Earnings per Common Share - Computation of Basic and Diluted Earnings per Common Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic
Net income	$ 2,712	$ 1,913
Preferred stock dividends and discount accretion	655	290
Net income available to common shareholders	2,057	1,623
Weighted average common shares outstanding	7,707,917	7,707,917
Basic earnings per common share	$ 0.27	$ 0.21
Diluted
Net income available to common shareholders - basic	2,057	1,623
Convertible preferred stock dividends	388
Net income available to common shareholders - diluted	$ 2,445	$ 1,623
Weighted average common shares outstanding for basic earnings per common share	7,707,917	7,707,917
Add: Dilutive effects of convertible preferred stock	3,196,931
Add: Dilutive effects of assumed exercises of stock options
Average shares and dilutive potential common shares outstanding	10,904,848	7,707,917
Diluted earnings per common share	$ 0.22	$ 0.21