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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Payment Status of Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | $ 14,986 | $ 9,343 |
Current | 1,644,549 | 1,350,201 |
Total Loans | 1,659,535 | 1,359,544 | $ 1,243,925
Recorded Investment Greater than 90 Days and Accruing | 0 | 0 |
30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 6,712 | 6,304 |
60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 4,088 | 845 |
90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 4,186 | 2,194 |
Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 968 | 1,383 |
Current | 260,811 | 196,125 |
Total Loans | 261,779 | 197,508 | 223,712
Recorded Investment Greater than 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 | 209 | 1,273 |
Commercial and industrial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 493 | 93 |
Commercial and industrial | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 266 | 17 |
Construction and development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 3,551 | 117 |
Current | 233,952 | 196,657 |
Total Loans | 237,503 | 196,774 | 129,631
Recorded Investment Greater than 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 | 735 | 117 |
Construction and development | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 2,816 | 0 |
Construction and development | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 5,033 | 1,524 |
Current | 577,486 | 416,613 |
Total Loans | 582,519 | 418,137 | 368,077
Recorded Investment Greater than 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 | 1,803 | 192 |
Commercial real estate | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 3 | 265 |
Commercial real estate | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 3,227 | 1,067 |
Farmland |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 485 | 145 |
Current | 67,360 | 58,878 |
Total Loans | 67,845 | 59,023 | 62,366
Recorded Investment Greater than 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 | 485 | 139 |
Farmland | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Farmland | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 6 |
1-4 family residential |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 4,111 | 5,214 |
Current | 388,956 | 369,157 |
Total Loans | 393,067 | 374,371 | 361,665
Recorded Investment Greater than 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 | 2,849 | 3,998 |
1-4 family residential | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 666 | 416 |
1-4 family residential | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 596 | 800 |
Multi-family residential |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 217 |
Current | 38,386 | 36,357 |
Total Loans | 38,386 | 36,574 | 26,079
Recorded Investment Greater than 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 | 0 |
Multi-family residential | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Multi-family residential | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 217 |
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 633 | 537 |
Current | 54,144 | 50,730 |
Total Loans | 54,777 | 51,267 | 53,177
Recorded Investment Greater than 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 | 526 | 381 |
Consumer | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 51 | 69 |
Consumer | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 56 | 87 |
Agricultural |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 205 | 206 |
Current | 23,072 | 25,390 |
Total Loans | 23,277 | 25,596 | 18,901
Recorded Investment Greater than 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 | 105 | 204 |
Agricultural | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 59 | 2 |
Agricultural | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 41 | 0 |
Overdrafts |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Current | 382 | 294 |
Total Loans | 382 | 294 | $ 317
Recorded Investment Greater than 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 |

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