Preferred Stock - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Equity [Abstract]
Preferred stock, liquidation preference, per share	$ 100
Preferred stock, cumulative dividend rate (in percent)	7.50%
Preferred stock, cumulative dividend rate per share	$ 7.50
Preferred stock, liquidation preference, value	$ 41,894
Redemption of preferred, term	The Company, at its option, may redeem the preferred stock subject to available liquidity and compliance with any applicable legal requirements and contractual obligations, in whole or in part, at a price equal to 100% of the liquidation preference, plus all accrued and unpaid dividends
Percentage of per share price of liquidation preference for redemption	100.00%
Preferred stock, par value	$ 0.01	$ 0.01
Conversion price per share	$ 7.05
Preferred stock, shares outstanding	417,639	417,639
Conversion rate of the preferred stock to common stock	14.1844
Common stock issuable upon conversion, shares	5,924,000