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Securities - Amortized Cost and Fair Value of Securities Available for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Due within one year, Amortized Cost $ 899  
Due after one year through five years, Amortized Cost 5,301  
Due after five years through ten years, Amortized Cost 20,353  
Due after ten years, Amortized Cost 78,459  
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total 105,013 87,686
Due within one year, Fair Value 923  
Due after one year through five years, Fair Value 5,329  
Due after five years through ten years, Fair Value 19,901  
Due after ten years, Fair Value 77,143  
Available for Sale Securities, Debt Maturities, Fair Value, Total 103,301 89,456
Corporate Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total 1  
Available for Sale Securities, Debt Maturities, Fair Value, Total $ 5