Stockholders Equity - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity [Line Items]
Preferred Stock, par value	$ 0.01	$ 0.01
Price per one one-thousandth of a preferred share	$ 45.00
Effective date plan reorganization date	Jun. 05, 2013