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Goodwill and Other Intangibles - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Goodwill And Other Intangible Assets [Line Items]    
Impairment of goodwill $ 0 $ 0
Amortization expense 0 32,000
Intangible assets 747,000  
Hometown Bancshares, Inc.
   
Goodwill And Other Intangible Assets [Line Items]    
Goodwill acquired $ 5,400,000