Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended		1 Months Ended	0 Months Ended
	Dec. 31, 2014 Segments	May 28, 2015 Segments	Mar. 05, 2015	May 28, 2015	May 26, 2015	Dec. 31, 2013
Subsequent Event [Line Items]
Common stock, par value	$ 0.01					$ 0.01
Number of operating segments	1
6.625% senior notes due 2021 [Member] | Senior notes [Member]
Subsequent Event [Line Items]
Debt instrument, covenant terms	The Company did not cure the Initial Reporting Defaults within the applicable 60-day grace period and the Initial Reporting Defaults ripened into Events of Default.
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, par value			$ 0.01
Common stock dividend description			A dividend of one preferred stock purchase right (a " Right " and collectively, the " Rights ") for each share of the Company's common stock
Number of operating segments		2
Subsequent Event [Member] | Zero cost collars [Member]
Subsequent Event [Line Items]
Derivative counterparty				Nomura Financial Investment (Korea) Co., Ltd.
Derivative notional amount		84,000,000		$ 84,000,000
Deposit paid to counterparty		5,000,000		$ 5,000,000
Subsequent Event [Member] | 6.625% senior notes due 2021 [Member] | Senior notes [Member]
Subsequent Event [Line Items]
Debt instrument, covenant terms					The Company believes it has cured the default referenced in the 10-K Notice of Default within the applicable 60-day grace period under the Indenture by the filing of this Report with the SEC.
Subsequent Event [Member] | Series A Junior Participating Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, par value			$ 0.01
Purchase price of preferred Stock			$ 24
Number of shares entitle to purchase on each right, once exercisable description			Each Right, once exercisable, will entitle the registered holder to purchase from the Company one one-thousandth of a share of Series A Junior Participating Preferred Stock