Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Parenthetical) (Detail)

v2.4.0.8
Long-Term Debt (Parenthetical) (Detail) (Terminated 95/8% Senior Secured Second Lien Notes)
 9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Terminated 95/8% Senior Secured Second Lien Notes
    
Debt Instrument [Line Items]    
Debt, interest rate 9.625% 9.625%
Debt, maturity year 2016 2016