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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Impaired Loans by Class (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | $ 743 | $ 881
Impaired Loans with No Specific Allowance | 5,554 | 10,145
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 743 | 881
Impaired Loans with No Specific Allowance | 7,832 | 13,737
Related Allowance | 38 | 51
Commercial Real Estate | Owner-occupied |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 1,880 | 1,237
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 2,576 | 2,479
Related Allowance | 0 | 0
Commercial Real Estate | Non-owner occupied |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance |  | 0
Impaired Loans with No Specific Allowance |  | 4,065
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance |  | 0
Impaired Loans with No Specific Allowance |  | 4,856
Related Allowance |  | 0
Commercial Real Estate | Multi-family |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 131 | 165
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 336 | 352
Related Allowance | 0 | 0
Commercial Real Estate | Non-owner occupied residential |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 309 | 381
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 632 | 669
Related Allowance | 0 | 0
Acquisition and development | 1-4 family residential construction |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance |  | 0
Impaired Loans with No Specific Allowance |  | 492
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance |  | 0
Impaired Loans with No Specific Allowance |  | 492
Related Allowance |  | 0
Commercial and industrial |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 286 | 350
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 457 | 495
Related Allowance | 0 | 0
Residential mortgage | First lien |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 743 | 872
Impaired Loans with No Specific Allowance | 2,134 | 2,964
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 743 | 872
Impaired Loans with No Specific Allowance | 2,727 | 3,706
Related Allowance | 38 | 42
Residential mortgage | Home equity – term |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 16 | 22
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 23 | 27
Related Allowance | 0 | 0
Residential mortgage | Home equity lines of credit |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 798 | 467
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance | 0 | 0
Impaired Loans with No Specific Allowance | 1,081 | 628
Related Allowance | $ 0 | 0
Installment and other loans |  |
Recorded Investment (Book Balance) |  |
Impaired Loans with a Specific Allowance |  | 9
Impaired Loans with No Specific Allowance |  | 2
Unpaid Principal Balance (Legal Balance) |  |
Impaired Loans with a Specific Allowance |  | 9
Impaired Loans with No Specific Allowance |  | 33
Related Allowance |  | $ 9

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