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LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired Loans by Class (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) $ 558 $ 643
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 558 643
Impaired Loans with a Specific Allowance, Related Allowance 45 43
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 5,806 7,330
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 8,430 10,559
Commercial real estate | Owner-occupied    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 909 1,070
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 2,098 2,236
Commercial real estate | Non-owner occupied    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance)   0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance)   0
Impaired Loans with a Specific Allowance, Related Allowance   0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance)   736
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance)   1,323
Commercial real estate | Multi-family    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 182 199
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 360 368
Commercial real estate | Non-owner occupied residential    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 418 452
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 688 706
Acquisition and development | Commercial and land development    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance)   0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance)   0
Impaired Loans with a Specific Allowance, Related Allowance   0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance)   1
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance)   16
Commercial and industrial    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 376 594
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 508 715
Residential mortgage | First lien    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 553 643
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 553 643
Impaired Loans with a Specific Allowance, Related Allowance 40 43
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 3,420 3,650
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 4,101 4,399
Residential mortgage | Home equity - term    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 25 93
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 29 103
Residential mortgage | Home equity - lines of credit    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 472 529
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 613 659
Installment and other loans    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 5 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 5 0
Impaired Loans with a Specific Allowance, Related Allowance 5 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 4 6
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) $ 33 $ 34