Earnings Applicable to Common Stockholders (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share Basic [Line Items]
Net income available to common stock holders, basic	$ 998,000	$ 766,000	$ 2,823,000	$ 2,562,000
Net income available to common stock holders, diluted	$ 998,000	$ 766,000	$ 2,823,000	$ 2,562,000
Weighted average number of shares outstanding, basic	5,102,572	3,108,867	4,058,432	3,099,024
Effect of dilutive shares:
Restricted stock grants	47,945	26,378	47,945	26,378
Weighted average number of shares outstanding, diluted	5,150,517	3,135,245	4,106,377	3,125,402
Basic per share	$ 0.20	$ 0.25	$ 0.70	$ 0.83
Diluted per share	$ 0.19	$ 0.24	$ 0.69	$ 0.82