LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Loan Portfolio Excluding Loans Held for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,813,971	$ 1,691,975	$ 1,543,308
Total mortgage loans on real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,398,542	1,338,743
Total mortgage loans on real estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	199,419	197,797	167,232
Total mortgage loans on real estate | 1-4 Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	326,102	321,489	305,512
Total mortgage loans on real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	60,617	60,617
Total mortgage loans on real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	28,845	27,780	25,203
Total mortgage loans on real estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	783,559	731,060	677,556
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	390,085	323,786	276,902
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 25,344	$ 29,446	$ 34,822