LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Payment Status of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 8,031	$ 11,700
Current Loans	1,288,812	1,233,435
Ending balance	1,296,843	1,245,135	$ 1,185,161
Recorded Investment 90 Days and Accruing	0	0
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	5,107	7,346
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,063	1,220
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,861	3,134
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	761	1,071
Current Loans	216,736	222,926
Ending balance	217,497	223,997	218,397
Recorded Investment 90 Days and Accruing	0	0
Commercial and industrial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	168	941
Commercial and industrial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	142	105
Commercial and industrial | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	451	25
Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	135	1,898
Current Loans	177,465	127,468
Ending balance	177,600	129,366	108,698
Recorded Investment 90 Days and Accruing	0	0
Construction and development | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	135	73
Construction and development | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	0
Construction and development | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	1,825
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	693	1,795
Current Loans	378,029	365,861
Ending balance	378,722	367,656	347,432
Recorded Investment 90 Days and Accruing	0	0
Commercial real estate | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	677	1,629
Commercial real estate | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	16	32
Commercial real estate | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	134
Farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	267	133
Current Loans	63,572	62,229
Ending balance	63,839	62,362	66,174
Recorded Investment 90 Days and Accruing	0	0
Farmland | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	145	100
Farmland | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	122	26
Farmland | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	7
1-4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	4,843	5,568
Current Loans	351,614	357,384
Ending balance	356,457	362,952	334,569
Recorded Investment 90 Days and Accruing	0	0
1-4 family residential | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,107	3,724
1-4 family residential | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	644	803
1-4 family residential | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,092	1,041
Multi-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	192	256
Current Loans	28,641	25,823
Ending balance	28,833	26,079	36,860
Recorded Investment 90 Days and Accruing	0	0
Multi-family residential | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	207
Multi-family residential | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	49
Multi-family residential | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	192	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	796	905
Current Loans	50,881	52,600
Ending balance	51,677	53,505	53,027
Recorded Investment 90 Days and Accruing	0	0
Consumer | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	531	613
Consumer | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	139	205
Consumer | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	126	87
Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	344	74
Current Loans	21,510	18,827
Ending balance	21,854	18,901	19,444
Recorded Investment 90 Days and Accruing	0	0
Agricultural | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	344	59
Agricultural | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	0
Agricultural | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	15
Overdrafts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	0
Current Loans	364	317
Ending balance	364	317	$ 560
Recorded Investment 90 Days and Accruing	0	0
Overdrafts | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	0
Overdrafts | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	0	0
Overdrafts | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 0	$ 0