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Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets $ 5,656 $ 6,345
Core deposits [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets 2,564 3,005
Customer relationships [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets 2,643 2,828
Non-compete agreements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets $ 449 $ 512