v2.4.0.8
Notes Redemption Prices for Future year (Detail)
9 Months Ended
Sep. 30, 2013
Senior Notes Redeemed During Twelve Months Beginning February 1, 2018
 
Debt Instrument [Line Items]  
Percentage of Principal Amount of Notes 102.375%
Senior Notes Redeemed During Twelve Months Beginning February 1, 2019
 
Debt Instrument [Line Items]  
Percentage of Principal Amount of Notes 101.583%
Senior Notes Redeemed During Twelve Months Beginning February 1, 2020
 
Debt Instrument [Line Items]  
Percentage of Principal Amount of Notes 100.792%
Senior Notes Redeemed During Twelve Months Beginning February 1, 2021
 
Debt Instrument [Line Items]  
Percentage of Principal Amount of Notes 100.00%