Allowance for Loan Losses - Summary of Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended
	Jun. 30, 2014 Construction, Land and Land Development Loan		Jun. 30, 2014 Construction, Land and Land Development Loan		Jun. 30, 2013 Residential First Mortgages Loan		Jun. 30, 2014 Residential Revolving and Junior Mortgages Loan	Jun. 30, 2014 Residential Revolving and Junior Mortgages Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	2	[1]	2	[1]	2	[2]
Pre-Modification Outstanding Recorded Investment	$ 282		$ 282		$ 315
Post-Modification Outstanding Recorded Investment	282		282		315
Subsequently defaulted number of loans							1	1
Subsequently defaulted recorded investment							$ 75	$ 75

[1] Modifications were an extension of the loan terms.

[2] Modifications were capitalization of the interest.