Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Parenthetical) (Detail)

v2.4.0.6
Long-Term Debt (Parenthetical) (Detail)
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Debt, maturity year 2016  
9 5/8% Senior Secured Second Lien Notes
   
Debt Instrument [Line Items]    
Debt, interest rate 9.625% 9.625%
Debt, maturity year 2016 2016