LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Credit Exposure (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 1,957,440	$ 1,706,395
Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		1,682,413
Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		3,658
Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		20,324
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Total loans	522,248	279,583
Commercial and industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		279,217
Commercial and industrial | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		153
Commercial and industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		213
Construction and development
Financing Receivable Recorded Investment [Line Items]
Total loans	265,982	280,498
Construction and development | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		278,679
Construction and development | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		600
Construction and development | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		1,219
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	606,061	567,360
Commercial real estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		548,662
Commercial real estate | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		1,071
Commercial real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		17,627
Farmland
Financing Receivable Recorded Investment [Line Items]
Total loans	77,625	57,476
Farmland | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		57,152
Farmland | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		91
Farmland | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		233
1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Total loans	383,590	412,166
1-4 family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		409,896
1-4 family residential | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		1,425
1-4 family residential | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		845
Multi-family residential
Financing Receivable Recorded Investment [Line Items]
Total loans	29,692	37,379
Multi-family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		37,379
Consumer and Overdrafts
Financing Receivable Recorded Investment [Line Items]
Total loans		53,574
Consumer and Overdrafts | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		53,327
Consumer and Overdrafts | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		192
Consumer and Overdrafts | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		55
Agricultural
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 18,981	18,359
Agricultural | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans		18,101
Agricultural | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		126
Agricultural | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans		$ 132