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SECURITIES AVAILABLE FOR SALE - Additional Information (Detail)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Security
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Security
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Security
Schedule of Available-for-sale Securities [Line Items]          
Securities held 45   45   37
Gross gains on the sales of securities | $ $ 353 $ 874 $ 1,906 $ 1,519  
Gross losses on securities available for sale | $ 0 $ 272 24 $ 320  
Fair value of securities pledged to secure public funds and other purposes | $ $ 241,016   $ 241,016   $ 261,034
Mortgage-backed Securities Issued by U.S. Treasuries and Government Sponsored Enterprises (GSE)          
Schedule of Available-for-sale Securities [Line Items]          
Securities held 15   15   21
Securities held, less than 12 months category 12   12   13
Securities held, more than 12 months category         8
States and political subdivisions          
Schedule of Available-for-sale Securities [Line Items]          
Securities held 30   30    
Securities held, less than 12 months category 25   25    
Securities held, more than 12 months category         16