Redeemable Preferred Stock - Additional Information (Detail) (USD $)	12 Months Ended				12 Months Ended				0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 16, 2011	Dec. 31, 2013 Series A Redeemable Preferred Stock	Dec. 31, 2012 Series A Redeemable Preferred Stock	Aug. 20, 2013 Series A Redeemable Preferred Stock	Sep. 15, 2011 Series A Redeemable Preferred Stock	Aug. 20, 2013 Series B Preferred Stock	Dec. 31, 2013 Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized				100,000,000				2,000,000		150,000
Preferred stock, par/stated value	$ 0.01	$ 0.01						$ 0.01		$ 0.01
Liquidation preference								$ 1,000		$ 1,000
Proceeds from issuance of preferred stock	$ 77,241,000	$ 0	$ 0						$ 77,200,000
Preferred stock, shares issued									77,241
Shares of Series A Preferred Stock issuable in the future							0		0
Preferred stock dividends	9,395,000	15,017,000	521,000		6,800,000
Company redeemed and retired shares					49,233
Preferred stock					49,200,000
Unpaid dividends accrued through redemption date					800,000
Dividends accrued						$ 11,100,000