Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Parenthetical) (Detail)

v2.4.0.8
Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Parenthetical) (Detail)
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Stated interest rate on debt agreement 5.00%  
7.0% Senior Subordinated Notes Due 2022 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Stated interest rate on debt agreement 7.00% 7.00%
5.0% Senior Subordinated Notes due 2023 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Stated interest rate on debt agreement 5.00% 5.00%