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Fair Values of Company's Derivatives (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Derivative [Line Items]      
Derivative Assets $ 7 $ 84 $ 19
Derivative Liabilities 196 41 19
Derivatives Not Designated As Hedges
     
Derivative [Line Items]      
Derivative Assets 7 41 19
Derivative Liabilities 7 41 19
Interest Rate Swaps Agreement | Designated as Hedging Instrument
     
Derivative [Line Items]      
Derivative Assets   43  
Derivative Liabilities 189    
IRLCs | Derivatives Not Designated As Hedges
     
Derivative [Line Items]      
Derivative Assets     19
Derivative Liabilities 7 41 19
Forward Sale Loan Commitments | Derivatives Not Designated As Hedges
     
Derivative [Line Items]      
Derivative Assets $ 7 $ 41