Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) (Non-Recurring Fair Value Measurements [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 11,358	$ 14,956
Valuation Technique	Multiple data points, including discount to appraised value of collateral based on recent market activity
Quantitative Range of Unobservable Inputs (Weighted-Average)	(11.60%)
Foreclosed Property and Other Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	5,832	11,368
Valuation Technique	Discount to appraised value of property based on recent market activity for sales of similar properties
Quantitative Range of Unobservable Inputs (Weighted-Average)	(9.30%)
Minimum [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	11,358
Valuation Technique	Multiple data points,
Quantitative Range of Unobservable Inputs (Weighted-Average)	9.00%
Minimum [Member] | Foreclosed Property and Other Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 5,832
Valuation Technique	Discount to appraised value
Quantitative Range of Unobservable Inputs (Weighted-Average)	9.00%
Maximum [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	including discount to
Quantitative Range of Unobservable Inputs (Weighted-Average)	30.00%
Maximum [Member] | Foreclosed Property and Other Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	of property based on recent
Quantitative Range of Unobservable Inputs (Weighted-Average)	10.00%