Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Detail)

v2.4.0.8
Fair Value Measurements - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Tax credits to be received 1 year 2 months 12 days    
Percentage of decline in bond value 0.61%    
Loans held for sale    $ 8,306,000 $ 22,587,000
Significant Observable Inputs with No Active Market with Identical Characteristics [Member] | Non-recurring Basis [Member] | Non-Performing Loans Held for Sale [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans held for sale 0 484,000  
Significant Observable Inputs with No Active Market with Identical Characteristics [Member] | Non-recurring Basis [Member] | Small Business Administration Loans Held for Sale [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans held for sale 0 7,800,000  
Zero Coupon Municipal Bond [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Zero coupon tax credit municipal bond, recorded at estimated fair value $ 748,000 $ 779,000