Allowance for Loan Losses - Summary of Troubled Debt Restructurings (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013 Residential First Mortgages [Member] Loans	Jun. 30, 2012 Commercial Mortgages (Owner Occupied) [Member] Loans	Jun. 30, 2012 Residential First Mortgage [Member] Loans	Jun. 30, 2012 Consumer [Member] Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	2	1	1	1
Pre-Modification Outstanding Recorded Investment	$ 314,889	$ 479,115	$ 650,113	$ 94,210
Post-Modification Outstanding Recorded Investment	$ 314,665	$ 479,115	$ 650,113	$ 94,210