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LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired Loans by Class (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) $ 729 $ 643
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 731 643
Impaired Loans with a Specific Allowance, Related Allowance 132 43
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 6,571 7,330
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 9,196 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) 1,081 1,070
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 2,274 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) 190 199
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 364 368
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) 436 452
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 697 706
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) 91 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 93 0
Impaired Loans with a Specific Allowance, Related Allowance 91 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 386 594
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 419 715
Residential mortgage | First lien    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 638 643
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 638 643
Impaired Loans with a Specific Allowance, Related Allowance 41 43
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 3,848 3,650
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 4,634 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) 109 93
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 120 103
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) 516 529
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 654 659
Installment and other loans    
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) 5 6
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) $ 34 $ 34