for impairment						390,885	373,529	364,792
Ending balance						392,456	374,371	365,889
Multi-family residential
Allowance for loan losses:
Beginning balance			629	281	281
Provision for loan losses			41	(15)	348
Loans charged-off			0	0	0
Recoveries			0	0	0
Ending balance	670	266	670	266	629
Allowance ending balance:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						670	629	266
Ending balance	670	266	629	281	281	670	629	266
Loans:
Individually evaluated for impairment						0	217	228
Collectively evaluated for impairment						38,523	36,357	23,007
Ending balance						38,523	36,574	23,235
Consumer
Allowance for loan losses:
Beginning balance			602	585	585
Provision for loan losses			101	149	253
Loans charged-off			(175)	(230)	(344)
Recoveries			41	95	108
Ending balance	569	599	569	599	602
Allowance ending balance:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						569	602	599
Ending balance	569	599	602	585	585	569	602	599
Loans:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						53,947	51,267	51,711
Ending balance						53,947	51,267	51,711
Agricultural
Allowance for loan losses:
Beginning balance			187	153	153
Provision for loan losses			(3)	258	276
Loans charged-off			(2)	(4)	(242)
Recoveries			65	0	0
Ending balance	247	407	247	407	187
Allowance ending balance:
Individually evaluated for impairment						0	0	240
Collectively evaluated for impairment						247	187	167
Ending balance	247	407	187	153	153	247	187	407
Loans:
Individually evaluated for impairment						409	397	696
Collectively evaluated for impairment						23,775	25,199	23,753
Ending balance						24,184	25,596	24,449
Overdrafts
Allowance for loan losses:
Beginning balance			6	6	6
Provision for loan losses			86	84	110
Loans charged-off			(117)	(117)	(165)
Recoveries			34	41	55
Ending balance	9	14	9	14	6
Allowance ending balance:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						9	6	14
Ending balance	$ 9	$ 14	$ 6	$ 6	$ 6	9	6	14
Loans:
Individually evaluated for impairment						0	0	0
Collectively evaluated for impairment						326	294	698
Ending balance						$ 326	$ 294	$ 698

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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