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FAIR VALUE DISCLOSURES - Summary of Assets Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | $ 374,902 | $ 394,124
Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 374,902 | 394,124
Fair Value, Measurements, Recurring | Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 374,824 | 394,051
Fair Value, Measurements, Recurring | Debt Securities | U.S. Government Agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 41,869 | 47,227
Fair Value, Measurements, Recurring | Debt Securities | States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 130,399 | 125,961
Fair Value, Measurements, Recurring | Debt Securities | U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 123,881 | 132,349
Fair Value, Measurements, Recurring | Debt Securities | GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 72,698 | 15,843
Fair Value, Measurements, Recurring | Debt Securities | GSE commercial CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale |  | 63,770
Fair Value, Measurements, Recurring | Debt Securities | Private label CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 5,977 | 8,901
Fair Value, Measurements, Recurring | Equity securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 78 | 73
Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | U.S. Government Agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | GSE commercial CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale |  | 0
Fair Value, Measurements, Recurring | Level 1 | Debt Securities | Private label CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Equity securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 374,902 | 394,124
Fair Value, Measurements, Recurring | Level 2 | Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 374,824 | 394,051
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | U.S. Government Agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 41,869 | 47,227
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 130,399 | 125,961
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 123,881 | 132,349
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 72,698 | 15,843
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | GSE commercial CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale |  | 63,770
Fair Value, Measurements, Recurring | Level 2 | Debt Securities | Private label CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 5,977 | 8,901
Fair Value, Measurements, Recurring | Level 2 | Equity securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 78 | 73
Fair Value, Measurements, Recurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | U.S. Government Agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | GSE commercial CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale |  | 0
Fair Value, Measurements, Recurring | Level 3 | Debt Securities | Private label CMOs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Equity securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | $ 0 | $ 0

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