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LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		$ 994,892
Past Due	$ 1,592	5,277
90 (still accruing)		0
Non- Accrual		9,843
Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,958
Past Due	802
90 (still accruing)	57
Non- Accrual	0
Total Loans	11,760
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		4,132
Financing Receivables, 30 to 59 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	631
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		1,145
Financing Receivables, 60 to 89 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	114
Commercial Real Estate | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	125,887	115,605
Past Due	66	21
90 (still accruing)	0	0
Non- Accrual	1,841	1,185
Total Loans	127,794
Commercial Real Estate | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,784
Past Due	72
90 (still accruing)	0
Non- Accrual	0
Total Loans	1,856
Commercial Real Estate | Non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	252,144	240,426
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	0	4,065
Total Loans	252,144
Commercial Real Estate | Non-owner occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	650
Past Due	0
90 (still accruing)	0
Non- Accrual	0
Total Loans	650
Commercial Real Estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	78,085	53,469
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	131	165
Total Loans	78,216
Commercial Real Estate | Multi-family | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	717
Past Due	0
90 (still accruing)	0
Non- Accrual	0
Total Loans	717
Commercial Real Estate | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	99,803	77,454
Past Due	255	145
90 (still accruing)	0	0
Non- Accrual	309	381
Total Loans	100,367
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	66	4
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
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Non-owner occupied
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 | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	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
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	226	145
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	17
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	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
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
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	29	0
Acquisition and development | 1-4 family residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	7,385	11,238
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	0	492
Total Loans	7,385
Acquisition and development | Commercial and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	41,822	19,226
Past Due	37	25
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	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	0	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	37	25
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	154,988	115,312
Past Due	516	1
90 (still accruing)	0	0
Non- Accrual	286	350
Total Loans	155,790
Commercial and industrial | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,943
Past Due	231
90 (still accruing)	0
Non- Accrual	0
Total Loans	5,174
Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	411	1
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	231
Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	105	0
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
Municipal
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	50,982	42,065
Past Due	0	0
90 (still accruing)	0	0
Non- Accrual	0	0
Total Loans	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	228,179	155,387
Past Due	2,326	4,388
90 (still accruing)	0	0
Non- Accrual	1,808	2,734
Total Loans	232,313
Residential mortgage | First lien | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,506
Past Due	477
90 (still accruing)	53
Non- Accrual	0
Total Loans	2,983
Residential mortgage | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,487	11,753
Past Due	683	9
90 (still accruing)	0	0
Non- Accrual	16	22
Total Loans	12,186
Residential mortgage | Home equity – term | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	17
Past Due	5
90 (still accruing)	0
Non- Accrual	0
Total Loans	22
Residential mortgage | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	142,394	131,208
Past Due	448	546
90 (still accruing)	0	0
Non- Accrual	774	438
Total Loans	143,616
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | First lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,592	3,333
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	382
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	678	9
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	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	420	474
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | First lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	734	1,055
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	42
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | Home equity – term
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5	0
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
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	28	72
Installment and other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	33,135	21,749
Past Due	110	142
90 (still accruing)	0	0
Non- Accrual	0	11
Total Loans	33,245
Installment and other loans | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	149
Past Due	17
90 (still accruing)	4
Non- Accrual	0
Total Loans	166
Installment and other loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	66	141
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	13
Installment and other loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	44	$ 1
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
Loans Excluding Acquired PCI
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,226,291
Past Due	4,441
90 (still accruing)	0
Non- Accrual	5,165
Total Loans	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	3,496
Loans Excluding Acquired PCI | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	945
Total Portfolio Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,237,249
Past Due	5,243
90 (still accruing)	57
Non- Accrual	5,165
Total Loans	1,247,657
Total Portfolio Loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,127
Total Portfolio Loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 1,059

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