LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Aging analysis of recorded investments by class (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) D	Dec. 31, 2019 USD ($) D
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 13,432	$ 10,230
Total current	1,410,728	986,329
Total Recorded Investment	$ 1,424,160	$ 996,559
Number of loans, 90 days delinquent and accruing interest | D	90	90
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	7,296	6,213
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,137	3,110
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,999	907
Cash, Securities and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,092	525
Total current	368,019	146,176
Total Recorded Investment	371,111	146,701
Cash, Securities and Other | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,199	525
Cash, Securities and Other | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	400
Cash, Securities and Other | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,493
Construction and Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,567
Total current	72,226	28,120
Total Recorded Investment	74,793	28,120
Construction and Development | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,567
1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,888	5,688
Total current	414,521	394,446
Total Recorded Investment	418,409	400,134
1-4 Family Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,151	5,688
1-4 Family Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	737
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	229,150	165,179
Total Recorded Investment	229,150	165,179
Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	117,426	127,968
Total Recorded Investment	117,426	127,968
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,885	4,017
Total current	209,386	124,440
Total Recorded Investment	213,271	128,457
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	379
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	$ 3,506	$ 907