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FAIR VALUE DISCLOSURES - Summary of Assets Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale $ 376,436 $ 376,199
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 376,436 376,199
Fair Value, Measurements, Recurring | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 376,360 376,132
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 45,609 23,958
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 98,388 52,401
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 140,965 175,596
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 21,502 58,705
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 69,896 65,472
Fair Value, Measurements, Recurring | Equity Securities | Equity securities - financial services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 76 67
Level 1 | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | Fair Value, Measurements, Recurring | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | 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 0 0
Level 1 | 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 0 0
Level 1 | 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 0 0
Level 1 | 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 0 0
Level 1 | 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 0 0
Level 1 | Fair Value, Measurements, Recurring | Equity Securities | Equity securities - financial services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 2 | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 376,436 376,199
Level 2 | Fair Value, Measurements, Recurring | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 376,360 376,132
Level 2 | 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 45,609 23,958
Level 2 | 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 98,388 52,401
Level 2 | 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 140,965 175,596
Level 2 | 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 21,502 58,705
Level 2 | 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 69,896 65,472
Level 2 | Fair Value, Measurements, Recurring | Equity Securities | Equity securities - financial services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 76 67
Level 3 | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | 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 0 0
Level 3 | 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 0 0
Level 3 | 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 0 0
Level 3 | 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 0 0
Level 3 | 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 0 0
Level 3 | Fair Value, Measurements, Recurring | Equity Securities | Equity securities - financial services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale $ 0 $ 0