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Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Short-term Debt [Line Items]    
Total $ 4,590 $ 4,571
Weighted average interest rate 0.13% 0.40%
Federal Funds Purchased [Member]
    
Short-term Debt [Line Items]    
Total 700 200
Repurchase Agreements [Member]
    
Short-term Debt [Line Items]    
Total $ 3,890 $ 4,371
Short-term Debt [Member]
    
Short-term Debt [Line Items]    
End of period interest rate 0.15% 0.15%