LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio Summarized by Aging Categories of Performing Loans and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 21,917	$ 10,958
Past Due	3,128	802
90+ (still accruing) Days Past Due	2,357	57
Non- Accrual	0	0
Total Loans	25,045	11,760
30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	226	631
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		1,059
60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	545	114
Commercial real estate \| Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	161,771	125,887
Past Due	0	66
90+ (still accruing) Days Past Due	0	0
Non- Accrual	3,294	1,841
Total Loans	165,065	127,794
Commercial real estate \| Owner occupied \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,089	1,784
Past Due	173	72
90+ (still accruing) Days Past Due	42	0
Non- Accrual	0	0
Total Loans	6,262	1,856
Commercial real estate \| Owner occupied \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	66
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	131	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	72
Commercial real estate \| Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	308,823	252,144
Past Due	130	0
90+ (still accruing) Days Past Due	130	0
Non- Accrual	0	0
Total Loans	308,953	252,144
Commercial real estate \| Non-owner occupied \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	585	650
Past Due	796	0
90+ (still accruing) Days Past Due	796	0
Non- Accrual	0	0
Total Loans	1,381	650
Commercial real estate \| Non-owner occupied \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
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	107,707	78,085
Past Due	249	0
90+ (still accruing) Days Past Due	249	0
Non- Accrual	105	131
Total Loans	108,061	78,216
Commercial real estate \| Multi-family \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	690	717
Past Due	0	0
90+ (still accruing) Days Past Due	0	0
Non- Accrual	0	0
Total Loans	690	717
Commercial real estate \| Multi-family \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	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	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	0
Commercial real estate \| Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	117,301	99,268
Past Due	332	255
90+ (still accruing) Days Past Due	38	0
Non- Accrual	137	309
Total Loans	117,770	99,832
Commercial real estate \| Non-owner occupied residential \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,025	535
Past Due	600	0
90+ (still accruing) Days Past Due	412	0
Non- Accrual	0	0
Total Loans	2,625	535
Commercial real estate \| Non-owner occupied residential \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	225	226
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	0	0
Commercial real estate \| Non-owner occupied residential \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	69	29
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	188	0
Acquisition and development \| 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	12,257	7,385
Past Due	0	0
90+ (still accruing) Days Past Due	0	0
Non- Accrual	0	0
Total Loans	12,257	7,385
Acquisition and development \| 1-4 family residential construction \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
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	38,358	41,822
Past Due	136	37
90+ (still accruing) Days Past Due	136	0
Non- Accrual	0	0
Total Loans	38,494	41,859
Acquisition and development \| Commercial and land development \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		192
Past Due		0
90+ (still accruing) Days Past Due		0
Non- Accrual		0
Total Loans		192
Acquisition and development \| Commercial and land development \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	37
Acquisition and development \| Commercial and land development \| 30 to 59 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
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
Acquisition and development \| Commercial and land development \| 60 to 89 Days Past Due \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	210,112	154,988
Past Due	653	516
90+ (still accruing) Days Past Due	0	0
Non- Accrual	1,089	286
Total Loans	211,854	155,790
Commercial and industrial \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,863	4,943
Past Due	17	231
90+ (still accruing) Days Past Due	17	0
Non- Accrual	0	0
Total Loans	3,880	5,174
Commercial and industrial \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	320	411
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	231
Commercial and industrial \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	333	105
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	47,920	50,982
Past Due	0	0
90+ (still accruing) Days Past Due	0	0
Non- Accrual	0	0
Total Loans	47,920	50,982
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	339,460	228,714
Past Due	2,864	2,326
90+ (still accruing) Days Past Due	67	0
Non- Accrual	1,555	1,808
Total Loans	343,879	232,848
Residential mortgage \| First lien \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	8,459	1,971
Past Due	1,473	477
90+ (still accruing) Days Past Due	1,042	53
Non- Accrual	0	0
Total Loans	9,932	2,448
Residential mortgage \| First lien \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,101	1,592
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	74	382
Residential mortgage \| First lien \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,696	734
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	357	42
Residential mortgage \| Home equity - term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,122	11,487
Past Due	22	683
90+ (still accruing) Days Past Due	5	0
Non- Accrual	11	16
Total Loans	15,155	12,186
Residential mortgage \| Home equity - term \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	16	17
Past Due	4	5
90+ (still accruing) Days Past Due	0	0
Non- Accrual	0	0
Total Loans	20	22
Residential mortgage \| Home equity - term \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	678
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	5
Residential mortgage \| Home equity - term \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	5
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	158,601	142,394
Past Due	596	448
90+ (still accruing) Days Past Due	0	0
Non- Accrual	733	774
Total Loans	159,930	143,616
Residential mortgage \| Home equity - lines of credit \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	475	420
Residential mortgage \| Home equity - lines of credit \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	121	28
Installment and other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,556	33,135
Past Due	159	110
90+ (still accruing) Days Past Due	0	0
Non- Accrual	7	0
Total Loans	38,722	33,245
Installment and other loans \| Loans Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	190	149
Past Due	65	17
90+ (still accruing) Days Past Due	48	4
Non- Accrual	0	0
Total Loans	255	166
Installment and other loans \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	122	66
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	17	13
Installment and other loans \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	37	44
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	0	0
Loans Excluding Acquired PCI
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,555,988	1,226,291
Past Due	5,141	4,441
90+ (still accruing) Days Past Due	625	0
Non- Accrual	6,931	5,165
Total Loans	1,568,060	1,235,897
Loans Excluding Acquired PCI \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,260	3,496
Loans Excluding Acquired PCI \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,256	945
Total Portfolio
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,577,905	1,237,249
Past Due	8,269	5,243
90+ (still accruing) Days Past Due	2,982	57
Non- Accrual	6,931	5,165
Total Loans	1,593,105	1,247,657
Total Portfolio \| 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,486	$ 4,127
Total Portfolio \| 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 2,801

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