Debt (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Nov. 05, 2012
Apr. 10, 2012
Debt Instrument [Line Items]        
Aggregate principal amount of debt     $ 150.0 $ 250.0
Interest Rate 3.30%      
Notes payable 1.1 2.1    
Capital lease obligation 18.8 17.9    
Debt instrument maturity year, minimum 2014      
Debt instrument maturity year, maximum 2017      
2018 Notes
        
Debt Instrument [Line Items]        
Effective interest rate 11.00%      
Aggregate principal amount of debt 400.0   150.0 250.0
Interest Rate 9.875% [1]   9.875% 9.875%
Revolving credit facility
        
Debt Instrument [Line Items]        
Revolving credit facility $ 325.0      
[1] The interest rate presented represents the coupon rate on the Company's outstanding $400 million aggregate principal amounts of 9.875% Senior Notes due 2018 (the "2018 Notes"), excluding the effect of deferred financing costs, original issue discounts and original issue premiums. Including the effect of these items, the effective interest rate on the 2018 Notes is approximately 11.0%.