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PREMISES AND EQUIPMENT - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 2,459us-gaap_Depreciation $ 2,208us-gaap_Depreciation $ 2,004us-gaap_Depreciation
Rent expense $ 427us-gaap_LeaseAndRentalExpense $ 307us-gaap_LeaseAndRentalExpense $ 259us-gaap_LeaseAndRentalExpense