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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, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,958,535	$ 1,613,914
Past Due	10,845	19,759
90+ (still accruing)	554	2,232
Non- Accrual	10,310	10,657
Total Loans	1,979,690	1,644,330
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,947,335	1,594,695
Past Due	9,721	14,773
90+ (still accruing)	98	219
Non- Accrual	10,310	10,657
Total Loans	1,967,366	1,620,125
Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,200	19,219
Past Due	1,124	4,986
90+ (still accruing)	456	2,013
Non- Accrual	0	0
Total Loans	12,324	24,205
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,330	14,926
Financing Receivables, 30 to 59 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,671	12,938
Financing Receivables, 30 to 59 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	659	1,988
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	961	2,601
Financing Receivables, 60 to 89 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	952	1,616
Financing Receivables, 60 to 89 Days Past Due | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9	985
Commercial Real Estate | Owner-occupied | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	168,262	158,723
Past Due	958	144
90+ (still accruing)	0	0
Non- Accrual	3,232	5,842
Total Loans	172,452	164,709
Commercial Real Estate | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,456	6,015
Past Due	0	160
90+ (still accruing)	0	31
Non- Accrual	0	0
Total Loans	2,456	6,175
Commercial Real Estate | Non-owner occupied | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	409,130	359,425
Past Due	108	480
90+ (still accruing)	0	0
Non- Accrual	0	0
Total Loans	409,238	359,905
Commercial Real Estate | Non-owner occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	329	564
Past Due	0	581
90+ (still accruing)	0	581
Non- Accrual	0	0
Total Loans	329	1,145
Commercial Real Estate | Multi-family | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	113,635	105,865
Past Due	0	0
90+ (still accruing)	0	0
Non- Accrual	0	345
Total Loans	113,635	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)		0
Non- Accrual		0
Total Loans		683
Commercial Real Estate | Non-owner occupied residential | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	112,443	116,370
Past Due	484	976
90+ (still accruing)	0	69
Non- Accrual	268	235
Total Loans	113,195	117,581
Commercial Real Estate | Non-owner occupied residential | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,161	1,710
Past Due	149	747
90+ (still accruing)	149	531
Non- Accrual	0	0
Total Loans	1,310	2,457
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due | Owner-occupied | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	958	144
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 | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	108	480
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 | Financial Asset, Other than Financial Asset 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 | 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 | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	484	841
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	0	105
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Owner-occupied | Financial Asset, Other than Financial Asset 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 | Owner-occupied | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	129
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due | Non-owner occupied | Financial Asset, Other than Financial Asset 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 | 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 | Financial Asset, Other than Financial Asset 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 | 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 | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	66
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	0	111
Acquisition and development | 1-4 family residential construction | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,486	15,587
Past Due	0	278
90+ (still accruing)	0	0
Non- Accrual	0	0
Total Loans	9,486	15,865
Acquisition and development | Commercial and land development | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	50,922	40,403
Past Due	90	1,135
90+ (still accruing)	0	0
Non- Accrual	814	0
Total Loans	51,826	41,538
Acquisition and development | Financing Receivables, 30 to 59 Days Past Due | 1-4 family residential construction | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	278
Acquisition and development | Financing Receivables, 30 to 59 Days Past Due | Commercial and land development | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	32	1,135
Acquisition and development | Financing Receivables, 60 to 89 Days Past Due | 1-4 family residential construction | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
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 | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	58	0
Commercial and industrial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	640,573	208,668
Past Due	319	315
90+ (still accruing)	0	0
Non- Accrual	3,639	1,763
Total Loans	644,531	210,746
Commercial and industrial | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,837	3,792
Past Due	0	16
90+ (still accruing)	0	16
Non- Accrual	0	0
Total Loans	2,837	3,808
Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9	315
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	0
Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	310	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	0
Municipal | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19,677	47,057
Past Due	846	0
90+ (still accruing)	0	0
Non- Accrual	0	0
Total Loans	20,523	47,057
Municipal | Financing Receivables, 30 to 59 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	846	0
Municipal | Financing Receivables, 60 to 89 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential mortgage | First lien | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	230,903	314,473
Past Due	6,376	10,476
90+ (still accruing)	83	150
Non- Accrual	1,730	1,659
Total Loans	239,009	326,608
Residential mortgage | First lien | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,341	6,308
Past Due	971	3,456
90+ (still accruing)	307	854
Non- Accrual	0	0
Total Loans	5,312	9,764
Residential mortgage | Home-equity - term | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,099	13,993
Past Due	41	4
90+ (still accruing)	1	0
Non- Accrual	10	13
Total Loans	10,150	14,010
Residential mortgage | Home-equity - term | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19	16
Past Due	0	4
90+ (still accruing)	0	0
Non- Accrual	0	0
Total Loans	19	20
Residential mortgage | Home equity - lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	156,153	163,907
Past Due	268	692
90+ (still accruing)	0	0
Non- Accrual	600	715
Total Loans	157,021	165,314
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | First lien | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,758	9,092
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	655	1,857
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home-equity - term | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	40	0
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	0	4
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due | Home equity - lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	268	417
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | First lien | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	535	1,234
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	9	745
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due | Home-equity - term | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	4
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 | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	275
Installment and other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	26,052	50,224
Past Due	231	273
90+ (still accruing)	14	0
Non- Accrual	17	85
Total Loans	26,300	50,582
Installment and other loans | Loans acquired with credit deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	57	131
Past Due	4	22
90+ (still accruing)	0	0
Non- Accrual	0	0
Total Loans	61	153
Installment and other loans | Financing Receivables, 30 to 59 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	168	236
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	4	22
Installment and other loans | Financing Receivables, 60 to 89 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	49	37
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

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