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FAIR VALUE - Summary of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed real estate $ 1,012 $ 346
Fair Value, Measurements, Nonrecurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 3,080 4,350
Fair Value, Measurements, Nonrecurring | Commercial real estate | Owner-occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 517 777
Fair Value, Measurements, Nonrecurring | Commercial real estate | Non-owner occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   736
Fair Value, Measurements, Nonrecurring | Commercial real estate | Multi-family    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 182 199
Fair Value, Measurements, Nonrecurring | Commercial real estate | Non-owner occupied residential    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 378 409
Fair Value, Measurements, Nonrecurring | Acquisition and development | Commercial and land development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   1
Fair Value, Measurements, Nonrecurring | Commercial and industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 63 66
Fair Value, Measurements, Nonrecurring | Residential mortgage    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed real estate 22 88
Fair Value, Measurements, Nonrecurring | Residential mortgage | First lien    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 1,781 1,994
Fair Value, Measurements, Nonrecurring | Residential mortgage | Home equity - lines of credit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 154 162
Fair Value, Measurements, Nonrecurring | Installment and other loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 5 6
Fair Value, Measurements, Nonrecurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Commercial real estate | Owner-occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Commercial real estate | Non-owner occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   0
Fair Value, Measurements, Nonrecurring | Level 1 | Commercial real estate | Multi-family    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Commercial real estate | Non-owner occupied residential    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Acquisition and development | Commercial and land development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   0
Fair Value, Measurements, Nonrecurring | Level 1 | Commercial and industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Residential mortgage    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed real estate 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Residential mortgage | First lien    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Residential mortgage | Home equity - lines of credit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 1 | Installment and other loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Commercial real estate | Owner-occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Commercial real estate | Non-owner occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   0
Fair Value, Measurements, Nonrecurring | Level 2 | Commercial real estate | Multi-family    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Commercial real estate | Non-owner occupied residential    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Acquisition and development | Commercial and land development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   0
Fair Value, Measurements, Nonrecurring | Level 2 | Commercial and industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Residential mortgage    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed real estate 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Residential mortgage | First lien    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Residential mortgage | Home equity - lines of credit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 2 | Installment and other loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 0 0
Fair Value, Measurements, Nonrecurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 3,080 4,350
Fair Value, Measurements, Nonrecurring | Level 3 | Commercial real estate | Owner-occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 517 777
Fair Value, Measurements, Nonrecurring | Level 3 | Commercial real estate | Non-owner occupied    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   736
Fair Value, Measurements, Nonrecurring | Level 3 | Commercial real estate | Multi-family    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 182 199
Fair Value, Measurements, Nonrecurring | Level 3 | Commercial real estate | Non-owner occupied residential    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 378 409
Fair Value, Measurements, Nonrecurring | Level 3 | Acquisition and development | Commercial and land development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net   1
Fair Value, Measurements, Nonrecurring | Level 3 | Commercial and industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 63 66
Fair Value, Measurements, Nonrecurring | Level 3 | Residential mortgage    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed real estate 22 88
Fair Value, Measurements, Nonrecurring | Level 3 | Residential mortgage | First lien    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 1,781 1,994
Fair Value, Measurements, Nonrecurring | Level 3 | Residential mortgage | Home equity - lines of credit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net 154 162
Fair Value, Measurements, Nonrecurring | Level 3 | Installment and other loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans, net $ 5 $ 6