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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Payment Status of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | $ 8,623 | $ 11,700 |
Current | 1,298,752 | 1,233,435 |
Ending balance | 1,307,375 | 1,245,135 | $ 1,229,341
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 | 3,709 | 7,346 |
60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,137 | 1,220 |
90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 3,777 | 3,134 |
Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 336 | 1,071 |
Current | 192,327 | 222,926 |
Ending balance | 192,663 | 223,997 | 224,617
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 | 246 | 941 |
Commercial and industrial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 60 | 105 |
Commercial and industrial | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 30 | 25 |
Construction and development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 77 | 1,898 |
Current | 200,990 | 127,468 |
Ending balance | 201,067 | 129,366 | 125,045
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 | 77 | 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 | 1,559 | 1,795 |
Current | 391,755 | 365,861 |
Ending balance | 393,314 | 367,656 | 360,676
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 | 0 | 1,629 |
Commercial real estate | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 38 | 32 |
Commercial real estate | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,521 | 134 |
Farmland |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 8 | 133 |
Current | 54,341 | 62,229 |
Ending balance | 54,349 | 62,362 | 61,902
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 | 2 | 100 |
Farmland | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 26 |
Farmland | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 6 | 7 |
1-4 family residential |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 5,433 | 5,568 |
Current | 360,456 | 357,384 |
Ending balance | 365,889 | 362,952 | 348,401
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 | 2,701 | 3,724 |
1-4 family residential | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 838 | 803 |
1-4 family residential | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 1,894 | 1,041 |
Multi-family residential |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 228 | 256 |
Current | 23,007 | 25,823 |
Ending balance | 23,235 | 26,079 | 34,538
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 | 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 | 228 | 0 |
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 912 | 905 |
Current | 50,799 | 52,600 |
Ending balance | 51,711 | 53,505 | 54,345
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 | 617 | 613 |
Consumer | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 201 | 205 |
Consumer | 90 Days and Greater Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 94 | 87 |
Agricultural |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 70 | 74 |
Current | 24,379 | 18,827 |
Ending balance | 24,449 | 18,901 | 19,223
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 | 66 | 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 | 4 | 15 |
Overdrafts |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due Loans | 0 | 0 |
Current | 698 | 317 |
Ending balance | 698 | 317 | $ 594
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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