LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Loan Portfolio Ratings Based On Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,644,330	$ 1,247,657
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	1,555,156	1,201,023
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	37,894	22,137
Non-Impaired Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	15,439	6,440
Impaired - Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	11,636	6,297
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	24,205	11,760
Commercial Real Estate | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	170,884	129,650
Commercial Real Estate | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	361,050	252,794
Commercial Real Estate | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	106,893	78,933
Commercial Real Estate | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	120,038	100,367
Commercial Real Estate | Pass | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	151,161	121,903
Commercial Real Estate | Pass | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	342,753	242,136
Commercial Real Estate | Pass | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	100,361	71,482
Commercial Real Estate | Pass | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	111,697	97,590
Commercial Real Estate | Special Mention | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	4,513	3,024
Commercial Real Estate | Special Mention | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	17,152	10,008
Commercial Real Estate | Special Mention | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	4,822	5,886
Commercial Real Estate | Special Mention | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	4,534	736
Commercial Real Estate | Non-Impaired Substandard | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	3,163	987
Commercial Real Estate | Non-Impaired Substandard | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | Non-Impaired Substandard | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	682	717
Commercial Real Estate | Non-Impaired Substandard | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	1,115	1,197
Commercial Real Estate | Impaired - Substandard | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	5,872	1,880
Commercial Real Estate | Impaired - Substandard | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | Impaired - Substandard | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	345	131
Commercial Real Estate | Impaired - Substandard | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	235	309
Commercial Real Estate | Doubtful | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | Doubtful | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | Doubtful | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | Doubtful | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial Real Estate | PCI Loans | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	6,175	1,856
Commercial Real Estate | PCI Loans | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	1,145	650
Commercial Real Estate | PCI Loans | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans	683	717
Commercial Real Estate | PCI Loans | Non-owner occupied residential
Financing Receivable, Recorded Investment [Line Items]
Loans	2,457	535
Acquisition and development | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	15,865	7,385
Acquisition and development | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	41,538	42,051
Acquisition and development | Pass | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	15,865	7,385
Acquisition and development | Pass | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	39,939	41,251
Acquisition and development | Special Mention | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | Special Mention | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	206	25
Acquisition and development | Non-Impaired Substandard | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | Non-Impaired Substandard | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	1,393	583
Acquisition and development | Impaired - Substandard | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | Impaired - Substandard | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | Doubtful | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | Doubtful | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | PCI Loans | 1-4 family residential construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquisition and development | PCI Loans | Commercial and land development
Financing Receivable, Recorded Investment [Line Items]
Loans	0	192
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans	214,554	160,964
Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	198,951	150,286
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	1,133	2,278
Commercial and industrial | Non-Impaired Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	8,899	2,940
Commercial and industrial | Impaired - Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,763	286
Commercial and industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial | PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	3,808	5,174
Municipal
Financing Receivable, Recorded Investment [Line Items]
Loans	47,057	50,982
Municipal | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	42,649	50,982
Municipal | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,408	0
Municipal | Non-Impaired Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Municipal | Impaired - Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Municipal | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Municipal | PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential mortgage | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	336,372	235,296
Residential mortgage | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	14,030	12,208
Residential mortgage | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	165,314	143,616
Residential mortgage | Pass | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	323,040	229,971
Residential mortgage | Pass | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	13,774	12,170
Residential mortgage | Pass | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	164,469	142,638
Residential mortgage | Special Mention | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	978	0
Residential mortgage | Special Mention | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	74	0
Residential mortgage | Special Mention | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	74	165
Residential mortgage | Non-Impaired Substandard | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential mortgage | Non-Impaired Substandard | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	149	0
Residential mortgage | Non-Impaired Substandard | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	38	15
Residential mortgage | Impaired - Substandard | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	2,590	2,877
Residential mortgage | Impaired - Substandard | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	13	16
Residential mortgage | Impaired - Substandard | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	733	798
Residential mortgage | Doubtful | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential mortgage | Doubtful | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential mortgage | Doubtful | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential mortgage | PCI Loans | First lien
Financing Receivable, Recorded Investment [Line Items]
Loans	9,764	2,448
Residential mortgage | PCI Loans | Home equity – term
Financing Receivable, Recorded Investment [Line Items]
Loans	20	22
Residential mortgage | PCI Loans | Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Installment and other loans
Financing Receivable, Recorded Investment [Line Items]
Loans	50,735	33,411
Installment and other loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	50,497	33,229
Installment and other loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	15
Installment and other loans | Non-Impaired Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	1
Installment and other loans | Impaired - Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	85	0
Installment and other loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Installment and other loans | PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 153	$ 166