LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Aging analysis of recorded investments by class (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 11,399	$ 10,230
Total current	1,496,085	986,329
Total Recorded Investment	1,507,484	996,559
90 days past due and accruing interest	0	0
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6,457	6,213
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,197	3,110
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,745	907
Cash, Securities and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	96	525
Total current	371,385	146,176
Total Recorded Investment	371,481	146,701
Cash, Securities and Other | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	30	525
Cash, Securities and Other | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	66
Construction and Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	105,717	28,120
Total Recorded Investment	105,717	28,120
1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6,080	5,688
Total current	440,879	394,446
Total Recorded Investment	446,959	400,134
1-4 Family Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,883	5,688
1-4 Family Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,197
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,022
Total current	242,542	165,179
Total Recorded Investment	243,564	165,179
Non-Owner Occupied CRE | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,022
Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	154,138	127,968
Total Recorded Investment	154,138	127,968
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,201	4,017
Total current	181,424	124,440
Total Recorded Investment	185,625	128,457
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	522
Commercial and Industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,110
Commercial and Industrial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 3,679	$ 907