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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Impaired Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | $ 8,356 | $ 5,717
Unpaid Principal Balance, With related allowance recorded | 3,000 | 623
Unpaid Principal Balance | 11,356 | 6,340
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 8,356 | 5,717
Recorded Investment, With related allowance recorded | 3,000 | 623
Recorded Investment | 11,356 | 6,340
Related Allowance [Abstract] |  |
Related Allowance | 493 | 134
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 8,202 | 6,786
Average Recorded Investment, With related allowance recorded | 1,348 | 1,953
Average Recorded Investment | 9,550 | 8,739
Commercial and industrial |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 837 | 437
Unpaid Principal Balance, With related allowance recorded | 185 | 26
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 837 | 437
Recorded Investment, With related allowance recorded | 185 | 26
Related Allowance [Abstract] |  |
Related Allowance | 64 | 17
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 842 | 434
Average Recorded Investment, With related allowance recorded | 300 | 315
Construction and development |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 720 | 0
Unpaid Principal Balance, With related allowance recorded | 530 | 0
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 720 | 0
Recorded Investment, With related allowance recorded | 530 | 0
Related Allowance [Abstract] |  |
Related Allowance | 4 | 0
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 518 | 311
Average Recorded Investment, With related allowance recorded | 44 | 7
Commercial real estate |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 5,168 | 3,979
Unpaid Principal Balance, With related allowance recorded | 1,985 | 279
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 5,168 | 3,979
Recorded Investment, With related allowance recorded | 1,985 | 279
Related Allowance [Abstract] |  |
Related Allowance | 341 | 27
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 5,138 | 4,230
Average Recorded Investment, With related allowance recorded | 677 | 505
Farmland |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 0 | 6
Unpaid Principal Balance, With related allowance recorded | 140 | 157
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 0 | 6
Recorded Investment, With related allowance recorded | 140 | 157
Related Allowance [Abstract] |  |
Related Allowance | 78 | 85
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 62 | 90
Average Recorded Investment, With related allowance recorded | 147 | 131
1-4 family residential |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 1,223 | 681
Unpaid Principal Balance, With related allowance recorded | 160 | 161
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 1,223 | 681
Recorded Investment, With related allowance recorded | 160 | 161
Related Allowance [Abstract] |  |
Related Allowance | 6 | 5
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 1,132 | 1,096
Average Recorded Investment, With related allowance recorded | 128 | 754
Multi-family residential |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 0 | 217
Unpaid Principal Balance, With related allowance recorded | 0 | 0
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 0 | 217
Recorded Investment, With related allowance recorded | 0 | 0
Related Allowance [Abstract] |  |
Related Allowance | 0 | 0
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 54 | 180
Average Recorded Investment, With related allowance recorded | 0 | 19
Consumer |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 0 | 0
Unpaid Principal Balance, With related allowance recorded | 0 | 0
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 0 | 0
Recorded Investment, With related allowance recorded | 0 | 0
Related Allowance [Abstract] |  |
Related Allowance | 0 | 0
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 0 | 61
Average Recorded Investment, With related allowance recorded | 0 | 42
Agricultural |  |
Unpaid Principal Balance [Abstract] |  |
Unpaid Principal Balance, With no related allowance recorded | 408 | 397
Unpaid Principal Balance, With related allowance recorded | 0 | 0
Recorded Investment [Abstract] |  |
Recorded Investment, With no related allowance recorded | 408 | 397
Recorded Investment, With related allowance recorded | 0 | 0
Related Allowance [Abstract] |  |
Related Allowance | 0 | 0
Average Recorded Investment [Abstract] |  |
Average Recorded Investment, With no related allowance recorded | 456 | 384
Average Recorded Investment, With related allowance recorded | $ 52 | $ 180

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