Goodwill - Additional Information (Detail) (USD $)	1 Months Ended
	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2000 Branch
Goodwill And Other Intangible Assets [Line Items]
Goodwill		$ 2,807,842	$ 2,807,842
Number of branches purchased during the years 1994 through 2000				5
Impairment of goodwill	$ 0