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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]          
Recorded Goodwill $ 31,591   $ 31,591   $ 30,143
Finite-Lived Intangible Assets [Line Items]          
Aggregate amortization expense 890 973 2,773 1,707  
Core deposit intangibles
          
Finite-Lived Intangible Assets [Line Items]          
Weighted average amortization period     5 years 6 months    
Core deposit intangibles | Minimum
          
Finite-Lived Intangible Assets [Line Items]          
Amortization period of other intangible assets     4 years    
Core deposit intangibles | Maximum
          
Finite-Lived Intangible Assets [Line Items]          
Amortization period of other intangible assets     7 years    
Customer relationship intangible
          
Finite-Lived Intangible Assets [Line Items]          
Amortization period of other intangible assets     5 years    
Remaining amortization period     4 years 3 months 18 days    
Trade Name
          
Indefinite-lived Intangible Assets [Line Items]          
Indefinite lived intangible assets $ 780   $ 780