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Fair Value - Quantitative Information About Level 3 Fair Value Measurements (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Corporate Notes and Bonds [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Fair value   $ 1,980
Corporate Notes and Bonds [Member] | Constant Prepayment Rate [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized one   0.00%
Corporate Notes and Bonds [Member] | Probability of Default [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized one   0.00%
Corporate Notes and Bonds [Member] | Discount Rate [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized one   9.60%
Pooled Trust Preferred [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Fair value $ 661 $ 600
Pooled Trust Preferred [Member] | Collateral Default Rate [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized two 2% in 2014; 1.5% in 2015; 1.0% in 2016; 0.5% in 2017 and thereafter 2% annually for 2 years; 0.36% thereafter
Pooled Trust Preferred [Member] | Yield [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized one 15.00% 13.00%
Pooled Trust Preferred [Member] | Recovery Probability [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized two   10%, lagged 2 years
Pooled Trust Preferred [Member] | Prepayment Speed [Member] | Discounted Cash Flow [Member]
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Input utilized two 2.0% constant prepayment rate in 2014 and thereafter