Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v2.4.0.8
Fair Value Measurements - Additional Information (Detail) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2014
Significant Observable Inputs with No Active Market with Identical Characteristics [Member]
Non-recurring Basis [Member]
Non-Performing Loans Held for Sale [Member]
Dec. 31, 2013
Significant Observable Inputs with No Active Market with Identical Characteristics [Member]
Non-recurring Basis [Member]
Non-Performing Loans Held for Sale [Member]
Mar. 31, 2014
Significant Observable Inputs with No Active Market with Identical Characteristics [Member]
Non-recurring Basis [Member]
Small Business Administration Loans Held for Sale [Member]
Dec. 31, 2013
Significant Observable Inputs with No Active Market with Identical Characteristics [Member]
Non-recurring Basis [Member]
Small Business Administration Loans Held for Sale [Member]
Mar. 31, 2014
Zero Coupon Municipal Bond [Member]
Dec. 31, 2013
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               $ 737,000 $ 748,000
Tax credits to be received 11 months 27 days                
Loans held for sale 390,000 6,043,000 8,306,000 0 0 390,000,000 0    
Transfers of assets between Level 1 and Level 2 of fair value hierarchy $ 0