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Components of Long-Term Debt and Capital Lease Obligations (Parenthetical) (Detail)
Dec. 31, 2013
6 3/4 % Senior Notes Due 2020
 
Long-Term Debt And Capital Lease Obligations [Line Items]  
Interest percentage 6.75%
Debt maturity period 2020
6.0% Senior Notes Due 2022
 
Long-Term Debt And Capital Lease Obligations [Line Items]  
Interest percentage 6.00%
Debt maturity period 2022