Gross Amounts and Fair Value of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Term loan
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Carrying value	$ 1,953,875	$ 2,025,000
Term loan | Significant Other Observable Inputs (Level 2)
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair value - Level 2	1,914,798	2,025,000
Second Lien Term Loan
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Carrying value	0	25,000
Second Lien Term Loan | Significant Other Observable Inputs (Level 2)
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair value - Level 2	0	25,000
7.75% senior notes
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Carrying value	610,000	610,000
7.75% senior notes | Significant Other Observable Inputs (Level 2)
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair value - Level 2	$ 620,675	$ 641,598