Long Term Debt - Advances of Long Term Debt (Detail) (USD $)					9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Sep. 30, 2013 Adjustable Rate Hybrid [Member]	Sep. 30, 2013 Fixed Rate Hybrid [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank advances	$ 15,000,000	$ 15,000,000	[1]	$ 15,000,000	$ 10,000,000	$ 5,000,000
Originated					Apr. 12, 2013	May 20, 2011
Current Interest Rate					2.38%	2.69%
Maturity Date					Apr. 13, 2020	May 20, 2014

[1] Derived from the audited consolidated financial statements.