Shareholders Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Sep. 15, 2012	Jan. 23, 2012	Sep. 30, 2012	Dec. 31, 2011
Stockholders Equity Note [Line Items]
Common stock, par value			$ 0.01	$ 5.00
Percentage of stock dividend declared to shareholders		5.00%
Common Stock Dividend		137,873
Reclassification of retained earnings		$ 1.4
Issuance of warrant (in share)	55,018
Warrant exercise price	11.36		11.42
Warrant exercised term	8 years
Issuance of warrant	$ 0.3
Dividend rate	0.00%
Risk free factor	1.20%
Volatility factor	42.00%
Warrants outstanding			158,743
Warrant expiry date			2013-02