| Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended | |
|---|---|---|---|
| Oct. 24, 2012 | Jun. 10, 2011 | Dec. 31, 2013 | |
| Debt Instrument [Line Items] | |||
| Aggregate annual maturities of long-term debt, 2014 | $ 0 | ||
| Aggregate annual maturities of long-term debt, 2015 | 0 | ||
| Aggregate annual maturities of long-term debt, 2016 | 0 | ||
| Aggregate annual maturities of long-term debt, 2017 | 0 | ||
| Aggregate annual maturities of long-term debt, thereafter | $ 1,190.0 | ||
| Senior notes interest rate | 8.50% | ||
| Senior notes maturity date | Jun. 15, 2019 | ||
| 8.50% Senior Notes, due June 2019 | |||
| Debt Instrument [Line Items] | |||
| Senior notes interest rate | 8.50% | 8.50% | 8.50% | 
| Senior notes maturity date | Jun. 15, 2019 | Jun. 15, 2019 | Jun. 15, 2019 | 
| Revolving Bank Credit Facility Due November 2018 | |||
| Debt Instrument [Line Items] | |||
| Senior notes maturity date | Nov. 08, 2018 | ||
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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