LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Recorded investment in company's loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 1,534,185	$ 996,559
Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,517,908	973,472
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	6,316	1,158
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	9,961	21,929
Cash, Securities and Other
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	357,020	146,701
Cash, Securities and Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	356,970	143,898
Cash, Securities and Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	50	2,803
Construction and Development
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	131,111	28,120
Construction and Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	131,111	28,120
1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	455,038	400,134
1-4 Family Residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	451,918	395,224
1-4 Family Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	3,120	4,910
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	281,943	165,179
Non-Owner Occupied CRE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	275,627	164,021
Non-Owner Occupied CRE | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	6,316	1,158
Owner Occupied CRE
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	163,042	127,968
Owner Occupied CRE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	161,850	127,968
Owner Occupied CRE | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,192
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	146,031	128,457
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	140,432	114,241
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 5,599	$ 14,216