LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Payment Status of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	$ 12,550	$ 8,296
Current	1,946,084	1,698,099
Total Loans	1,958,634	1,706,395
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	2,379	4,704
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	923	1,754
Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	9,248	1,838
Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	113	389
Current	531,039	279,194
Total Loans	531,152	279,583
Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	78	321
Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	35	53
Commercial and industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans		15
Construction and development
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	514	161
Current	268,587	280,337
Total Loans	269,101	280,498
Construction and development | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans		161
Construction and development | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	164
Construction and development | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	350
Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	9,671	2,112
Current	592,993	565,248
Total Loans	602,664	567,360
Commercial real estate | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	448	1,181
Commercial real estate | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	525	49
Commercial real estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	8,698	882
Farmland
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	3	103
Current	80,194	57,373
Total Loans	80,197	57,476
Farmland | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	3	103
1-4 family residential
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	1,746	4,792
Current	384,037	407,374
Total Loans	385,783	412,166
1-4 family residential | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	1,481	2,514
1-4 family residential | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	88	1,433
1-4 family residential | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	177	845
Multi-family residential
Financing Receivable Recorded Investment Past Due [Line Items]
Current	19,499	37,379
Total Loans	19,499	37,379
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	390	621
Current	52,465	52,624
Total Loans	52,855	53,245
Consumer | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	274	373
Consumer | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	93	152
Consumer | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	23	96
Agricultural
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	113	118
Current	16,891	18,241
Total Loans	17,004	18,359
Agricultural | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	95	51
Agricultural | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due loans	18	67
Overdrafts
Financing Receivable Recorded Investment Past Due [Line Items]
Current	379	329
Total Loans	$ 379	$ 329