Outstanding Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	May 28, 2013
7.875% senior notes, due 2021
Debt Instrument [Line Items]
Long-Term Debt, interest rate	7.875%	7.875%
Long-Term Debt, maturity date, year	2021	2021
10.25% Senior Notes, due 2017
Debt Instrument [Line Items]
Long-Term Debt, interest rate	10.25%	10.25%	10.25%
Long-Term Debt, maturity date, year	2017	2017
Revolving Credit Facility, due January 2017
Debt Instrument [Line Items]
Long-Term Debt, maturity date	2017-01	2017-01