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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Branch
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Subsidiary
Dec. 31, 2012
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 39,244 $ 31,591 $ 30,143 $ 7,048
Impairment on intangible assets $ 258 48 $ 1,061  
Number of branch locations sold | Branch 2      
Number of banking subsidiaries merged into a single bank | Subsidiary     2  
Aggregate amortization expense $ 5,836 4,079 $ 2,651  
Banking        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 37,100      
Mortgage Banking        
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 2,100      
Core deposit intangibles        
Finite-Lived Intangible Assets [Line Items]        
Weighted average amortization period 7 years 4 months 13 days      
Impairment on intangible assets $ 258 $ 48 85  
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 10 years      
Customer relationship intangible        
Finite-Lived Intangible Assets [Line Items]        
Amortization period of other intangible assets 5 years      
Remaining amortization period 3 years 29 days      
Trade name intangibles        
Finite-Lived Intangible Assets [Line Items]        
Impairment on intangible assets     $ 976