Shareholders' Equity - Additional Information (Detail)			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Restricted stock to certain employees [Member]	Sep. 30, 2012 Director Restricted stock [Member]	Oct. 24, 2012 Subsequent Event [Member]
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	12,751,690	12,726,388
Common stock, shares outstanding	12,751,690	12,726,388
Common stock, future issuance					427,725
Restricted stock awarded			8,020	17,613
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued