LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio Summarized by Aging Categories of Performing Loans and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 12,175	$ 19,219
Past Due	5,299	4,986
90+ (still accruing) Days Past Due	1,908	2,013
Non-Accrual	0	0
Total Loans	17,474	24,205
30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,374	1,988
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		2,601
60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	985
Commercial real estate \| Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	156,194	158,723
Past Due	4,065	144
90+ (still accruing) Days Past Due	0	0
Non-Accrual	3,458	5,842
Total Loans	163,717	164,709
Commercial real estate \| Owner occupied \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,199	6,015
Past Due	1,670	160
90+ (still accruing) Days Past Due	125	31
Non-Accrual	0	0
Total Loans	4,869	6,175
Commercial real estate \| Owner occupied \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,065	144
Commercial real estate \| Owner occupied \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,545	0
Commercial real estate \| Owner occupied \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate \| Owner occupied \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	129
Commercial real estate \| Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	377,025	359,425
Past Due	0	480
90+ (still accruing) Days Past Due	0	0
Non-Accrual	0	0
Total Loans	377,025	359,905
Commercial real estate \| Non-owner occupied \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	338	564
Past Due	570	581
90+ (still accruing) Days Past Due	570	581
Non-Accrual	0	0
Total Loans	908	1,145
Commercial real estate \| Non-owner occupied \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	480
Commercial real estate \| Non-owner occupied \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate \| Non-owner occupied \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate \| Non-owner occupied \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate \| Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	107,180	105,865
Past Due	281	0
90+ (still accruing) Days Past Due	0	0
Non-Accrual	336	345
Total Loans	107,797	106,210
Commercial real estate \| Multi-family \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		683
Past Due		0
90+ (still accruing) Days Past Due		0
Non-Accrual		0
Total Loans		683
Commercial real estate \| Multi-family \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	281	0
Commercial real estate \| Multi-family \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Commercial real estate \| Multi-family \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate \| Multi-family \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Commercial real estate \| Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	116,222	116,370
Past Due	634	976
90+ (still accruing) Days Past Due	0	69
Non-Accrual	340	235
Total Loans	117,196	117,581
Commercial real estate \| Non-owner occupied residential \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,296	1,710
Past Due	281	747
90+ (still accruing) Days Past Due	280	531
Non-Accrual	0	0
Total Loans	1,577	2,457
Commercial real estate \| Non-owner occupied residential \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	634	841
Commercial real estate \| Non-owner occupied residential \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	105
Commercial real estate \| Non-owner occupied residential \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	66
Commercial real estate \| Non-owner occupied residential \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	111
Acquisition and development \| 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	12,780	15,587
Past Due	257	278
90+ (still accruing) Days Past Due	0	0
Non-Accrual	0	0
Total Loans	13,037	15,865
Acquisition and development \| 1-4 family residential construction \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	257	278
Acquisition and development \| 1-4 family residential construction \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Acquisition and development \| Commercial and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	48,495	40,403
Past Due	16	1,135
90+ (still accruing) Days Past Due	0	0
Non-Accrual	837	0
Total Loans	49,348	41,538
Acquisition and development \| Commercial and land development \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	16	1,135
Acquisition and development \| Commercial and land development \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	230,859	208,668
Past Due	368	315
90+ (still accruing) Days Past Due	1	0
Non-Accrual	840	1,763
Total Loans	232,067	210,746
Commercial and industrial \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,708	3,792
Past Due	16	16
90+ (still accruing) Days Past Due	16	16
Non-Accrual	0	0
Total Loans	3,724	3,808
Commercial and industrial \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	367	315
Commercial and industrial \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial and industrial \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial and industrial \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Municipal
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	46,551	47,057
Past Due	0	0
90+ (still accruing) Days Past Due	0	0
Non-Accrual	0	0
Total Loans	46,551	47,057
Municipal \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Municipal \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential mortgage \| First lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	305,689	314,473
Past Due	11,532	10,476
90+ (still accruing) Days Past Due	206	150
Non-Accrual	1,263	1,659
Total Loans	318,484	326,608
Residential mortgage \| First lien \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,551	6,308
Past Due	2,731	3,456
90+ (still accruing) Days Past Due	917	854
Non-Accrual	0	0
Total Loans	6,282	9,764
Residential mortgage \| First lien \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10,705	9,092
Residential mortgage \| First lien \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,814	1,857
Residential mortgage \| First lien \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	621	1,234
Residential mortgage \| First lien \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	745
Residential mortgage \| Home equity - term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	13,302	13,993
Past Due	3	4
90+ (still accruing) Days Past Due	0	0
Non-Accrual	12	13
Total Loans	13,317	14,010
Residential mortgage \| Home equity - term \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	16	16
Past Due	4	4
90+ (still accruing) Days Past Due	0	0
Non-Accrual	0	0
Total Loans	20	20
Residential mortgage \| Home equity - term \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3	0
Residential mortgage \| Home equity - term \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	4
Residential mortgage \| Home equity - term \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	4
Residential mortgage \| Home equity - term \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential mortgage \| Home equity - lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	164,049	163,907
Past Due	626	692
90+ (still accruing) Days Past Due	0	0
Non-Accrual	700	715
Total Loans	165,375	165,314
Residential mortgage \| Home equity - lines of credit \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	475	417
Residential mortgage \| Home equity - lines of credit \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	151	275
Installment and other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	35,235	50,224
Past Due	305	273
90+ (still accruing) Days Past Due	0	0
Non-Accrual	20	85
Total Loans	35,560	50,582
Installment and other loans \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	67	131
Past Due	27	22
90+ (still accruing) Days Past Due	0	0
Non-Accrual	0	0
Total Loans	94	153
Installment and other loans \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	260	236
Installment and other loans \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10	22
Installment and other loans \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	45	37
Installment and other loans \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	0
Loans Excluding Acquired PCI
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,613,581	1,594,695
Past Due	18,087	14,773
90+ (still accruing) Days Past Due	207	219
Non-Accrual	7,806	10,657
Total Loans	1,639,474	1,620,125
Loans Excluding Acquired PCI \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17,063	12,938
Loans Excluding Acquired PCI \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	817	1,616
Total Portfolio
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,625,756	1,613,914
Past Due	23,386	19,759
90+ (still accruing) Days Past Due	2,115	2,232
Non-Accrual	7,806	10,657
Total Loans	1,656,948	1,644,330
Total Portfolio \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	20,437	$ 14,926
Total Portfolio \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 834

LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio Summarized by Aging Categories of Performing Loans and Nonaccrual Loans (Details) - USD ($)
$ in Thousands