LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Credit Exposure (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 1,706,395	$ 1,659,535	$ 1,359,544
Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	1,682,413	1,642,415
Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	3,658	6,641
Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	20,324	10,479
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Total loans	279,583	261,779	197,508
Commercial and industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	279,217	260,863
Commercial and industrial | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	153	224
Commercial and industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	213	692
Construction and development
Financing Receivable Recorded Investment [Line Items]
Total loans	280,498	237,503	196,774
Construction and development | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	278,679	236,253
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	1,250
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	567,360	582,519	418,137
Commercial real estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	548,662	569,648
Commercial real estate | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	1,071	5,691
Commercial real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	17,627	7,180
Farmland
Financing Receivable Recorded Investment [Line Items]
Total loans	57,476	67,845	59,023
Farmland | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	57,152	67,541
Farmland | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	91	49
Farmland | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	233	255
1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Total loans	412,166	393,067	374,371
1-4 family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	409,896	391,956
1-4 family residential | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	1,425	514
1-4 family residential | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	845	597
Multi-family residential
Financing Receivable Recorded Investment [Line Items]
Total loans	37,379	38,386	36,574
Multi-family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	37,379	38,386
Consumer and Overdrafts
Financing Receivable Recorded Investment [Line Items]
Total loans	53,574	55,159
Consumer and Overdrafts | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	53,327	55,055
Consumer and Overdrafts | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	192	48
Consumer and Overdrafts | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	55	56
Agricultural
Financing Receivable Recorded Investment [Line Items]
Total loans	18,359	23,277	$ 25,596
Agricultural | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	18,101	22,713
Agricultural | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	126	115
Agricultural | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 132	$ 449