v2.4.0.8
Debt outstanding (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Senior secured term loan
   
Debt Instrument [Line Items]    
Variable interest rate 4.25%  
Maturity date 2/10/2019  
Unamortized discount $ 0.1 $ 0.2
Senior Secured Revolving Line Of Credit [Member]
   
Debt Instrument [Line Items]    
Variable interest rate 4.63%  
Maturity date 2/10/2017  
11.375% Senior notes
   
Debt Instrument [Line Items]    
Fixed interest rate 11.375%  
Unamortized fair value adjustment (91.4) (95.9)
Maturity date 6/15/2018  
9.625% Senior notes
   
Debt Instrument [Line Items]    
Fixed interest rate 9.625%  
Maturity date 6/15/2018  
8.125% Senior notes
   
Debt Instrument [Line Items]    
Fixed interest rate 8.125%  
Maturity date 6/15/2018  
Unamortized discount $ 1.6 $ 1.7