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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Payment Status of Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | $ 13,042 | $ 9,343 |
Current | 1,580,432 | 1,350,201 |
Ending balance | 1,593,474 | 1,359,544 | $ 1,296,843
Recorded Investment Greater than 90 Days and Accruing | 1,250 | 0 |
30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 5,789 | 6,304 |
60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,289 | 845 |
90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 5,964 | 2,194 |
Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,628 | 1,383 |
Current | 232,768 | 196,125 |
Ending balance | 234,396 | 197,508 | 217,497
Recorded Investment Greater than 90 Days and Accruing | 720 | 0 |
Commercial and industrial | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 509 | 1,273 |
Commercial and industrial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 344 | 93 |
Commercial and industrial | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 775 | 17 |
Construction and development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,261 | 117 |
Current | 210,484 | 196,657 |
Ending balance | 211,745 | 196,774 | 177,600
Recorded Investment Greater than 90 Days and Accruing | 530 | 0 |
Construction and development | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 602 | 117 |
Construction and development | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 129 | 0 |
Construction and development | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 530 | 0 |
Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 5,693 | 1,524 |
Current | 564,755 | 416,613 |
Ending balance | 570,448 | 418,137 | 378,722
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 | 1,978 | 192 |
Commercial real estate | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 265 |
Commercial real estate | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 3,715 | 1,067 |
Farmland |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 84 | 145 |
Current | 68,188 | 58,878 |
Ending balance | 68,272 | 59,023 | 63,839
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 | 84 | 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 | 3,619 | 5,214 |
Current | 389,321 | 369,157 |
Ending balance | 392,940 | 374,371 | 356,457
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 | 2,026 | 3,998 |
1-4 family residential | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 748 | 416 |
1-4 family residential | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 845 | 800 |
Multi-family residential |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 217 |
Current | 39,023 | 36,357 |
Ending balance | 39,023 | 36,574 | 28,833
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 | 426 | 537 |
Current | 52,523 | 50,730 |
Ending balance | 52,949 | 51,267 | 51,677
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 | 338 | 381 |
Consumer | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 68 | 69 |
Consumer | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 20 | 87 |
Agricultural |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 331 | 206 |
Current | 23,031 | 25,390 |
Ending balance | 23,362 | 25,596 | 21,854
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 | 252 | 204 |
Agricultural | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 2 |
Agricultural | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 79 | 0 |
Overdrafts |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Current | 339 | 294 |
Ending balance | 339 | 294 | $ 364
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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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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