LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Loan Portfolio, Excluding Residential Loans Held for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 1,644,330	$ 1,247,657
Acquired loans	395,900	135,000
Commercial Real Estate | Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	170,884	129,650
Commercial Real Estate | Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	361,050	252,794
Commercial Real Estate | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	106,893	78,933
Commercial Real Estate | Non-owner occupied residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	120,038	100,367
Acquisition and development | 1-4 family residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	15,865	7,385
Acquisition and development | Commercial and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	41,538	42,051
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	214,554	160,964
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	47,057	50,982
Residential mortgage | First lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	336,372	235,296
Residential mortgage | Home equity – term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	14,030	12,208
Residential mortgage | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	165,314	143,616
Installment and other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 50,735	$ 33,411