Loans - Summary of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	$ 377,174	$ 364,341
Deferred loan costs	260	239
Total Loans	377,434	364,580
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	116,190	104,899
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	126,423	119,192
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	112,819	110,412
Construction & Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	14,904	23,358
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	$ 6,838	$ 6,480