Fair Value Disclosures - Summary of Additional Qualitative Information (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 8,485	$ 6,457
Valuation Techniques	Appraisal of collateral	Appraisal of collateral
Impaired Loans [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Management adjustments on appraisals for property type and recent activity	Management adjustments on appraisals for property type and recent activity
Impaired Loans [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Management adjustments for liquidation expenses	Management adjustments for liquidation expenses
Impaired Loans [Member] \| Minimum [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	0.00%	0.00%
Impaired Loans [Member] \| Minimum [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	5.00%	5.00%
Impaired Loans [Member] \| Maximum [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	30.00%	30.00%
Impaired Loans [Member] \| Maximum [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	10.00%	10.00%
Foreclosed Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 825	$ 558
Valuation Techniques	Appraisal of collateral	Appraisal of collateral
Foreclosed Real Estate [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Management adjustments on appraisals for property type and recent activity	Management adjustments on appraisals for property type and recent activity
Foreclosed Real Estate [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Management adjustments for liquidation expenses	Management adjustments for liquidation expenses
Foreclosed Real Estate [Member] \| Minimum [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	0.00%	0.00%
Foreclosed Real Estate [Member] \| Minimum [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	5.00%	5.00%
Foreclosed Real Estate [Member] \| Maximum [Member] \| Management Adjustments on Appraisals for Property Type and Recent Activity [Member] \| Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	30.00%	30.00%
Foreclosed Real Estate [Member] \| Maximum [Member] \| Management Adjustments for Liquidation Expenses [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	25.00%	10.00%