LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Recorded investment in company's loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 1,424,160	$ 996,559
Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,399,317	973,472
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	5,740	1,158
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	19,103	21,929
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Cash, Securities and Other
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	371,111	146,701
Cash, Securities and Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	369,618	143,898
Cash, Securities and Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,493	2,803
Construction and Development
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	74,793	28,120
Construction and Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	74,793	28,120
1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	418,409	400,134
1-4 Family Residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	413,514	395,224
1-4 Family Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	4,895	4,910
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	229,150	165,179
Non-Owner Occupied CRE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	223,903	164,021
Non-Owner Occupied CRE | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	5,247	1,158
Owner Occupied CRE
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	117,426	127,968
Owner Occupied CRE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	116,933	127,968
Owner Occupied CRE | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	493
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	213,271	128,457
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	200,556	114,241
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 12,715	$ 14,216