LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 9,092
Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19,219	$ 10,958
Past Due	4,986	802
90 (still accruing)	2,013	57
Non- Accrual	0	0
Total Loans	24,205	11,760
Financing Receivables, 30 to 59 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,988	631
Financing Receivables, 60 to 89 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	985	114
Commercial Real Estate | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	158,723	125,887
Past Due	144	66
90 (still accruing)	0	0
Non- Accrual	5,842	1,841
Total Loans	164,709	127,794
Commercial Real Estate | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,015	1,784
Past Due	160	72
90 (still accruing)	31	0
Non- Accrual	0	0
Total Loans	6,175	1,856
Commercial Real Estate | Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	359,425	252,144
Past Due	480	0
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	359,905	252,144
Commercial Real Estate | Non-owner occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	564	650
Past Due	581	0
90 (still accruing)	581	0
Non- Accrual	0	0
Total Loans	1,145	650
Commercial Real Estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	105,865	78,085
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	345	131
Total Loans	106,210	78,216
Commercial Real Estate | Multi-family | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	683	717
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	683	717
Commercial Real Estate | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	116,370	99,268
Past Due	976	255
90 (still accruing)	69	0
Non- Accrual	235	309
Total Loans	117,581	99,832
Commercial Real Estate | Non-owner occupied residential | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,710	535
Past Due	747	0
90 (still accruing)	531	0
Non- Accrual	0	0
Total Loans	2,457	535
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	144	66
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	480	0
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Non-owner occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Multi-family | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	841	226
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Non-owner occupied residential | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	105	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	129	72
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Non-owner occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Multi-family | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	66	29
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Non-owner occupied residential | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	111	0
Acquisition and development | 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,587	7,385
Past Due	278	0
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	15,865	7,385
Acquisition and development | Commercial and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	40,403	41,822
Past Due	1,135	37
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	41,538	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)		0
Non- Accrual		0
Total Loans		192
Acquisition and development | Financing Receivables, 30 to 59 Days Past Due | 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	278	0
Acquisition and development | Financing Receivables, 30 to 59 Days Past Due | Commercial and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,135	37
Acquisition and development | Financing Receivables, 30 to 59 Days Past Due | Commercial and land development | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Acquisition and development | Financing Receivables, 60 to 89 Days Past Due | 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Acquisition and development | Financing Receivables, 60 to 89 Days Past Due | Commercial and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Acquisition and development | Financing Receivables, 60 to 89 Days Past Due | Commercial and land development | 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	208,668	154,988
Past Due	315	516
90 (still accruing)	0	0
Non- Accrual	1,763	286
Total Loans	210,746	155,790
Commercial and industrial | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,792	4,943
Past Due	16	231
90 (still accruing)	16	0
Non- Accrual	0	0
Total Loans	3,808	5,174
Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	315	411
Commercial and industrial | Financing Receivables, 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 | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	105
Commercial and industrial | Financing Receivables, 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	47,057	50,982
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	47,057	50,982
Municipal | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Municipal | Financing Receivables, 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	314,473	228,714
Past Due	10,476	2,326
90 (still accruing)	150	0
Non- Accrual	1,659	1,808
Total Loans	326,608	232,848
Residential mortgage | First lien | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,308	1,971
Past Due	3,456	477
90 (still accruing)	854	53
Non- Accrual	0	0
Total Loans	9,764	2,448
Residential mortgage | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	13,993	11,487
Past Due	4	683
90 (still accruing)	0	0
Non- Accrual	13	16
Total Loans	14,010	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)	0	0
Non- Accrual	0	0
Total Loans	20	22
Residential mortgage | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	163,907	142,394
Past Due	692	448
90 (still accruing)	0	0
Non- Accrual	715	774
Total Loans	165,314	143,616
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | First lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,092	1,592
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | First lien | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,857	382
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	678
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home equity – term | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	5
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	417	420
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | First lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,234	734
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | First lien | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	745	42
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	5
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | Home equity – term | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	275	28
Installment and other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	50,224	33,135
Past Due	273	110
90 (still accruing)	0	0
Non- Accrual	85	0
Total Loans	50,582	33,245
Installment and other loans | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	131	149
Past Due	22	17
90 (still accruing)	0	4
Non- Accrual	0	0
Total Loans	153	166
Installment and other loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	236	66
Installment and other loans | Financing Receivables, 30 to 59 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22	13
Installment and other loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	37	44
Installment and other loans | Financing Receivables, 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	1,594,695	1,226,291
Past Due	14,773	4,441
90 (still accruing)	219	0
Non- Accrual	10,657	5,165
Total Loans	1,620,125	1,235,897
Loans Excluding Acquired PCI | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12,938	3,496
Loans Excluding Acquired PCI | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,616	945
Total Portfolio Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,613,914	1,237,249
Past Due	19,759	5,243
90 (still accruing)	2,232	57
Non- Accrual	10,657	5,165
Total Loans	1,644,330	1,247,657
Total Portfolio Loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14,926	4,127
Total Portfolio Loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 2,601	$ 1,059