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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Credit Exposure (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | $ 1,651,863 | $ 1,359,544 | $ 1,307,375
Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,633,511 | 1,329,802 |
Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 7,729 | 23,213 |
Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 10,623 | 6,529 |
Commercial and industrial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 248,758 | 197,508 | 192,663
Commercial and industrial | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 246,621 | 196,890 |
Commercial and industrial | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 807 | 348 |
Commercial and industrial | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,330 | 270 |
Construction and development |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 229,307 | 196,774 | 201,067
Construction and development | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 227,862 | 196,515 |
Construction and development | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 259 |
Construction and development | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,445 | 0 |
Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 599,153 | 418,137 | 393,314
Commercial real estate | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 587,603 | 412,488 |
Commercial real estate | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 5,165 | 1,135 |
Commercial real estate | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 6,385 | 4,514 |
Farmland |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 65,209 | 59,023 | 54,349
Farmland | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 64,797 | 58,623 |
Farmland | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 50 | 226 |
Farmland | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 362 | 174 |
1-4 family residential |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 392,456 | 374,371 | 365,889
1-4 family residential | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 391,556 | 373,154 |
1-4 family residential | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 293 | 442 |
1-4 family residential | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 607 | 775 |
Multi-family residential |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 38,523 | 36,574 | 23,235
Multi-family residential | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 37,284 | 16,073 |
Multi-family residential | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,239 | 20,284 |
Multi-family residential | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 217 |
Consumer and Overdrafts |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 54,273 | 51,561 |
Consumer and Overdrafts | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 54,183 | 51,409 |
Consumer and Overdrafts | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 45 | 65 |
Consumer and Overdrafts | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 45 | 87 |
Agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 24,184 | 25,596 | $ 24,449
Agricultural | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 23,605 | 24,650 |
Agricultural | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 130 | 454 |
Agricultural | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | $ 449 | $ 492 |

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