XML 36 R67.htm IDEA: XBRL DOCUMENT v3.3.0.814
Fair Value Disclosures - Carrying Value and Fair Value of Financial Instruments (Parenthetical) (Detail)
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
7.75% Senior Notes due 2020 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated interest rate of senior notes 7.75% 7.75%
Maturity of senior notes, year 2020 2020
5.25% Senior Notes due 2021 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated interest rate of senior notes 5.25% 5.25%
Maturity of senior notes, year 2021 2021
5.875% Senior Notes due 2023 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated interest rate of senior notes 5.875%  
Maturity of senior notes, year 2023  
5.625% Senior Notes due 2024 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated interest rate of senior notes 5.625% 5.625%
Maturity of senior notes, year 2024 2024