LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Aging analysis of recorded investments by class (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 6,362,000	$ 10,230,000
Total current	1,527,823,000	986,329,000
Total Recorded Investment	$ 1,534,185,000	$ 996,559,000
Number of loans, 90 days delinquent and accruing interest	0	0
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 2,785,000	$ 6,213,000
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,110,000
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,577,000	907,000
Cash, Securities and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	800,000	525,000
Total current	356,220,000	146,176,000
Total Recorded Investment	357,020,000	146,701,000
Cash, Securities and Other | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	752,000	525,000
Cash, Securities and Other | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	48,000
Construction and Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	131,111,000	28,120,000
Total Recorded Investment	131,111,000	28,120,000
1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,283,000	5,688,000
Total current	453,755,000	394,446,000
Total Recorded Investment	455,038,000	400,134,000
1-4 Family Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,283,000	5,688,000
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	281,943,000	165,179,000
Total Recorded Investment	281,943,000	165,179,000
Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	479,000
Total current	162,563,000	127,968,000
Total Recorded Investment	163,042,000	127,968,000
Owner Occupied CRE | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	479,000
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,800,000	4,017,000
Total current	142,231,000	124,440,000
Total Recorded Investment	146,031,000	128,457,000
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	271,000
Commercial and Industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,110,000
Commercial and Industrial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 3,529,000	$ 907,000